The atomic number of rubidium is 37, it means that its electron configuration is as follows:
[tex]1s^22s^22p^63s^23p^64s^23d^{10}4p^65s^1[/tex]Rubidium is an alkali metal. Its ion is formed when it loses an electron. It means that the rubidium ion has 36 electrons instead of 37, and its configuration is as follows:
[tex]1s^22s^22p^63s^23p^64s^23d^{10}4p^6[/tex]. Which of the following statements is not correct? A. Density has no units. B. Every measurement has a unit tied to it. C. Physical quantities are properties that can be measured. D. the Kelvin degree is larger than the Celsius degree.
Answer:
A because density DOES have a unit
Explanation:
Who was the Russian chemist that arranged the elements of the periodic table in order of increasing atomic mass?
Answer:Dmitri Mendeleev
Explanation:
Why is reactivity with oxygen a chemical property?
The reactivity of a substance with oxygen is a chemical, not a physical property. The reason it is called a chemical property is that it relies on its electron configuration to determine how it behaves around other substances.
What is a chemical property?A chemical property is a property of any material that becomes apparent during or after a chemical reaction; that is, any quality that can only be determined by changing the chemical properties of a substance.
Oxygen is a very reactive element, is highly paramagnetic and readily combines with other elements. One of the most important chemical properties of oxygen is that it promotes combustion. Even at room temperature, oxygen binds to elements and forms e.g. rust.
Learn more about Chemical properties:
https://brainly.com/question/28308645
#SPJ1
a sample of an ideal gas at 1.00 atm and a volume of 1.52 l was placed in a weighted balloon and dropped into the ocean. as the sample descended, the water pressure compressed the balloon and reduced its volume. when the pressure had increased to 70.0 atm, what was the volume of the sample? assume that the temperature was held constant.
The volume of the balloon when the balloon descended down in the water becomes 0.0217 Liters.
We know, from the Boyle's Law,
If the temperature of a gas is kept constant, the pressure of the gas and the volume of the gas becomes inversely proportional to each other.
So, we can write,
P₁V₁ = P₂V₂
Where,
P₁ is the initial pressure of the gas,
V₁ is the initial volume of the gas,
P₂ is the final pressure of the gas,
V₂ is the final volume of the gas.
According to the given condition, the initial volume of the ideal gas was 1.52 L and the initial pressure of the gas is 1 atm and the final pressure of the gas is 70 atm while the final volume is unknown,
So,
1.52 x 1 = V₂ x 70
V₂ = 0.0217 Liters.
The final Volume of the gas is 0.0217 Liters.
To know more about Boyle's Law, visit,
https://brainly.com/question/1696010
#SPJ4
What do all waves have in common?
you can always see them
They carry energy
They absorb light
They do not carry energy
Answer:
I think it's carry energy, but I'm not sure
a sample of gas occupies a volume of 70.3 ml . as it expands, it does 140.6 j of work on its surroundings at a constant pressure of 783 torr . what is the final volume of the gas?
A sample of gas occupies a volume of 70.3 ml as it expands, it does 140.6 j of work on its surroundings at a constant pressure of 783 torr and the final volume of the gas is 11.12L
A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container and even in the presence of gravity and regardless of the amount of substance in the container
Here given data is 11.12L
V₁ = Initial volume = 70.3 ml = 0.0703ml = (1L=1000ml)
w = 140.6 J = 1.387 J = (1Latm=101.3J)
Pressure = 783 torr = 1.03 atm = (1atm=760 torr)
V₂ = final volume = ?
1.387Latm = 1.03 atm × (V₂ - 0.0703ml)
(V₂ - 0.0703ml) = 11.05
V₂ = 11.12L
The final volume of the gas is 11.12L
Know more about volume
https://brainly.com/question/14832112
#SPJ1
a drug you're investigating demonstrates >90% absorption, but it's highest unit dose does not completely dissolve in 250 ml of solvent. the biopharmaceutics classification system would identify this drug as class:
The biopharmaceutics classification system would identify this drug as class ll drug having greater than 90% absorption.
What is biopharmaceutics classification system and which class drug have more than 90% absorption?BCS biopharmaceutics classification system is a system classifying a drug substance based on its solubility.There is a certain range of PH for this solubility to follow to be validated for human doses.Now in this question is asked about highest unit dose having absorption capacity of more than 90% and what class this drug does belong to.Class - ll is the class of drug having absorption power more than 90% and its highest unit dose does not completely in 250 ml .To know more about biopharmaceutics visit:
https://brainly.com/question/16107948
#SPJ4
selective analysis of an analyte and internal standard yielded detector responses of 3.47 and 5.23 respectively when each had a concentration of 1.00 ppm. five ml of an unknown analyte solution were mixed with 1 ml of 5.00 ppm internal standard and then diluted to a total of 10 ml. the detector responses for analyte and internal standard for this mixture were 4.26 and 2.43. calculate the concentration of the analyte in the unknown solution. report your answer in ppm.
By calculating the response factor for the internal standard first, we can calculate that the concentration of the unknown analyte sample is 2.64 ppm.
When solving problems like this, we need to calculate the appropriate response factor:
A(X) / C(X) = F * A(S) / C(S)
A(X) - response for the analyte (3.47)
C(X) - concentration of the analyte (1 ppm)
F - response factor
A(S) - response for the internal standard (5.23)
C(S) - concentration of the internal standard (1 ppm)
F = A(X) * C(S) / (C(X) * A(S)
F = 3.47 * 1 ppm / (5.23 * 1 ppm)
F = 0.663
Now we can use this in the second calculation to obtain the concentration of the analyte in the sample. One thing to note is that in second measurement 1 mL of a 5.00 ppm internal standard was diluted to 10 mL, so the concentration of the internal standard is actually 5.00 ppm / 10 = 0.500 ppm.
4.26 / C(X) = 0.663 * 2.43 / 0.500 ppm
C(X) = 4.26 * 0.500 ppm / (0.663 * 2.43)
C(X) = 1.32 ppm
Because 5 mL of the analyte solution were diluted to 10 mL, the concentration is actually 2 * 1.32 ppm = 2.64 ppm.
You can learn more about the use of internal standards here:
brainly.com/question/16252298
#SPJ4
help pleasee! will
give brainliest +80 pts
Answer: type the compound into your search bar then it should tell you what it is for 3. you should look up "what is the formula for -----" same thing for #4
Explanation:
Answer:
2.a. germanium tetrahydride
2.b. dinitrogen tetrabromide
2.c. diphosphorus pentasulfide
2.d. selenium dioxide
2.e. nitrogen trihydride
2.f. silicon dioxide
3.a. PO3
3.b. SiCl4
3.c. N2O5
3.e. N2O4
3.f. CO
4.a CO2
4.b. SF6
4.c. N2Cl4
4.d. CI4
4.e. PF5
4.f. P2O5
****All numbers are subscripts, please do not write them as is, but to the bottom right of them like shown in the options from question 2.
Explanation:
To name covalent compounds (NM+NM), we use prefixes.
To name covalent compounds goes as follows:
First, name the first element in the formula the normal name it has (ex. Nitrogen, Oxygen). If the first element is present more than once shown by a subscript, use a prefix that will indicate how many there are present (ex. mono, di, tri).
Next, name the second element in the compound using prefixes aswell if present more than once. These elements though, will end with -ide instead of their original name (ex. monoxide, dibromide, trichloride).
the concentration of magnesium inside a cell is 0.26%. the concentration of magnesium in the surrounding fluid is 0.18%. how could the cell obtain more magnesium?
The cell obtain more magnesium through Active transport.
What is Active transport?Active transport refers to the movement of molecules or ions across a cell membrane against the concentration gradient from a location of lower concentration to a region of higher concentration. Cellular energy is needed for active transport in order to achieve this movement. Adenosine triphosphate (ATP)-based primary active transport and electrochemical gradient-based secondary active transport are the two different forms of active transport.Active transportation uses include:
Bacterial phagocytosis by macrophages.Ca2+ ion expulsion from cardiac muscle cells.Amino acid movement via the intestinal epithelium in the human intestine.secretion of proteins from diverse cells, including enzymes, peptide hormones, and antibodies.White blood cell defense against invasive illnesses.Active transport employs cellular energy to move molecules against a gradient, polar repulsion, or other resistance, as opposed to passive transport, which relies on the kinetic energy and inherent entropy of molecules traveling down a gradientThe accumulation of large concentrations of substances that the cell requires, such as ions, glucose, and amino acids, is typically linked to active transport.To learn more about Active transport, refer to https://brainly.com/question/25802833
#SPJ1
a student separated the three compounds below using the acid base extraction procedure. he then followed is experiment with tlc using acetone hexanes mixture as mobile phase. what would you expect the student to see on tlc? would he run into difficulty with the tlc? explain
The student used an acid-base extraction method to isolate three compounds. In this lab, students will use solvents of different polarity (mobile phases) to determine the optimal separation of the pigments found in spinach extracts.
Mixtures are physical mixtures or additional materials that retain their inherent properties and come together in the form of a reaction, suspension, or colloid. Combinations are materials made from materials or other uniquely styled materials. It can be separated using physical methods. Examples include solutions of salt and water, mixtures of sugar and water, various gases, and air.
The mixture consists of one or more pure materials with different compositions. There are heterogeneous and homogeneous types of mixtures. Dissimilar combinations have visually distinguishable additives, while homogeneous combinations appear uniform throughout. Agglomerates are created by the mixing of two or more distinct substances in the body and can be separated from below into their original substances. A chemical reaction occurs when additional substances combine to form a completely new substance and cannot be separated back into the original substance.
Learn more about Mixtures here:
brainly.com/question/24647756
#SPJ4
Is "Honey with water" a homogeneous or heterogeneous mixture? explain why?
Answer: Homogenous mixture
Mixing honey with water will give you a homogenous mixture. It is uniform and even, as the honey particles are distributed equally throughout the water.
hope it helps, mark as brainliest.
Indicate the acid-base pairs for each of the following reactions:a) HClO3 + H2O <=> H3O + + ClO3-b) HSeO4 - + NH3 <=> NH4 + + SeO4 2-C) HCO3- + OH - <=> CO3 2- + H2OD) C5H5NH + + H2O <=> C5H5N + H3O+
Acid - base pairs.
Arrhenius theory, says, that acids are substances that dissociate in water to yield electrically charged atoms or molecules, called ions, one of which is a hydrogen ion (H+), and that bases ionize in water to yield hydroxide ions (OH−).
It is now known that the hydrogen ion cannot exist alone in water solution; rather, it exists in a combined state with a water molecule, as the hydronium ion (H3O+). In practice the hydronium ion is still customarily referred to as the hydrogen ion.
----------------------------------------------------------------------------------------------------------------
a) HClO3 + H2O <=> H3O + + ClO3-
HClO3 is the acid, ClO3- is the base (acid-base pair)
H2O acepts that H+ from the HClO3, and becomes H3O+
H2O is a base, H3O+ is the acid (acid-base pair)
----------------------------------------------------------------------------------------------------------------
b) HSeO4 - + NH3 <=> NH4 + + SeO4 2-
Here HSeO4 - can free one H so it would be the acid, and SeO4 2- is the base.
NH3 receives H+ from acid, so it is the base, and NH4+ is the acid.
---------------------------------------------------------------------------------------------------------------
c) HCO3- + OH - <=> CO3 2- + H2O
HCO3- gives away one H, so it is the acid, and CO3 2- is the base
(HCO3-,CO3 2-) acid-base pair.
OH- receives the H+ and becomes H2O. OH- is the base and H2O acid.
H2O can be acid and base, remember that. In this case it is the acid.
---------------------------------------------------------------------------------------------------------------
d) C5H5NH + + H2O <=> C5H5N- + H3O+
C5H5NH has the H, but on the right it doesn't, so it would be th acid. C5H5N- is the base.
H2O here is a base, because it receives the H+, and becomes H3O+ (the acid).
---------------------------------------------------------------------------------------------------------------
When you put aspirated spinach leaf disks in a beaker of sodium bicarbonate and place them in different colors of light, some disks float faster & more abundantly than others dependent on what color, if any, they were in. What made them able to float?.
The release of O₂( oxygen gas) from the process of photosynthesis is made disks to be able to float.
What is Photosynthesis?Photosynthesis can be described as the process in which green plants manufacture their food in the presence of sunlight which is trapped by the chlorophyll of the leaves. They are also called primary producers and they use compounds such as water and carbon dioxide.
The spinach leaf disks intake carbon dioxide from a sodium bicarbonate solution and sink to the bottom of a beaker. When the beaker is exposed to light, the disks use carbon dioxide gas and water to produce oxygen gas and glucose. Oxygen gas released from the leaves due to photosynthesis forms tiny bubbles that make the leaves float.
Read more about Photosynthesis, here:
brainly.com/question/19160081
#SPJ1
Due to the human extermination of prairie dogs in South Dakota, black footed ferrets became endangered in 1973. Only 18 ferrets were in existence in 1987. Rangers began a captive breeding program to increase their population numbers. The ferrets were later released in the Badlands and Wind Cave National Park in 2007.
Which type of conservation effort is this?
Responses
A. resource conservation
B. wildlife reintroduction
C.predator management
D.ecological introduction
The type of conservation effort which involves the captive breeding program to increase the population numbers of Ferrets is resource conservation and is denoted as option A.
What is Conservation?This is referred to as the process in which valuable resources which are present on earth such as plants, minerals etc are protected through various means by the appropriate authorities or individual.
Conservation helps to prevent dying out and extinction of species which is denoted in the captive breeding program to increase the population numbers of Ferrets so as to prevent the extinction of the animal hence option A was chosen.
Read more about Conservation here https://brainly.com/question/14840218
#SPJ1
In photosynthesis, carbon dioxide and water are converted to glucose and oxygen. during cellular respiration glucose and oxygen are converted to carbon dioxide and water. identify the true statement about the processes of photosynthesis and cellular respiration. answer a cellular respiration only occurs in animal cells b photosynthesis only occurs in animal cells c both processes involve a chemical change d both processes involve a physical change
During cellular respiration, oxygen and glucose are converted into water and carbon dioxide. The procedure produces ATP, which is converted into energy, carbon dioxide, water, and other byproducts.
Why is it called cellular respiration?Oxygen might be either present or absent while organisms are respiring. However, the activity is essentially known as "cellular respiration" so because cell seems to "respire" by consuming molecular oxygen (as an electron acceptor) and exhaling carbon dioxide (as an end product).
What is the purpose of cellular respiration?The process by which glucose is broken down in the presence of oxygen in the mitochondria of animals (animals and plants) to release energy in the form of ATP is referred to as cellular respiration.
To know more about Cellular respiration visit:
https://brainly.com/question/13721588
#SPJ4
Q2.
This question is about the reaction between hydrogen sulfide (H₂S) and oxygen.
The equation for the reaction is:
2 H₂S(g) + 3 O₂(g) → 2 H₂O(g) + 2 SO₂(g)
(a) What does H₂O(g) represent?
(b) Calculate the volume of oxygen required to react with 50 cm³ of hydrogen sulfide.
Volume=
cm³
Answer:
q2
Explanation:
Both the reactants are gases at STP.
Equation:
2H2S + 302 → 2SO2 + 2H2O
As per this equation 2 moles (2 x 22.4 L) of H2S
need 3 moles (3 x 22.4 L) of oxygen for their
complete oxidation.
So, volume of oxygen needed for 2.8 L of H2S =
(2.8 x 3 x 22.4)/(2 x 22.4) = 4.2 L (answer)
(a) H₂O(g) represents water in the gaseous state. It is produced as a product of the reaction between hydrogen sulfide (H₂S) and oxygen (O₂).
What is gaseous state?Gaseous state refers to a substance existing as a gas. When a substance is in the gaseous state, its particles are not closely packed together like in a solid or liquid state. Instead, they are spread out and move freely, filling the available space.
(b) To calculate the volume of oxygen required to react with 50 cm³ of hydrogen sulfide, we need to use the stoichiometry of the reaction. From the balanced equation, we can see that the molar ratio between hydrogen sulfide (H₂S) and oxygen (O₂) is 2:3.
Given: Volume of hydrogen sulfide (H₂S) = 50 cm³
Using the molar ratio, we can set up the following proportion: 2 mol H₂S / 3 mol O₂ = 50 cm³ H₂S / x cm³ O₂
To find the volume of oxygen, we can solve for x:
x = (50 cm³ H₂S * 3 mol O₂) / 2 mol H₂S
Now, we need to convert the obtained moles of oxygen to volume using the ideal gas law. Since the volume is given in cm³, we can assume that the temperature and pressure are constant at standard conditions (typically 0°C and 1 atm).
Using the ideal gas law equation: PV = nRT
Assuming constant temperature and pressure, we can rearrange the equation as: V = (n * R * T) / P
Substituting the values: V = (moles of O₂ * 22.4 L/mol) / (1 atm)
Calculate the moles of O₂ using the obtained value from the proportion.
Finally, convert the volume from liters to cm³ by multiplying by 1000.
Learn more about gaseous state at:
https://brainly.com/question/5496865
#SPj2
how does hybridization of atomic orbitals allow us to reconcile valence bond theory with vsepr theory? multiple select question. hybridization enables us to account for the number of singly-occupied orbitals required for bonding. hybridization enables us to predict the shapes of molecules. hybridized atomic orbitals produce new mixed orbitals that extend over the entire molecule. hybridization of atomic orbitals produces orbital shapes and spatial orientations that correlate to those predicted in vsepr theory.
Hybridization of atomic orbitals produces orbital shapes and spatial orientations that correlate to those predicted in VSEPR theory is how they are reconciled and is denoted as option D.
What is Hybridization?
This is a term in chemistry which refers to the process in which atomic orbitals mix to form a new atomic orbital. The orbital usually has a different shape and a similar energy during the mixing process.
It helps us to reconcile valence bond theory with vsepr theory by producing orbital shapes and spatial orientations that correlate to those predicted in VSEPR theory hence why option D was chosen.
Read more about Hybridization here https://brainly.com/question/22765530
#SPJ1
When a magnesium atom becomes a cation, the size of the radius ...
a) decreases because it lost electrons
b) increases because it gained electrons
c) increases because it lost electrons
d) decreases because it gained electrons
When a magnesium atom becomes a cation, the size of the radius decreases because it lost electrons (Option A)
Description of magnisium ionMagnesium is a divalent metal. It loses its valence electrons to form a stable octet electronic configuration.
Generally, the ions (or cations) of metals tends to be smaller than their atoms because they lose electrons to form ions.
Now, we shall consider the atom and the ion of magnesium to see the difference. Please see attached photo
Magnesium lose electrons to form ion (cations) as follow:
Mg -> Mg²⁺ + 2e
From the equation and the diagram, we can see that the ion of magnesium is smaller than its atom.
This is so because the magnesium atom has two electrons more than the magnesium ion.
Thus, we can say that the correct option is: decreases because it lost electrons (Option A)
Learn more about magnesium ion:
https://brainly.com/question/4111437
https://brainly.com/question/16756658
#SPJ1
help please!
What pressure will be required for neon at 30°C to have the same density as nitrogen at 20°C and 1.0 atm?
Can someone help me pls, i have like another 3 questions like this .-.
Answer:
1st box: Potential
2nd box: Electrical
3rd box: Kinetic
Explanation:
(1st box) Potential because the energy is stored and ready to act, which is definitely something desired for a battery.
(2nd box) Chemical, as discussed in the comments
(3rd box) Kinetic because the stored, potential energy is now 'acting' or 'in motion', causing it to be kinetic energy.
Answer:
Batteries store potential chemical energy
That the swith releases it into kinetic energy to light the room.
Explanation:
Energy comes in two main forms:
Kinetic energy which is energy of moving object or motion.2. Potential energy which is energy stored in object to be realesed to make effect. It can be stored in form of
Chemical energy. This can be in fuels or food taken by human body or the battery. Gravitational energy. This is due to the gravity and the force pulling the object from a height. Elastic energy. It is energy stored in rubber bands and spring balances.And there is much more....
Principle of conservation of energy says energy is not created nor destroyed but transferred from and object to another in different forms.
a) cite the major differences between activation and concentration polarizations. (b) under what conditions is activation polarization rate controlling? (c) under what conditions is concentration polarization rate controlling?
Activation polarization is occuring due to the evolution or deposition of some gases taking place in a redox reaction. Concentration polarization occurs between two electrodes when uneven distribution of ions occurs in the boundary.
What is polarization?Polarization is the process of charge separation between two species or the potential difference occurred due to the concentration gradient.
The two types of polarization occuring are activation polarization and concentration polarization. In activation polarization there occurs difference by the accumulation of gases.
For example the evolution of gases from the hydrogen electrode immersed in an electrolyte causes a polarization between the two electrodes.
In concentration polarization, there will be a concentration gradient of ions in the boundary of two electrodes occured due the electroanalytical reaction.
To find more about electrodes , refer the link below:
https://brainly.com/question/17060277
#SPJ1
please help with my chemistry homework thank you so much
Answer:
There are 2.2 moles of hydrogen.
Explanation:
The given information from the exercise is:
- Volume (V): 48.6L
- Temperature (T): 0°C (273K)
- Pressure (P): 1atm
1st) It is important to convert the temperature unit from °C to Kelvin:
[tex]0+273=273K[/tex]This first step is very important, because all the units must be at atm, L and Kelvin, before using the Ideal Gases Law formula.
2nd) Now to calculate the moles of hydrogen, we hae to replace the values of V, T and P in the Ideal Gases Law formula:
[tex]\begin{gathered} P*V=n*R*T \\ 1atm*48.6L=n*0.082\frac{atm*L}{mol*K}*273K \\ 48.6atm*L=n*22.4\frac{atm*L}{mol} \\ \frac{48.6atm}{22.4\frac{atm*L}{mol}}=n \\ 2.2moles=n \end{gathered}[/tex]R: is the gases constant, in its value is 0.082atm.L/mol.K.
So, there are 2.2 moles of hydrogen.
suppose you analyze a 32.4 g sample of bleach and determine that there are 3.06 g of sodium hypochlorite present. what is the percent of sodium hypochlorite in the bleach sample? type answer:
The percent of sodium hypochlorite in the bleach sample is calculated to be 9.44% if 3.06 g of sodium hypochlorite is present.
Percentage can be calculated by dividing a value by the total value and then multiplying the resultant by 100.
In this case, we can determine the percentage of sodium hypochlorite in the bleach sample by dividing the mass of sodium hypochlorite by the total mass of the sample and then multiplying the resultant by 100 as follows;
percent of sodium hypochlorite = (mass of sodium hypochlorite/mass of sample) × 100
As 3.06 g of sodium hypochlorite is present in 32.4 g of the sample of bleach, substituting these values in the equation as follows;
percent of sodium hypochlorite = (3.06 ÷ 32.4) × 100
percent of sodium hypochlorite = 0.0944 × 100
percent of sodium hypochlorite = 9.44%
Therefore the percentage of sodium hypochlorite in the bleach sample is calculated to be 9.44%.
To learn more about percentages; click here:
https://brainly.com/question/24304697
#SPJ4
name the three hardest substances that were tested. To what classes of solids do these substances belong? What general feature do these three types of solids have in common
Three hardest substances that were tested is aluminum, silicon dioxide and sucrose and the classes of solids do these substances belong is metallic type of solid and general feature do these three types of solids have in common are melting point and hardness
Hardest substance are that cannot be crushed, cut distorted or scrapped readily and the hardness of a substance is dictated by its crystalline structure which is regular and the three three hardest substances that were tested is aluminum, silicon dioxide and sucrose
Three substances classes of solid are also same the classes of solids these substances belong is metallic type of solid and general feature are also same of solids have in common are melting point and hardness metallic solid means metal is a solid in which hard in the nature shiny and smooth and so many metals are too hard
Know more about solid
https://brainly.com/question/27699151
#SPJ1
how to safely handle acids?
Always wear chemical splash goggles, chemical-resistant gloves and a chemical-resistant apron whenever using concentrated acids or acid solutions. Purchase dilute acids whenever possible Acid handling requires the use of latex gloves. Solvent and chemicals in miscellaneous category require the use of polythene gloves. Check the gloves for any pin-holes prior to use. Wash your hands before eating, even if gloves were used while handling the chemical.
i know it'sis a lot and it's a little messed up but can you handle it if you can and if it's right you mind giving me a brainliest?
Always wear chemical splash goggles, chemical-resistant gloves and a chemical-resistant apron whenever using concentrated acids or acid solutions
when GPR resin is setting, it gets hot
What type of reaction is this (exothermic or endothermic) and why?
What has happened in terms of energy transfer?
When GPR resin is setting, it gets hot. The type of reaction is this (exothermic or endothermic) is endothermic reaction. In terms of energy transfer energy is absorbed from its surrounding in form of heat.
Endothermic reaction occurs when heat is absorbed by the system from surrounding. while Exothermic reaction occurs when heat is released by the system in surrounding. In endothermic reaction , the system absorbed the energy from its surrounding in the form of heat.
Thus, When GPR resin is setting, it gets hot. The type of reaction is this (exothermic or endothermic) is endothermic reaction. In terms of energy transfer energy is absorbed from its surrounding in form of heat.
To learn more about endothermic reaction here
https://brainly.com/question/8713024
#SPJ1
balance this equation
___ H2 + ___ O2 → ___ H2O2
Answer:
1H2+1O2—>H2O2
Explanation:
Use the integer+1
How many grams of water are required to change the temperature of water from 25.0 oC to 35.0 oC when 4,000.0 joules of energy are released?
The mass of water required to change the temperature of water from 25.0°C to 35.0°C when 4,000 joules of energy are released is 95.6g.
How to calculate mass?The mass of a substance in a calorimetry procedure can be calculated by using the following formula:
Q = mc∆T
Where;
Q = quantity of heat absorbed or releasedm = mass of substancec = specific heat capacity∆T = change in temperatureAccording to this question, a sample of water is changed from 25.0°C to 35.0°C when 4,000 joules of energy are released. The mass of the water sample is as follows:
4000 = m × 4.184 × 10
4000 = 41.84m
m = 95.6g
Therefore, 95.6 grams is the mass of the water sample.
Learn more about mass at: https://brainly.com/question/2566525
#SPJ1
Why do we need to understand that reactions can happen at different speeds depending on the conditions?
We need to understand that reactions can happen at different speeds depending on the conditions to develop methods for production improvement.
The rate of any chemical reaction depends upon the nature of the reacting substances. Under the same conditions , reactions that appear similar have different rates of reaction. Chemical reaction proceeds in different speeds, depend on the various factors such as type of chemical transformation , temperature and other factors. the information about the speed of reaction is useful in large scale production.
Thus, We need to understand that reactions can happen at different speeds depending on the conditions to develop methods for production improvement.
To learn more about rate of reaction here
https://brainly.com/question/13440548
#SPJ1