We are given that–
Volume of Propane is = 389 cm³Density of Propane is = 19.3 g/cm³[tex]\qquad[/tex]________________________
As we know –
[tex]\qquad[/tex][tex] \pink{\bf\longrightarrow {Mass = Volume \times Density } }[/tex]
[tex]\qquad[/tex][tex] \bf\longrightarrow Mass_{(Propane)} = 389 \times 19.3 [/tex]
[tex]\qquad[/tex][tex] \bf\longrightarrow Mass_{(Propane)} = 7507.7 \: g[/tex]
Hence, Mass of Propane is 7507.7 g.[tex]\qquad[/tex]______________________
Mass of a substance is the amount of the constituting particles per unit volume. The mass of the [tex]\bold { 389\ cm^3}[/tex] of propane is 7.507 kg.
Mass of a substance is the amount of the constituting particles per unit volume. It is measured in kilograms (kg).
The formula for mass,
M = v x d
Where,
M - mass
v - volume = [tex]\bold { 389\ cm^3}[/tex]
d - density = 19.3 g/cm
Put the values in the formula,
M = [tex]\bold { 389\ cm^3}[/tex] x 19.3 g/cm
M = 7507.7 g
M = 7.507 kg
Therefore, the mass of the [tex]\bold { 389\ cm^3}[/tex] of propane is 7.507 kg.
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Which example accurately describes a solution?
Typical examples of solutions are
Alcoholic beverage (ethanol in water)GasolineWhat is a solution?A solution can be defined as a mixture (homogeneous) of two or more substances typically a solute in a solvent, the solvent is usually in greater quantity and the substance or substances present in lesser amounts are the solutes.
Other good examples of a solutionCommon examples of solutions are sugar in water and salt in water solutions, soda water,
Furthermore, solutions can be homogenous or heterogenous
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What is one element that is not found in the human body, air, or the universe? Brainliest to whoever gets it right! PLEASE HELP! :) 20 points for the question also! :D
Answer:
Technetium. It is only found in the stars.
Explanation:
Sorry, but thats all I could find for tou
The are many elements which are not present in human body. But almost all the discovered elements are there in the universe. But the one which is not present in earth and air is technetium
What is an technetium ?Technetium is the first synthesized element by man in 1937. Technetium has no stable isotopes and it is not found in earth. But it is present in stars. However, rare earth elements such as promethium , francium etc. can be prepared or observed from uranium ores.
There are many elements especially some actinides and lanthanides which are not present in earth naturally existence on starts and other planets.
Human body is made of various elements including carbon, oxygen, nitrogen, various metals like iron, zinc etc. Various enzymes contains different elements but the number of elements which are in the surroundings of human and not inside is larger.
Therefore, all the discovered elements are found in the universe and some them are not present in earth.
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report the elements half life. if we start with 100g of your element (platinum) how long will it take to have 6.26g?
Answer:
did u get the answer yet
Explanation:
NO LINKS
Select the correct answer.
In which situation is chemical energy being converted to another form of energy?
A.
a lamp plugged into the electric grid
B.
a fluttering flag
C.
a floating wooden log
D.
a burning candle
How many moles are in 1.93 x 10^24 atoms of gold
Answer:
We know that 1 mole equals to 6.02 x 10^23 atoms (which is Avogadro's number), so to get to atoms from moles, you would divide the atoms of gold by Avogadro's number
(1.93 x 10^24) / (6.02 x 10^23)
= 3.2 mol of gold (rounded)
It measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 3.21 moles of gold are in 1.93 x 10²⁴atoms of gold.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. Mole is directly proportional to the given number of atoms.
Given number of atoms of gold= 1.93 x 10²⁴atoms
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mole of gold =given number of atoms of gold ÷ 6.022×10²³(Avogadro number)
Substituting all the given values, we get
Mole of gold = 1.93 x 10²⁴atoms ÷ 6.022×10²³(Avogadro number)
Moles of gold=3.21 moles of gold
Therefore, 3.21 moles of gold are in 1.93 x 10²⁴atoms of gold.
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What would be the partial pressure of nitrogen, PN2, in a room in which the total air pressure was 0.987 atm?
This problem is providing describing a room in which air has a total pressure of 0.987 atm and the partial pressure of nitrogen is asked, turning out to be 0.746 atm.
In such a case, we can start by looking at the provided table, which shows the composition of dry air in mass basis, which means we must convert the composition of nitrogen to mole fraction by knowing that the average molar mass of air is 28.9647 g/mol, and thus, we infer that the mole fraction of nitrogen in air is about 0.755 according to:
[tex]x_{N_2}=\frac{0.781*14.0067g/mol*2}{28.9647g/mol} =0.755[/tex]
Then, we recall the Dalton's law version that relates total pressure, partial pressure and mole fraction written for nitrogen:
[tex]P_{N_2}=x_{N_2}P[/tex]
Finally, we plug in the previously calculated mole fraction and the total pressure of air to obtain:
[tex]P_{N_2}=0.755*0.987 atm\\\\P_{N_2}=0.746atm[/tex]
Learn more:
(Gas laws) https://brainly.com/question/8511562(Dalton's law) https://brainly.com/question/14119417Examples of errors in colorimetry experiments
Answer:
The lack of accuracy and underestimation of absorbance readings obtained from the colorimeter can be contributed to many experimental factors. One plausible error is from the imperfection of the absorber, in that it may not completely absorb the stray light passing by the perimeters of the photoresistor.
Explanation:
In practice there are other sources of error, such as environmental effects on photometer and sample, temperature, line voltage fluctuations, vibrations, contamination, or heating of the sample by the photometer. All these factors may impair the measured result, and ways and means are known to test and eliminate them.
carbondiooxide does not support in burning but mg burs in it why.?
To keep burning, fires require oxygen. Carbon dioxide is used in certain fire extinguishers to put out flames. Explanation: Because magnesium is higher on the reactivity scale than carbon, it is more reactive and eliminates oxygen from carbon dioxide (to give carbon and magnesium oxide).
Pls
Due today pls help asfast as possible
Answer: D. 10,000 km = Exosphere; 690 km = Thermosphere; 85 km Mesosphere; 50 km = Stratosphere; 20 km = Troposphere
2. True
3. True
4. True
5. True
What state of matter has a defined volume but undefined shape?
Question 6 options:
gases
liquids
solids and liquids
liquids and gases
Answer:
Liquids
Explanation:
They have a certain volume but they take the shape of their container
Liquids have a definite volume when poured into a container. What does this mean?
Answer:
A solid has definite volume and definite shape, a gas has neither definite volume nor definite shape, and as said in the question, a liquid has a definite volume but no definite shape.
What this means is that even though liquid molecules can slide past each other and move to fill up the space they are in (this means that liquids have no definite shape), they keep their volume. That is, liquids have consistent, unchanging volume.
Hopefully that's helpful! :)
what are two possible ways to show the structure of ch4?
Answer: Two possible ways to show the structure of CH4 are its electron dot diagram or structural formula. CH4 or methane's molecular formula is given as CH4. The structural formula is a graphical representation of a chemical compound.
Answer:
using electron dot diagrams or structional formula
two step mole conversions, giving brainliest
Answer:
Our process will be to change the mass of NO2 to moles by dividing by the molar mass, and then we multiply the number of moles with Avogadro's number (6.02 x 10^23)
Molar mass of NO2 = (14) + (16)x2 = 46g/mol
45.8/46 = 0.99 or just 1 mole when you round it.
Now just multiply the moles with Avogadro's number
1 x (6.02 x 10^23)
= 6.02 x 10^23 molecules of NO2 reside in 45.8g of NO2
how many fluid ounces can i take on a plane united
B. Number the digestive process in the correct sequence. Write A-E on the blank 21. Food moves into the small intestine. 22. Food is stored and further broken down by acid and powerful enzymes 23. Your saliva helps break down what you're eating and turn it into chemicals called enzymes. 24..Food moves through your esophagus. 25. Anything left in the small intestine moves into the large intestine
Answer:
21. D (Food moves into the small intestine.)
22. C (Food is stored and further broken down by acid and powerful enzymes.)
23. A (Your saliva helps break down what you're eating and turn it into chemicals called enzymes.)
24. B (...Food moves through your esophagus.)
25. E (Anything left in the small intestine moves into the large intestine.)
Explanation:
Food first enters the mouth where it is chewed and broken down by salivary amylase. Then, it is swallowed, moving down the esophagus to the stomach where it is stored and further broken down by acids and enzymes. And, these broken down food molecules moves into the large intestine.
how many grams are in 4.07x10^15 molecules of calcium hydroxide
There are 5.01 × 10-⁷grams in 4.07 x 10¹⁵molecules of calcium hydroxide.
HOW TO CALCULATE MASS:
The mass of a substance can be calculated by multiplying the number of moles in the substance by its molecular mass.
However, given that the number of molecules in calcium hydroxide is 4.07 x 10¹⁵molecules, we need to calculate the number of moles in Ca(OH)2 as follows:
no. of moles of Ca(OH)2 = 4.07 x 10¹⁵ ÷ 6.02 × 10²³
no. of moles = 0.676 × 10-⁸
no. of moles = 6.76 × 10-⁹ moles.
Molar mass of Ca(OH)2 = 74.093 g/mol
Mass of Ca(OH)2 = 74.093 × 6.76 × 10-⁹ moles
Mass = 5.01 × 10-⁷grams.
Therefore, there are 5.01 × 10-⁷grams in 4.07 x 10¹⁵molecules of calcium hydroxide.
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Write method of manufacturing of oxygen gas from liquid air
Answer:
cryogenic distillation process
Explanation:
Cryogenic distinction between carbohydrates and harmon process.
Which model of the atom is thought to be true?
A. Protons, electrons, and neutrons are evenly distributed throughout the volume of the atom.
B. The nucleus is made of protons, electrons, and neutrons.
C. Electrons are distributed around the nucleus and occupy almost all the volume of the atom.
D. The nucleus is made of electrons and protons.
Its A. Explanation:I just know
when an electron is acquired by a neutral atom, the energy change is called
Answer:
when an electron is acquired by a neutron atom, the energy change is called its electron affinity
When an electron is added to a neutral atom to create a negative ion, the energy of the atom changes (in kJ/mole). This is how electron affinity is defined. Alternatively put, the possibility of the neutral atom receiving an electron.
What is electron affinity ?The amount of energy released when an electron binds to a neutral atom or molecule in the gaseous state to produce an anion is known as the electron affinity of an atom or molecule.
Although there is a slight distinction between the two, electron gain enthalpy is occasionally also referred to as electron affinity. The amount of energy released when an electron is added to a single gaseous atom is known as the electron gain enthalpy.
The amount of energy released when an atom receives an additional electron is known as its electron affinity. The gaseous state is when electron affinities are measured. On the periodic table, electron affinities tend to shift from negative to positive as we move from left to right.
Thus, when an electron is acquired by a neutral atom, the energy change is called as electron affinity.
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12. Draw the dot diagram for a molecule of P2
[show your work and draw a box around your answer]
Explanation:
download the app topper
[tex]\rule{2000pt}{1000000pt}[/tex]
mamama
why do solids maintain their shape whereas fluids do not
PLEASE HELP I DON´T KNOW WHAT THE DIFFERENCE BETTWEEN THE TWO IS!
What is the difference between a product and a reactant.
Answer:
A reactant is a substance that is present at the start of a chemical reaction. A product is a substance that is present at the end of a chemical reaction.
Explanation:
Sasha did an experiment to study the solubility of two substances. She poured 100 mL of water at 20°C into each of two beakers labeled A and B She put 50 g of
Substance A in the beaker labeled A and 50 g of Substance B in the beaker labeled B. The solution in both beakers was stirred for 1 minute. The amount of substance
left undissolved in the beakers was weighed. The experiment was repeated for different temperatures of water and the observations were recorded as shown.
Experimental Observations
Mass of Undissolved Substance at Different Temperatures (gram)
20°C
40 °C
60°C
80 °C
Substance
А
12
11
9
8 8
B
45
40
34
31
Part 1: Which substance has a higher solubility?
Part 2: Explain your answer for Part 1
Answer:
Answer temperatures gram is correct because there is more of a mass of numbers and the numbers are higher. (don't really know this subject, just guessing, hope this helped.)
The substance A has higher solubility then substance B because the higher the temperature the easier the substance will dissolve.
What is solubility?The word solubility is defined as the ability of a substance, the solute, to form a solution with another substance, the solvent.
It can also be defined as a property that allow sugar molecule to dissolve.
It can be defined as at a given temperature, the amount of solute that can dissolve in a given amount of solvent.
In this reaction, increasing the pressure and temperature results in increased solubility. An increase in pressure causes more gas particles to enter the liquid, lowering the partial pressure.
For exothermic reaction the temperature increases with decrease in solubility and for endothermic reaction the temperature decreases with increase in solubility.
Thus, the substance A has higher solubility then substance B because the higher the temperature the easier the substance will dissolve.
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How far do you think a plate can move in one day?
Which statement best describes what happens to the stability of hydrogen and oxygen atoms when they form bonds in a water molecule?
Answer:
It's c
Explanation:
Because I've checked
What are the molecular formulae of the following compounds ?
Hydrochloric acid, sulphuric acid, sodium chloride, glucose, methane.
Let's see
[tex]\\ \sf\longmapsto Hydrochloric\:acid=HCL[/tex]
[tex]\\ \sf\longmapsto Sulphuric\:acid=H_2SO_4[/tex]
[tex]\\ \sf\longmapsto Sodium\: Chloride=NaCl[/tex]
[tex]\\ \sf\longmapsto Glucose=C_6H_12O_6[/tex]
[tex]\\ \sf\longmapsto Methane=CH_4[/tex]
.
Answer:
the molecular formulae of the following compounds are:
Hydrochloric acid: HCl
Sulphuric acid:[tex]H_2SO_4[/tex]
sodium chloride: NaCl
glucose:[tex]C_6H_{12}O_6[/tex]
methane:[tex]CH_4[/tex]
Explanation:
PLEASE HELP
2.How many atoms are in 3.35 moles of Aluminum?
3.How many moles of CO2 gas are in a 101.25 L container filled with CO2 gas?
4.What is the mass of 13.7 moles of N2 gas?
Answer:
2: 2.02 x 1024 atoms
3: 4.5201 atoms
4: 384 g/mol
Explanation: I'm in your class
BRAINLIEST TO FIRST RIGHT ANSWER
Students were investigating heat transfer by conduction and they set up the simple experiment you see here. They utilized three spoons made of different materials: the specific heat capacity of each material was recorded in the students' data table. Each spoon was placed in a pot of hot (90°C) water and a pat of butter was placed on the handle of each spoon. The butter melted first on the tin spoon and in about the same amount of time on the plastic and wood spoons. Based on the data table and the experimental results select ALL of the conclusions that are appropriate.
A) Conduction occurred more readily in the tin due to its lower specific heat
capacity
B) Heat transfer via conduction occurred from the hot water to the spoons
and then to the butter,
C) When in contact with hot water, there was no transfer of kinetic energy
through the wood or plastic
D) The atoms in the tin spoon vibrated and collided at a greater rate thon
those in the wood or plastic spoons
E) In all three cases energy s transferred from the faster moving hot water
molecules to the slower moving molecules in the spoon
Answer:
the Answer is A B D
Explanation:
the cunduction in the spoons are equal to all the following answers
Conduction occurred more readily in the tin due to its lower specific heat capacity, Heat transfer via conduction occurred from the hot water to the spoons and then to the butter, The atoms in the tin spoon vibrated and collided at a greater rate thon those in the wood or plastic spoons. Thus option A,B, D are correct.
What is specific heat ?
Specific heat can be measured as the quantity of heat required to increase the temperature of one gram of a substance by one degree Celsius.
The units of specific heat are represented as calories or joules per gram per Celsius degree such as the specific heat of water is 1 calorie per gram per Celsius degree
Specific heat capacity= Heat quantity/ mass × change in temperature.
If Q is the quantity of heat in joules, M is the mass of substance heated,
If ∆O is the change in temperature in Kelvin, Then Q= MC∆O, C is a constant called Specific heat capacity. Therefore, making C the subject of formula:
C= Q /M∆O
Thus option A,B, D are correct.
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what is the nature of the p-o bond in phosphorus pentoxide (p2o5)?
Answer:
the nature of the bond is covalent.
covalent bonds are bonds between 2 NON-METAL elements. since phosphorus and oxygen are both non-metals, the bond formed between them is covalent.
hope this answers your question!
Do cells have atoms?
Answer:
Ye? everything is made up of atoms so sure