Answer:
number of moles of NaSO4 = [tex]\frac{mass of compound}{molar mass of compound}[/tex]
= [tex]\frac{35.9}{2(23) + 32 + 4(16)}[/tex]
= 0.253 mol (3 s.f.)
0.253 mol = [tex]\frac{number of atoms}{avogadro's number}[/tex]
= [tex]\frac{number of atoms}{6.02(10^{23} )}[/tex]
thus, the number of atoms = 0.253 x [tex]6.02(10^{23})[/tex]
= 1.52 × [tex]10^{23}[/tex]
voodoo money voodoo money voodoo money?
Answer:
voodoo voodoo voodoo
In the Periodic Table below, shade all the elements for which the neutral atom has an outer electron configuration of ms^2nd^2, where n and m are integers, and m= n+1.
Answer:
Na+e-1=Na
Explanation:
dfh low so to homework all no lol Show
A person is told to take 1.25 mg of vitamin D daily. How many 0.250 mg tablets should this person take
5 tablets must be taken by the patient each day.
In a randomized clinical experiment with nursing home residents, the effects of equal oral vitamin D3 doses of 600 IU/day, 4200 IU/week, and 18,000 IU/month on vitamin D status were compared. The most efficient dosage was a daily dose, followed by a weekly dose and a monthly dose. It is believed that vitamin D status is affected equally by equivalent daily, weekly, or monthly doses of vitamin D3. A randomized clinical experiment including nursing home residents looked at this.
we know that for 1 day we need to divide 1.25 by 0.250
so, the answer will be 5 pills per day.
Learn more about Vitamin D here-
https://brainly.com/question/15080220
#SPJ9
Belching (burping) cows give off much of the methane, a greenhouse gas, from raising farm animals. Now researchers are investigating a way to reduce the greenhouse gas that is burped by cows.
In one study, scientists fed a group of dairy calves (which are cows that produce milk) a methane-blocker chemical. Sensors at feeding stations measured methane in the cows’ gas while the animals were nearby. That allowed the team of researchers to estimate the methane being belched (burped) out each day.
Over their first year of life, the treated cows, which received the methane-blocker chemical, released about ten percent less methane than the group of cows not given the chemical.
What can you infer or conclude based on the evidence from the passage?
*Your response should include the evidence to support your conclusion.
Cows and other ruminants are significant producers of the greenhouse gas methane—contributing 37 percent of the methane emissions resulting from human activity.
What is greenhouse gas?Greenhouse gases (also known as GHGs) are gases in the earth's atmosphere that trap heat. During the day, the sun shines through the atmosphere, warming the earth's surface. At night, earth's surface cools, releasing heat back into the air. But some of the heat is trapped by the greenhouse gases in the atmosphere.
While carbon dioxide is typically painted as the bad boy of greenhouse gases, methane is roughly 30 times more potent as a heat-trapping gas. As temperatures rise, the relative increase of methane emissions will outpace that of carbon dioxide from these sources, the researchers report.
The cow's ramen is like a large fermentation vat. More than 200 different bacteria and 20 types of protozoa help the cow to utilize fibrous feed stuffs and non-protein nitrogen sources. Bacteria adhere to the feed and gradually digest the fermentable material.“You can probably reduce methane by about 20-25% by altering diet,” he says.
One study by researchers at the University of California, Davis, estimated it might be possible to reduce global methane emissions from cows by 15% by changing their diet.
Thus, this evidence support the passage.
To learn more about greenhouse gas, refer to below link:
https://brainly.com/question/4509458
#SPJ2
The ____ chemist would study how fast nitrogen and hydrogen form
Answer:
The Bio chemist would study how fast nitrogen and hydrogen form ammonia.
Explanation:
calculate the volume in (L) of 1.13x10^5 grams of liquid sodium which has a density of 0.929g/cm3
The volume of the liquid sodium is 121.64 L
What is density?The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
With the above formula, we can obtain the volume of the liquid. Details below
How to determine the volume of the sodium liquidMass of liquid = 1.13×10⁵ gDensity of liquid = 0.929 g/cm³Volume of liquid =?Density = mass / volume
Thus,
Volume = mass / density
Volume of liquid = 1.13×10⁵ / 0.929
Volume of liquid = 121636.17 cm³
Divide by 1000 to express in liter
Volume of liquid = 121636.17 / 1000
Volume of liquid = 121.64 L
Learn more about density:
https://brainly.com/question/952755
#SPJ1
Water (2450 g ) is heated until it just begins to boil. If the water absorbs 5.35×105 J of heat in the process, what was the initial temperature of the water?
Express your answer with the appropriate units.
The initial temperature of water is 47.8⁰C
In this case, the challenge is to determine how much heat is required to bring a particular sample of water from its original temperature to its boiling point.Given,
mass of water is 2450g
absorbed heat is 5.35×105 J
we have to find out initial temperature
First Calculate the change in temperature when 5.35×10^5 J of heat is provided to 2450g of water.
q = m . c . ∆T
q is amount of heat gained
m is the mass of water
c is the specific heat of the substance
∆T is change in temperature
Specific heat of water is 4.18 J/g⁰C
∆T = q / m . c
= 5.35×10^5 / 2450 × 4.18
= 52.2⁰C
Now we know that the final temperature of the water is
100⁰C and that this final temperature is 52.2⁰C
is higher than the initial temperature of the water.
So by, ∆T = T(f) - T(i)
T(i) = T(f) - ∆T
T(i) = 100⁰C - 52.2⁰C
= 47.8⁰C
Therefore, initial temperature of water is 47.8⁰C
Learn more about specific heat here:
https://brainly.com/question/27991746
#SPJ9
A structural model of adrenaline is shown below. How many hydrogen atoms
are in adrenaline?
О A. 16
B. 3
О с. 13
D. 4
ОН
pre
ОН
НО
The number of hydrogen atoms in a molecule of adrenaline is 13 (option C).
What is adrenaline?Adrenaline is a hormone naturally produced in human body, however, it is a chemical compound made up of atoms of different elements.
The elements that make up a molecule of adrenaline are as follows:
CarbonHydrogenOxygenNitrogenAccording to this question, a structural configuration of adrenaline is attached. The number of atoms of the elemental constituent of adrenaline is given below:
9 Carbon atoms 3 Oxygen atoms1 Nitrogen atoms13 Hydrogen atomsTherefore, the number of hydrogen atoms in a molecule of adrenaline is 13.
Learn more about adrenaline at: https://brainly.com/question/3462016
#SPJ1
Question 5 (1 point) Which statement is NOT TRUE about molecules and compounds? a All molecules and compounds are made of atoms. b Compounds are made up of the same type of atom. c All molecules are compounds. d Molecules are made up of two or more chemically bonded atoms.
All molecules are not compounds. Option C.
What are compounds?A compound is a substance made from two or more atoms of different elements that are linked together by bonds. The bond could be an ionic, covalent, metallic, or hydrogen bond.
A molecule, on the other hand, is a group of atoms, the same or different, chemically bonded together and represents the smallest fundamental unit that can participate in chemical reactions.
Going by these two definitions, one can conclude that while all compounds are molecules, not all molecules are compounds. If the group of atoms that bond together is chemically identical, a molecule is formed but not a compound.
More on compounds can be found here: https://brainly.com/question/13516179
#SPJ1
Can anyone help me with this?
Answer:
Student A's Date was more precise.
Explanation: Her answers are closer together whereas student B's answers are further apart in numbers.
Antifreeze has a density of 0.79 g/mL. What mass of antifreeze, in grams, is required to fill a 2.5
gallon car radiator?
Note: 1 gallon = 3.785
The mass of antifreeze required to fill a 2.5 gallon car radiator is
Since, 1 gallon = 3.785 L
2.5 gallon = 9.4625 L
Given,
Gasoline = 9.4625 L x 1000 mL/L
= 9462.5 mL
Density = 0.79 g/mL
Mass = Density x volume (density = mass )
Mass = 0.79 g/mL x 9462.5 mL volume
Mass = 7475.37 g
Therefore,
Mass of antifreeze, in grams = 7475.37 g
To learn more about antifreeze,
brainly.com/question/2770534
#SPJ1
Determine the volume of hydrogen gas needed to react completely with
5.00 L of oxygen gas to form water,
The volume of hydrogen needed to react with 5.00 L of oxygen based on the mole ratio is 10.00 L.
What volume of hydrogen gas is needed to react with 5.00 L of oxygen?The volume of hydrogen gas is needed to react with 5.00 L of oxygen is determined from the mole ratio of the reactants as shown in the equation of reaction below:
Equation of reaction: 2 H₂ + O₂ → 2 H₂O
Mole ratio of hydrogen to oxygen = 2 : 1
Moles of gases occupies equal volume
Therefore, Volume ratio of hydrogen to Oxygen = 2 : 1
Volume of hydrogen needed to react with 5.00 L of oxygen = 5.00 * 2
Volume of hydrogen needed to react with 5.00 L of oxygen = 10.00 L
In conclusion, the volume of hydrogen required is obtained from the mole ratio of hydrogen and oxygen in the reaction.
Learn more mole volume of gas at: https://brainly.com/question/23826637
#SPJ1
How many particles are in 64 grams of Oxygen?
Answer:
4
Explanation:
oxygen has molar mass of 16 g/mol. 64 grams / 16 g/mol = 4mol
PLEASE HELP ILL MARK BRAINEST!!! 35 POINTS!! THANK YOU
This chart above compares the reaction rate of a naturally occurring chemical reaction vs. the same reaction when an enzyme is involved.
a. Compare the differences between the two reactions, but also note what they have in common.
b. Explain the role the enzyme plays in the second reaction
c. Explain what the three bumps in the second reaction means and why the original reaction only has one bump.
In the image given, the difference in the activation energy is observed on addition of a catalyst in the same reaction.
Activation energy is the minimum initial energy needed for a reaction to start. It is denoted as [tex]E_a[/tex].
a) The difference between the reactions is that on addition of a catalyst, the activation energy is reduced to form the same product.
The similarity is that these peaks are basically the transition states where the energy is highest, and the reactant molecules are highly unstable and immediately get converted to the products.
b) Enzymes in the second reaction are the catalysts which increase the rate of the reaction and reduce the activation energy required for the reaction to happen. Not only do the enzymes reduce the activation energy, but they also introduce a multiple energy reaction pathway which must be fulfilled in order to form the products.
c) The second reaction is a multi-step reaction and occurs in a series of collisions, where each collision produces an intermediate molecule which collides further until the final product molecules are formed. Thus, each collision step has its own activation energy peak.
The original reaction has only one activation energy peak as the reactants collide once and form the products immediately thereby consuming a lot of energy.
Learn more about Activation energy here:
https://brainly.com/question/9967920
#SPJ9
List three possible reasons why Zara cannot see any cells.
Zara is examining some animal cells on a slide using a microscope. She is aware that there are animal cells on the slide, but she is unable to see any cells when using the microscope. Give three reasons why Zara might not be able to notice any cells.
Understanding organelles has been greatly aided by microscopes. Most organelles cannot be seen using a light microscope, and those that can (such as the nucleus, mitochondria, and Golgi) cannot be studied in detail because of their size, which is near to the light microscope's resolution limit.
The other cell organelles are too tiny and do not adhere to the dye to be visible under a lab microscope.
Learn more about microscope here:
https://brainly.com/question/18661784
#SPJ9
Convert the following temperature to kelvin:a) 113°C, the melting point of sulfur,b) 37°C, the normal body temperature,c) 357°C, the boiling point mercury.
The temperature to kelvin at 113°C is 386.15 K, at 37°C is 310.15 K and at 357°C is 630.15 K.
Equation :To find Kelvin use formula,
Kelvin = 273.15 + degree Celsius
So,
(a) The melting point of sulfur at 113 degree Celsius
273.15 + 113 = 386.15 K
(b) The normal body temperature at 37 degree Celsius
273.15 + 37 = 310.15 K
(c) The boiling point of mercury at 357 degree Celsius
273.15 + 357 = 630.15 K
What is temperature?Temperature is a measure of hotness and coldness that can be expressed on a variety of scales, including Fahrenheit and Celsius. Temperature indicates the direction in which heat energy will flow from a hot body to a colder body to a lower temperature.
The total energy of the molecular motion inside the object is represented by the heat open object. Temperature is a measure of the thermal energy or average heat of a substance's molecules.
To know more about motion visit :
https://brainly.com/question/22810476
#SPJ9
Which of the following are mixtures?
What is the number of C atoms in 0.247 mol of C.
The number of C atoms in 0.247 mol of C is 1.48 X 10²³ .
The number of C atoms in 1 mol of C is 6.02 X 10²³, which is also called Avogadro’s number .
so, The number of C atoms in 0.247 mol of C is _
0.247x6.02x10²³= 1.48 X 10²³.
learn more about Avogadro’s number here-
https://brainly.com/question/1513182
#SPJ9
Which statements describe the nature of science? (Select 5)
1. Scientists engage in peer reviews to avoid bias.
2. Science is a blend of logic and innovation.
3. Scientific ideas are not durable and cannot adjust to change as new data is collected.
4. Science is not observational .
5. Science is a complex social endeavor.
6. Natural world is understandable.
7. Scientists try to remain objective.
Answer:
2
Explanation:
Scientists engage in peer reviews to avoid bias, Science is a blend of logic and innovation and Scientific ideas are not durable and cannot adjust to change as new data is collected. The correct options are 1,2, and 7.
Peer reviews are used by scientists to ensure objectivity and reduce prejudice in their study. To create original ideas and hypotheses, scientists need both logical reasoning and creative thinking.
As scientists frequently interact, exchange ideas, and build on one another's work, it is a complex social endeavour. Understanding and making sense of the natural world is the central tenet of science.
Finally, scientists separate their personal beliefs from empirical evidence in order to stay as objective as possible in their research.
Thus, Scientists engage in peer reviews to avoid bias, Science is a blend of logic and innovation and Scientific ideas are not durable and cannot adjust to change as new data is collected. The correct options are 1,2, and 7.
Learn more about Nature, refer to the link:
https://brainly.com/question/30406208
#SPJ7
How many moles of each type of atom are in 1.0 mol of K2Cr2O7?
1.0 mol of K₂ Cr₂07 contains 2 mol K, 2 mol per 7 mol 0.
One mole of atoms of any element carries 6.022 X 1023 atoms, regardless of the kind of detail. Use the periodic table to determine the molar mass of the element. Divide the given mass in grams by the molar mass to locate the range of moles. Multiply the number of moles via Avogadro's wide variety to attain the variety of atoms. There are 24 atoms in a single molecule of C6 H12 06. This chemical compound has 6 atoms of carbon, 12 atoms of hydrogen, and six atoms of oxygen. this is a total of 24 atoms.
The mole is the quantity of substance of a system that includes as many fundamental entities as there are atoms in zero. 012 kilogram of carbon 12 its symbol is mol To discover the number of moles in a sample, simply weigh it and divide the weight by way of the molecular weight. The quotient is equal to the variety of moles. The number of atoms or different particles in a mole is the same for all substances divided by the mass of the substance in grams via its molecular weight. this could provide you with the range of moles of that substance that are inside the targeted mass.
Learn more about An atom here:-https://brainly.com/question/17545314
#SPJ9
PLS HELP ASAP
(50 POINTS)
What is the chemical formula for ethanol according to this
illustration?
Answer: The answer is D [tex]C_{2} OH_{6}[/tex]
Explanation: Because I just know by counting the letters to see how many of each one.
Answer:
C2OH6
Explanation:
The figure shows the presence of...
Two Carbon (C)
One Oxygen (O)
and Six Hydrogen (H)
We need to make sure we select the option that best represents all of the elements shown in the figure.
Because option 4: C2OH6 is the only chemical formula to include all the elements displayed, it is the best answer.
The periodic table is aanged by various patterns is there a pattern with regard to ionic charge? In three to five sentences, explain your reasoning and provide specific examples.
Answer: As you move down the column in the periodic table the ionic charge increases.
Explanation: This is because the effective nuclear charge (Z_sub_eff) provides a shielding constant so that the nuclear charge from the protons cannot interfere with the negative nuclear force of the electrons.
Yes, ionic charge patterns exist. Elements in the same group often share similar charges due to common valence electron configurations.
Indeed, a pattern emerges in terms of ionic charges within the periodic table. Elements within the same group (vertical columns) often exhibit similar ionic charges due to sharing common valence electron configurations.
For instance, Group 1 elements tend to form +1 cations (e.g., Na⁺, K⁺) by losing their single valence electron, while Group 2 elements form +2 cations (e.g., Mg²⁺, Ca²⁺) by losing two valence electrons. Similarly, elements in Group 17, known as halogens, commonly form -1 anions (e.g., F⁻, Cl⁻) by gaining one electron to achieve a stable electron configuration.
This recurring trend can be attributed to the desire of atoms to achieve a full valence shell, either by losing or gaining electrons, leading to predictable ionic charges within specific groups of elements.
To learn more about electron configurations here
https://brainly.com/question/13497372
#SPJ3
What law says the total amount of
substance at the beginning of a
reaction must match the amount of
substance at the end of the reaction?
A. Law of Conservation of Energy
B. Law of Conservation of Moles
C. Law of Conservation of Heat
D. Law of Conservation of Mass
Answer:
d) law of conservation of mass
Explanation:
Calculate the formula mass of sodium sulfate decahydrate, Na2SO4⋅10H2O , in atomic mass units (amu or u).
Answer:
Na
2
SO
4
.10H
2
O
=(2×23)+32+(4×16)+(10×18)
=46+32+64+180
=322
4. In what region of the periodic table are you likely to find elements that form more than one stable
ion?
Answer:
in the middle region of the periodic table, where the transition metals are
aka between Group II and III
Please and thank you
Answer:28, 34, 85, 6.6
Explanation:
Plan an investigation to explore the relationship between properties of substances and
the electrical forces within those substances.
Approximately 50 minutes
I
What can properties of substances tell us about the electrical forces within those
substances?
In this activity, you will plan and conduct an investigation to compare a single property
across several substances. You must select a measurable property, such as boiling point
or surface tension. After your investigation, you will compare the results and use your
data to make inferences about the strength of the electrical forces in each substance you
tested.
The physical and chemical properties of a compound is dependent upon its bond strength. Physical properties such as boiling, melting point etc . increases with bond strength. Solubility decreases with increase in bond strength.
What is bond strength?The bond strength of a molecule or compound is the measure the energy to break or form the bond. That it tells how much strong the bond is. It directly proportional to the bond order.
Boiling point of a compound is the temperature at which the compound changes from liquid to gas state. Melting point is the temperature at which a to liquid form. All these phase changes are dependent on the electrical force within the molecules.
As the electrostatic force of attraction increases, more energy have to be applied to it to weaken the bonds and make the molecules apart. Therefore, the boiling point and melting point increases.
Similarly the molecules with higher bond strength have less solubility at normal conditions. The reactivity of molecules decreases as their bond strength increases since more energy needed to break the bonds.
To find more bond strength, refer here:
https://brainly.com/question/20590677
#SPJ1
I
Based on the information below, which of the following are atoms of the same element? (mark all that apply)
Atom A
Atom B
Atom C
8 protons
8 neutrons
8 electrons
10 protons
10 neutrons
10 electrons
8 protons
10 neutrons
8 electrons
end
Based on the information below . The atoms of the same element are Atom A and Atom C .
Atoms of same element have the same atomic number. so the number of protons and electron are same but they have different atomic masses called as Isotopes. so, the atoms having different number of neutron will have different masses.
In the given case ,
Atom A Atom B Atom C
8 protons 10 protons 8 protons
8 neutrons 10 neutrons 10 neutrons
8 electrons 10 electrons 8 electrons
so, In Atom A and Atom C , the number of protons and electrons are same but the have different atomic masses means having different no. of neutrons. so Atom A and Atom C are the atoms of same elements.
Hence,Based on the information below . The atoms of the same element are Atom A and Atom C.
To learn more about Atoms and Elements here
https://brainly.com/question/15173445
#SPJ1
What's a fear, concern, or worry you have? How can you best prepare to tackle this obstacle? (Write 2 to 3 complete sentences) ¿Qué miedo, preocupación o preocupación tienes? ¿Cómo puedes prepararte mejor para enfrentar este obstáculo? (Escribe de 2 a 3 oraciones completas)
Ayuda plis.
Answer:
I'm worried about going to college and living in a dorm. I'm currently keeping in touch with my roommates to know what kind of people they are. Also, I'm starting to pack and get ready to move to my dorm.
Explanation:
a gallon of iced tea contains 128 fl oz of iced tea. How many l of iced tea in the container
A gallon of iced tea containing 128 fl oz of iced tea contains 3.79 liters of the liquid.
Volume ConversionThe problem here has to do with converting from fl oz to liters.
Recall that:
1 fl oz = 29.6 mL
Thus:
128 fl oz = 29.6 x 128
= 3,788.8 mL
Also recall:
1 mL = 0.001 L
Thus:
3,788.8 L = 3,788.8 x 0.001
= 3.7888 L
In other words, a gallon of iced tea containing 128 fl oz of tea contains 3.79 liters of tea.
More on volume conversion can be found here: https://brainly.com/question/28366961
#SPJ1