Answer:
A) 8.51 × 10²⁴
Explanation:
1. Gather all the information
2H₂S + SO₂ ⟶ 3S + 2H₂O
n/mol: 9.42
2. Calculate the moles of S atoms
The molar ratio is 3 mol S:2 mol H₂S
[tex]\text{Moles of S} = \text{9.42 mol H$_{2}$S} \times \dfrac{\text{3 mol S }}{\text{2 mol H$_{2}$S }} = \text{14.13 mol S}[/tex]
3. Calculate the atoms of S
[tex]\text{Atoms of S } = \text{14.13 mol S} \times \dfrac{6.022 \times 10^{23}\text{ S atoms}}{\text{1 mol S}} = \mathbf{8.51 \times 10^{24}}\textbf{ S atoms}[/tex]
The sulfur atoms that should be generated is [tex]A) 8.51 \times 10^24[/tex].
Given that,
9.42 moles of H2S reacted to the given equation.Also, 1 mole for the substance contains [tex]6.022 \times 10^23[/tex] no of atoms & molecules. The calculation is as follows:[tex]= \frac{3\times 6.022\times 10^23\times 0.42}{2}\\\\= 85.0909 \times 10^23\\\\= 8.509 \times 10^24\\\\= 8.51 \times 10^24[/tex]
Therefore we can conclude that the sulfur atoms that should be generated is [tex]A) 8.51 \times 10^24[/tex].
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1) what is formed when hydrogen burns ? write the equation for the reaction .
2) why do you think that, when hydrogen burns, the flame Rises quickly ?
Answer:
formed by burns rises quickly hydorogen
[tex] H_2+\frac12O_2 \longrightarrow H_2O[/tex]
I don't think I need to name the product.
this reaction is very exothermic. so the gases and the flames are very hot, i.e. very lighter (hot air rises) than the normal air. so it rises quickly
A substance X contains 10 gram of calcium carbonate calculate the number of oxide of calcium carbonate present in x
Answer:
x contain 9 percent ofcalcium carbonaye
I thought in the third shell there are 18 electrons, but why are they gaining only 2 electrons?? Pls tell me... I have exam tomorrow....
How is the definition of the word theory different in science versus in everyday life?
A. In everyday speech a theory is the same as a hypothesis-a statement that has (been) tested. In science a theory is a synthesis of a large body of verified information
B. In everyday speech a theory is the same as a hypothesis-a statement that has ( not been) tested. In science a theory is a synthesis of a large body of verified information
Answer:
The second option is correct.
In everyday speech a theory is the same as a hypothesis-a statement that has ( not been) tested. In science a theory is a synthesis of a large body of verified information. The correct option is B.
What is a hypothesis?A hypothesis is an explanation proposed for a phenomenon. The scientific method requires that a hypothesis be testable in order for it to be considered a scientific hypothesis.
Scientists typically base scientific hypotheses on previous observations that cannot be adequately explained by existing scientific theories.
It aids in providing a link between the underlying theory and the specific research question.
It aids in data analysis and assesses the research's validity and reliability. It serves as a foundation or proof of the research's validity.
A theory is the same as a hypothesis in everyday speech—a statement that has (or has not been) tested. A theory in science is a synthesis of a large body of verified information.
Thus, the correct option is B.
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Which reaction is typical neutralization reaction? H+ (aq) + OH- (aq) = H2O (g) NaCl (aq) +AgNO3(aq) = AgCl (s) + NaNO3(aq) CuO(s) +H2SO4(aq) = CuSO(4) + H2O(l) NH3(l) +H2SO4(aq) = (NH4)2SO(s)
Answer:the third
Explanation: because neutralization reaction result salt and water
calculate the percentage by mass of chlorine in Cobalt (II) chloride (cocl2)
Explanation:
Divide the mass of chlorine by the molar mass of cobalt chloride, then multiply by 100.
Molar Mass of Cobalt Chloride.
Mass of Chlorine in Cobalt Chloride.
Percent Composition of Chlorine.
What must happen for water to boil at a given pressure?
O A. The water molecules must become more orderly.
O B. The water must gain thermal energy from its surroundings.
O C. The average kinetic energy of the water molecules must decrease.
D. The water must give off thermal energy to its surroundings.
Answer:
B. The water must gain thermal energy from its surroundings.
Explanation:
Boiling is the process whereby a substance is changed from a liquid state to a gaseous state due to the application of heat. For boiling to be achieved, a liquid substance must reach or exceed its boiling point, which is the specific temperature at which a specific liquid boils.
For this change of state i.e. from liquid to gas, to occur, atoms or molecules of the liquid must gain kinetic energy and move faster. However, this kinetic energy cannot be attained without a rise in temperature, which causes the molecules to gain THERMAL ENERGY or heat energy and move fast. Thermal energy is the energy that arises from a hot substance.
Therefore, for water to boil at a given pressure, it must gain thermal energy from its external surroundings, which causes its molecules to have an increased kinetic energy and move faster. This fast movement of the molecules causes the transition of phases (from liquid to gas).
calculate the number of moles equivalent 10.0 gram of aluminium carbonate
[tex] \LARGE{ \boxed{ \red{ \rm{Answer}}}}[/tex]
☃️ Chemical formulae ➝ [tex]\sf{Al_2(CO_3)_3}[/tex]
How to find?For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.
[tex] \boxed{ \sf{no. \: of \: moles = \frac{given \: weight}{molecular \: weight} }}[/tex]
Solution:❍ Molecular weight of [tex]\sf{Al_2(CO_3)_3}[/tex]
= 2 × 27 + 3 × 12 + 9 × 16
= 54 + 36 + 144
= 234
❍ Given weight: 10 g
Then, no. of moles,
⇛ No. of moles = 10 / 234
⇛ No. of moles = 0.0427 moles
⚘ No. of moles of Aluminium carbonate in the given weight = 0.0427 moles.
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Enumerate any two differences between simple distillation and fractional distillation.
Answer:
Explanation:
By simple distillation, we can separate tow miscible liquids having sufficient difference in their boiling points.
By fractional distillation, we can separate the mixture of two or more miscible liquids for which the difference in their boiling point is less than 25k
Simple distillation is done using an air condenser or water condenser.
Fractionating column is fitted in between the distillation flask and the condenser for the process.
Simple distillation eg: mixture of water and acetone
fractional distillation eg: crude oil
hope this helps
plz mark as brainliest!!!!!!
Answer:
Simple Distillation:
1)This method is used for the separation of components of a mixture containing two miscible liquids that boil without decomposition.
2)The components must have sufficient difference in their boiling points.
Fractional Distillation:
1)Fractional distillation process is used to separate a mixture of two or more miscible liquids.
2)If, the components have the difference in boiling points less than 25K .
Which of these is the definition of the EXPLODE Physical Hazard?
A) Chemicals that are likely to be flammable and/or support a fire
B) Chemicals that release high pressure and could cause bodily injury
C) This is a potential reaction that could take place when two chemicals are
mixed together.
D) This is when a chemical breaks down and could become harmful when
handled improperly or exposed to extreme temperatures
Answer:
Explanation:
Physical hazard means a chemical for which there is scientifically valid evidence that it is a combustible liquid, a compressed gas, explosive, flammable, an organic peroxide, an oxidizer, pyrophoric, unstable (reactive) or water-reactive.
EXPLODE:
to expand with force and noise because of rapid chemical change or decomposition, as gunpowder or nitroglycerine (opposed to implode).
to burst, fly into pieces, or break up violently with a loud report, as a boiler from excessive pressure of steam.
Case Study 1: What went good and what went bad in the lab scenario?
Jane was mixing two chemicals in a beaker. She thought she would be ok not to wear goggles. She noticed that a greenish-yellow gas was bubbling out of the liquids. She had been told to make all observations that she could, so she held the beaker close to her nose and took a good whiff.
Answer:
Nothing went well.
Explanation:
Everything went badly.
Jennifer took off her goggles. The mixture was already bubbling. It could have suddenly spurted into her hands and face. She took a good whiff of the greenish-yellow gas (chlorine?). She should have held the beaker some distance away and gently wafted some of the gas toward her nose.
After swimming in the pool on a very hot day, Sarah had a glass of ice water. Over time, the water on her skin evaporated, and the ice cubes melted in the glass. How
many states of water existed in this scenario?
A. 3
B. 1
C. 4
D. 2
I am sure the answer is A
pls help!!
plz answer correctly!
will give the brainliest!
Urgent!!
a)
A: Copper
B: CuO
C: [tex]\mathrm{CuSO_4}[/tex]
D: $\mathrm{CuCO_3}$
E: $\mathrm{CO_2}$
F: $\mathrm{Cu(NO_3)_2}$
b)
$\mathrm{CuO+ H_2SO_4}\rightarrow \mathrm{CuSO_4 + H_2O}$
c)
$\mathrm{CuCO_3+ 2HNO_3}\rightarrow \mathrm{Cu(NO_3)_2+ CO_2+ H_2O}$
Which is a similarity between alcohol fermentation and aerobic respiration?
I found this information:
Anaerobic respiration begins the same way as fermentation. The first step is still glycolysis, and it still creates 2 ATP from one carbohydrate molecule. However, instead of ending with glycolysis, as fermentation does, anaerobic respiration creates pyruvate and then continues on the same path as aerobic respiration.
After making a molecule called acetyl coenzyme A, it continues to the citric acid cycle. More electron carriers are made and then everything ends up at the electron transport chain. The electron carriers deposit the electrons at the beginning of the chain and then, through a process called chemiosmosis, produce many ATP. For the electron transport chain to continue working, there must be a final electron acceptor. If that acceptor is oxygen, the process is considered aerobic respiration.
Scientists believe that fermentation and anaerobic respiration are older processes than aerobic respiration.
I hope this help. :)
have a good day!
Over a long period of time, a group of people were exposed to high degrees of UV radiation from the sun. While no one became sick immediately, doctors did predict that those exposed had an increased risk of cancer in skin cells. Which type of mutation will this exposure cause? A. acquired, harmful B. acquired, neutral C. inherited, beneficial D. inherited, neutral
Answer:
acquired/harmful
Explanation:
This type of mutation and exposure will cause indefinite problems.
What do you mean by the ’4R principle’ to develop environment friendly habits?
Answer:
We mean this by '4R principle'
ReduceReuseRecucleThe question may be about ' 3R' principle....
calculate the number of moles equivalent to 12.7 gram of iodine molecule
[tex] \LARGE{ \boxed{ \purple{ \rm{Answer}}}}[/tex]
☃️ Chemical formulae ➝ [tex]\sf{I_2}[/tex]
How to find?
For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.
[tex] \boxed{ \sf{No. \: of \: moles = \frac{Given \: weight}{Molecular \: weight} }}[/tex]
Solution:
❍ Molecular weight of [tex]\sf{I_2}[/tex]
= 2 × 126.90
= 253.80
= 254 (approx.)
❍ Given weight: 12.7
Then, no. of moles,
⇛ No. of moles = 12.7 / 254
⇛ No. of moles = 0.05 moles
⚘ No. of moles of Iodine molecule in the given weight = 0.05 moles
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Answer:
The answer is 0.05 molExplanation:
To find the number of moles (n) we use the formula
[tex]n = \frac{m}{M} [/tex]
Where
n is the number of moles
m is the mass of the substance
M is the molar mass
To find the number of moles we must first find the molar mass
Since iodine is a diatomic molecule
M( I ) = 127 × 2 = 254 g/mol
Mass of iodine = 12.7 g
So the number of moles in 12.7 g of iodine is
[tex]n = \frac{12.7 \: g}{254 \: g/mol} [/tex]
We have the final answer as
n = 0.05 molHope this helps you
calculate the number of moles equivalent to 20.0 gram of calcium phosphate
please help
[tex] \LARGE{ \boxed{ \red{ \rm{Answer}}}}[/tex]
☃️ Chemical formulae ➝ [tex]\sf{Ca_3(PO_4)_2}[/tex]
How to find?For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.
[tex] \boxed{ \sf{No. \: of \: moles = \frac{Given \: weight}{Molecular \: weight} }}[/tex]
Solution:Atomic weight of elements:
Ca = 40P = 31O = 16❍ Molecular weight of [tex]\sf{Ca_3(PO_4)_2}[/tex]
= 3 × 40 + 2 × 31 + 8 × 16
= 120 + 62 + 128
= 310 g/mol
❍ Given weight: 20 g
Then, no. of moles,
⇛ No. of moles = 20 g / 310 g mol‐¹
⇛ No. of moles = 0.0645 moles
⚘ No. of moles of Calcium phospate in the given weight = 0.0645 moles.
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Answer:
The answer is 0.08molExplanation:
To find the number of moles in calcium phosphate we use the formula
[tex]n \: = \frac{m}{M} [/tex]
where
n is the number of moles
M is the molar mass
m is the mass of the substance
To find the number of moles we must first find the molar mass
Chemical formula for calcium phosphate is
Ca3( PO4)2
Ca = 40 , P = 31 , O = 16
So the Molar mass of calcium phosphate is
M( Ca3( PO4)2 ) = (20×3) + 2( 31 + (16×4)
= 60 + 2( 31 + 64)
= 60 + 2(95)
= 60 + 190
Molar mass of calcium phosphate =
250g/mol
Mass = 20 g
So we have
[tex]n = \frac{20g}{250g/mol} [/tex]
We have the final answer as
n = 0.08 molHope this helps you
A substance X contains 10 gram of calcium carbonate calculate the number of oxide of calcium carbonate present in X
please help
Answer:
I got 0.01 moles, hope this helps!
remember that it takes 2 electrons to form a bond how many bonds does CIO 3 - have, the chlorate ion
Answer:
3 bonds
Explanation:
solve this by doing the lewis structure for CIO3
Answer:
3 bonds.
Explanation:
2 double bonds and one single bond.
Help me!!!
will give the brainliest!!
plz answer correctly
Urgent!!!
Answer:
The other person was correct =w0
Explanation:
Study this chemical reaction:
Ti+02 - TiO2
Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction.
oxidation:
reduction:
Answer:
oxidation:Ti to Ti Reduction:O2 toO2
Explanation:
oxidation loses electron while Reduction gains electron
If you are trying to measure an
electric current and need to describe the quantity
and units, how will you describe the units?
Answer:
Usually you have V, for voltage, Ohms for resistance, and Coulombs for charge.
Explanation:
See the image attached :)
Is your prediction supported by the membrane potential chart? Explain your answer.
Answer:
Yes, it is. The chart shows that the initial charge of the neuron is negative. When the neuron is stimulated, sodium ions enter the cell. So, the voltage inside the cell changes to positive. When potassium ions move outward, the voltage decreases until it reaches its previous state.
Explanation:
answer on edmentum
What is the molar mas of zinc (Zn)? 6.02 g/mol 30.0 g/mol 48.7 g/mol 65.38 g/mol
Molar mass is defined by the ratio of the mass to the moles. The molar mass of zinc (Zn) in the periodic table is said to be 65.38 g/mol. Thus, option D is correct.
What is molar mass?Molar mass is the mass of the element or the compound in one mole of the given substance. It is denoted in units gm/ mol. The units come from the ratio of mass in grams to the moles in mol.
It is used to calculate the amount of the substance present in the mole of the substance and can be expressed as particles, like ions, or molecules with the help of Avogadro's number.
The molar mass or the atomic mass of the zinc element is denoted in the periodic table. The mass is written on the lower side of the element symbol.
Therefore, the molar mass of zinc (Zn) is 65.38 g/mol.
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calculate the number of moles equivalent to 5.0 gram of calcium oxide
please help
Answer:
The answer is 0.089 molExplanation:
The number of moles of a substance can be found by
[tex]n = \frac{m}{M} [/tex]
where
n is the number of moles
M is the molar mass
m is the mass of the substance
To find the number of moles we must first find the molar mass
Chemical formula for calcium oxide is
CaOSo the molar mass of CaO is
M( CaO) = 40 + 16 = 56 g/mol
Mass of CaO = 5.0g
Substitute the given values into the formula
The number of moles in 5.0g of calcium oxide is
[tex]n = \frac{5 \: g}{56 g/mol} [/tex]
We have the final answer as
n = 0.089 molHope this helps you
[tex] \LARGE{ \boxed{ \pink{ \rm{Answer}}}}[/tex]
☃️ Chemical formulae ➝ [tex]\sf{CaO}[/tex]
How to find?For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.
[tex] \boxed{ \sf{No. \: of \: moles = \frac{Given \: weight}{Molecular \: weight} }}[/tex]
Solution:Atomic weight of elements:
Ca = 40O = 16❍ Molecular weight of [tex]\sf{CaO}[/tex]
= 40 + 16
= 56 g/mol
❍ Given weight: 5 g
Then, no. of moles,
⇛ No. of moles = 5 g / 56 g mol‐¹
⇛ No. of moles = 0.089 moles [tex]\approx[/tex] 0.09 moles
⚘ No. of moles of Calcium oxide in the given weight = 0.09 moles approx.
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The study of such concepts as motion, force, energy, matter, heat, sound, light, and the components of atoms is:
Answer:
chemistry
Explanation:
Molar mass is reported on the periodic table in the units
A. kg/m3
B. grams/mole.
C. moles/gram.
D. atoms/gram.
Answer:
[tex]\boxed{\sf B. \ grams/mole}[/tex]
Explanation:
[tex]\sf The \ molar \ mass \ of \ a \ substance \ is \ the \ mass, \ in \ grams,\ per \ one \ mole.[/tex]
[tex]\displaystyle \sf \frac{grams}{mole}[/tex]
Answer:
B
Explanation:
Grams/mole is correct. Got right on test!
if a moving object changes direction, its ____ would NOT necessarily
If a moving object changes its direction, its
change.
A) speed
B) velocity
C) acceleration
Which ionic equation for reaction of Magnesium with dilute hydrochloric acid is correct? Mg (s) + 2H+ (aq) â Mg2+ (aq) + H2 (g) Mg (s) + 2HCl (aq) â MgCl2+ (aq) + H2 (g) Mg (s) + 2H+ (aq) â Mg2+ (s) + H2 (g) Mg (s) + H+ (aq) â Mg+ (aq) + H2 (g)
Answer:
Mg(s) + 2H⁺(aq) ⟶ Mg²⁺(aq) + H₂(g)
Explanation:
A net ionic equation shows all the ionic substances as ions and shows the correct state of each substance.
B. is wrong. HCl ionizes in aqueous solution into H⁺ and Cl⁻.
C. is wrong. Mg²⁺ is not a solid. It is an aqueous ion.
D. is wrong. The equation needs 2H⁺(aq) to be balanced.
