2H2 + O2 → 2H2O
"PLEASE HELP ASAP"
Which of the following statements would be correct if one mole of hydrogen was used in this reaction? (5 points)
One mole of oxygen was used in this reaction.
Two moles of oxygen were used in this reaction.
One mole of water was produced from this reaction.
Two moles of water were produced from this reaction.
Answer:
- One mole of oxygen was used in this reaction.
- Two moles of water were produced from this reaction.
Explanation:
In addition: - Two moles of hydrogen were used.
Given the data from the question, the correct statement is:
One mole of water, H₂O was produced from the reaction Basic conceptTo know which options are correct, we shall determine the number of mole of O₂ used and the number of mole of H₂O produced.
How to determine the mole of O₂ usedBalanced equation
2H₂ + O₂ —> 2H₂O
From the balanced equation above,
2 moles of H₂ required 1 mole of O₂
Therefore,
1 mole of H₂ will require = 1 / 2 = 0.5 mole of O₂
Thus, 0.5 mole of O₂ is needed for the reaction
How to determine the mole of H₂O producedFrom the balanced equation above,
2 moles of H₂ reacted to produce 2 moles of H₂O
Therefore,
1 mole of H₂ will also react to to produce 1 mole of H₂O
Thus, 1 mole of H₂O was produced from the reaction.
SUMMARY
When 1 mole of H₂ was used in the reaction,
0.5 mole of O₂ was used 1 mole of H₂O was producedConsidering the options given in the question above, the correct statement is:
1 mole of H₂O was producedLearn more about stoichiometry:
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Given a gas with an initial volume of 3.0 L and a temperature of 290 K, what is the final volume if the
temperature is 273 K?
Plzzz neeed this really quick
Answer:
2.8l
Explanation:
just make v2 de subject
help me get this right
Answer:I’m 100% it’s the second one
Explanation:
I have done it before and missed one but not this question
What is a cell? Please help
Explanation:
A cell is the membrane unit that contains all the fundamental molecules to living life. To make it short nd easy, a cell is the smallest nd basic unit of life, it's responsible for all life's processes. The human body is comped of m(tr)illions of cells, they all each provide different types of functions.
This tool is used to measure
Answer:
C. volume
Explanation:
When nutrients, water, and materials cross a cell membrane without requiring energy from the cell, the process is called
A: Active Transport
B: homeostasis
C: Selective Permeability
D: Diffusion
Help me please!!!!!!!!
Answer:
4.00
Explanation:
. Which of the following is not a product of photosynthesis?
O A. Carbon dioxide
O B. Glucose
O C. Oxygen
Answer:
The answer would be a
Explanation:
That is what goes into the plant and oxygen IS an outcome
How many total atoms make up the chemical formula Ca3( PO4)2
12
13
11
10
Answer:
The total atoms present in the chemical formula is 13
Explanation:
How heavy is 5 moles of silver in grams?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Silver, or 107.8682 grams.
Explanation:
I took a test about this :)
Molecules are always in motion. True False
Answer: FALSE
Explanation:
Li + H2O + LiOH + H2
How do I balance this?
Answer:
2Li + 2H2O → 2LiOH + H2
Explanation:
Lithium + Water = Lithium Hydroxide + Dihydrogen
Help me get it right and no links
Answer:sorry
Explanation:
Answer:
C
Explanation:
C, because unlike A and B, it's an improvement in human population. And D wouldn't really be classified as an improvement as it states "Population has not decreased or increased significantly."
Question 1
A molecule contains carbon, hydrogen and oxygen. For every carbon atom there are
twice as many hydrogen atoms but the same number of oxygen atoms.
What is the formula of the molecule?
А
CH 0
B
C2H4O2
C
C,H,O2
D
C,H,O2
The required molecule is :
=》option B.) C2H4O2
it has 2 carbon atoms, 4 hydrogen atoms which it twice the number of carbon atoms and 2 oxygen atoms same as carbon.
What is the standard cell notation of a galvanic cell made with zinc and gold?
A. Zn2+(aq) | Zn(s) || Au(s) | Au+(aq)
B. Au(s)| Aut(aq) || Zn2+(aq) | Zn(s)
C. Aut (aq)| Au(s) || Zn(s) | Zn2+(aq)
D. Zn(s) | Zn2+ (aq) || Aut(aq) | Au(s)
Answer:
D
Explanation:
Select ALL the compounds that would be classified as an acid:
HCI
H20
HC2H302
NaCl
KOH
Mg(OH)2
Answer:
option A,B,C
Explanation:
HCl
H2O
HC2H3O2
In the list given , following substance are classified as Acid:
HCl , HC₂H₃O₂ .
What is an Acid ?
A substance that can donate a proton or accept an electron pair to form a bond is called an Acid.
An acid turns Litmus paper red and has pH < 7 , It has the property of neutralizing alkali.
It has sour taste and can dissolve metals.
HCl is a strong acid , H₂O is neutral , HC₂H₃O₂ (Acetic acid) is a weak acid , NaCl is Salt , KOH and Mg(OH)₂ are strong base.
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which one of the following are not steps of a balanced equation?
Answer:
Dealing with the states of both the reactant and product elements
PLEASE HELP! NO LINKS! CHEMISTRY!
Solution A has a pH of 2.0. Solution B has a pH of 5.0. Which solution is more acidic? Based on the H+ ion concentrations in the two solutions, how many times more acidic?
Answer:
Solution A is 1,000 times more acidic than Sol. B
Explanation:
for pH values we use scientific notation:
-log10 c (where c is the hydrogen ion concentration) is used to notate pH value (think of it as a unit)
ie:
10^-2 is sol A 10^-5 is sol B
5-2 is 3
10^-3 = 1000
there's a diff of 1,000 between the solutions.
The acidity or alkalinity of a solution depends on the hydronium ion concentration and hydroxide ion concentration. Here the solution A of pH 2.0 is more acidic than the solution of pH 5.0.
What is pH?The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. When the pH of the solution is less than 7 it is acidic whereas when pH is greater than 7, it will be basic.
The pH of the solution is calculated by the equation:
pH = - log [H₃O⁺]
Then the concentration of H₃O⁺ is:
[H₃O⁺] = 10⁻pH
At pH = 2.0, [H₃O⁺] = 10⁻² = 0.01
At pH = 5.0, [H₃O⁺] = 10⁻⁵ = 0.00001
Thus here the Solution A is 1,000 times more acidic than Solution B.
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Hi, am I hot??
Please tell me I’m hot.
Answer:
you hot A S F
Explanation:
PLEASE ANSWER ASAP!
The number placed in front of a formula is called a coefficient. The small number within a chemical formula is called a subscript. Why do we adjust coefficients when balancing chemical equations and not subscripts?
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While balancing the chemical equations, the sub scripts aren't changed because by changing sub script we actually change the compound formed, hence coefficients are changed so the compound remains the same.
for example : ( for understanding )
in balancing the given reaction,
H2 + O2 =》H2O
if we change Oxygen's sub script in " H2O "
we get,
H2O + O2 =》H2O2
but here the compound formed isn't water, it is "H2O2" (hydrogen peroxide), so we can't change the sub script.
but by changing the coefficient, we get :
2 H2 + O2 =》2 H2O
How many atoms in 13.88 mole of lead? (Round to 3 sig figs)
Answer:
8.36 x 10^24 atoms/molecules
Explanation:
Avagadro's Number: 6.02214076 × 10^23
Avagadro's Number shows the number of molecules in 1 mole of substance. In this case, if there is 13.88 moles of lead, we multiply 13.88 by Avagadro's number:
(6.02214076 × 10^23)(13.88) = 8.358536 x 10^24 = 8.36 x 10^24
plz help me get it right no links
Answer:
D
Explanation:
earth orbits the sun. the sun doesn’t orbit around earth. and moon take 27 days around the earth
Which is the coefficient in this compound?
4CO2
Answer:
the answer is
Explanation:
number of mollecoles
In chemistry a coefficient denotes the number that is seen in front of the formula of a equation. The coefficient in the given equation 4CO₂ is 4.
What is a coefficient?A number which precedes the formulas of reactants and products in order to balance a chemical equation is defined as a coefficient. It represents the number of atoms or molecules of each elements which are present in the reaction.
A chemical equation should be balanced and it must obey the law of conservation of mass which states that the number of reactants and products on both sides of the equation should be equal.
The coefficients are the numbers which are required to balance a chemical equation and it may vary while balancing a equation. The coefficient is found to be 1 if no number is mentioned in front of the formula of the reactants and products.
In the given equation 4CO₂, 4 is the coefficient which shows that 4 'C' atoms and 8 'O' atoms are present in the compound CO₂.
Thus the coefficient in the compound 4CO₂ is 4.
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Conservation of matter means that:
55
Matter is never created nor destroyed.
Matter is always created and destroyed.
Matter always turns into energy
Matter is flexible, it can be created destroyed, or turned into energy
Answer:
Matter is never created or destroyed
When water changes from gas to liquid, the: color of the water remains the same volume of the water remains the same mass of the water remains the same
Answer:
color of water remains same
What does change in different types of milk?
1.
2.
Answer:
the flavour or the taste or the packaging
The same amount of heat is added to a 10-g sample of each of the following metals. If each metal is initially at 20.0°C, which metal will reach the highest temperature? show your work
A. gold 0.129 J/(g °C)
B. beryllium 1.82 J/(g °C)
C. calcium 0.653 J/(g °C)
D. copper 0.385 J/(g °C)
Answer: A
Explanation:
A
Heat is the product of the mass, specific heat, and delta temperature. The gold metal will reach the highest temperature. Thus, option A is correct.
What is specific heat?Specific heat (c) is the heat required by a substance to get heated a unit mass by a unit of temperature. The specific heat is given as,
[tex]\rm c = \rm \dfrac{Q}{m \times \Delta T}[/tex]
Here, Q is the heat applied, m is the sample's mass and delta T is the change in the temperature.
The value of heat applied is the same for all the metals, so a change in temperature is calculated as,
[tex]\rm \Delta T = \rm \dfrac{Q}{c . m }[/tex]
From this, it can be said that the temperature is inversely related to the specific heat of the metal and hence the metal having the smallest c will have the highest change in the temperature.
Therefore, gold (c = 0.129 J/(g°C)) will reach the highest temperature.
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Please help it’s my final
What is the IUPAC name for Ester with 9 carbon atoms ?
Explanation:
[tex]CH _{3}CH _{2}COOCH _{2} CH _{2}CH _{2}CH _{2}CH _{2}CH _{3}[/tex]
NAME: Hexylpropenoate
Define ductility.
Ty!!
Explanation:
Ductility is the ability of a material to be drawn or plastically deformed without fracture. It is therefore an indication of how ‘soft’ or malleable the material is. The ductility of steels varies depending on the types and levels of alloying elements present. An increase in carbon, for example, will increase the strength but decrease the ductility.
Answer:
ductility of a metal able to be drawn out into a long thin wire.