For the reaction ?H2 +?O2 → ?H2O, what is the maximum amount of H2O (18.0153 g/mol) which could be formed from 9.43 g of H2 (2.01588 g/mol) and 12.98 g of O2 (31.9988 g/mol)? Answer in units of g.

Answers

Answer 1

Answer: 2H2 + O2 →2H2O
This is a limiting reactant problem in which you need to figure out which reactant is the limiting reactant. You can usually look at the information given and see that hydrogen has the smaller amount of mass used, but it is always good to check that assumption through stoichiometry:
(9.43g H2/2.02g/mol)(2mol H2O/2mol H2)(18.02gH2O/1mol H2O)= 84.1g H2O produced from 9.43g of H2

(12.98g O2/32.00g/mol O2)(2mol H2O/1mol O2)(18.02gH2O/1mol H2O)= 14.6g H2O

So my assumption that hydrogen makes the smaller amount of water is wrong since oxygen (it is the limiting reactant) created the smaller amount of water with 14.6g, so 14.6g is the maximum amount of water that can be formed

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Which of these statements best describes the relationship difference between minerals and rocks

Answers

The statement that best describes the relationship difference is most rocks are made out of minerals.

Answer:

rocks are made out of minerals.

Explanation:

Justify water is compound

Answers

Water is a compound. A compound is made up of two or more elements. In the case of water, or H2O, there are 2 hydrogen atoms present and 1 oxygen atom. I hope this helps you on your assignment. Good luck!

Is a haircut a physical or chemical change?

Answers

A haircut is physical because it just becomes shorter. Its chemical makeup is not altered.
Hope that helped you.

It's a physical because you have to actually do the work by using your hand to give a haircut

It's Peggy Sue's birthday and she's about to blow out the candles on her cake. Brother Roger stops the party when he shouts: "Look at that! Chemical and physical changes taking places on your birthday cake!"How would you respond to Roger?
A) Roger is incorrect. The melting wax is a physical change but there is no chemical change taking place.
B) Roger is correct. Lighting the match is a chemical change and burning the candles is a physical change.
C) Roger is correct. The melting wax is a physical change and the burning candle wick is a chemical change.
D) Roger is incorrect. Only a chemical change is taking place as evidenced by the light and heat of the burning candles.

Answers

Melting of wax is a physical change and chemical change is the burning of candle.

What is chemical and physical changes?

Chemical changes are those changes by which composition of the original matter changes and physical changes are those changes by which only appearance of the matter changes.

In the given activity:

Melting of wax is a physical change because during this composition of wax not changes but only outer structure changes.
Burning of candle and lighting the match are chemical change as it produces energy in the form of heat and light.

Hence, Roger is correct ie. The melting wax is a physical change and the burning candle wick is a chemical change.

To know more about physical and chemical changes, visit the below link:
brainly.com/question/17166994

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This example is an controversial matter because melting an candle is considered as both physical change and chemical change because no new substances were made by melting an candle. The final answer is C.

When 5 grams of salt dissolve in 30 grams of water, what is the resulting mass of the mixture?

Answers

The answer is 35 grams.

When we mix salt and water, salt will dissolve. Still, it mass does not disappear, but remains intact. Mass cannot be destroyed. When salt is dissolved in the water, salt molecules are only re-positioned, but all the molecules are present as well as their mass. So if you add 5 grams of salt in 30 grams of water, the resulting mass will be 5 + 30 grams, which is 35 grams.

Answer: The resulting mass would be 35 grams.

Explanation: Mass cannot be destroyed, there would be no need to re-measure the mass. Therefore, if we add the masses we get 35.

When magnesium burns in Cl2 , it forms magnesium chloride.Which element is reduced?

Answers

Mg + Cl2 ---> MgCl2

Which element is reduced?
answer: chlorine (chlorine is going from 0 on -I)

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