Question

These are all multiple choice

Which of the following "per expressions" is NOT correct for the reaction: C ₆H ₁₂O ₆ + 6 O ₂ → 6 CO ₂ + 6 H ₂O

		1 molecule of C6H12O6 reacts per 6 molecules of carbon dioxide formed
		6 moles of water are formed per 6 moles of oxygen reacted
		6 moles of oxygen react per 1 mole of C6H12O6 reacted
		6 grams of oxygen react per 6 grams of water formed

2.

Given the reaction: N₂ + 3 H₂ → 2 NH₃

How many moles of hydrogen would react with 0.076 moles of nitrogen?

		3.00 moles
		0.228 moles
		0.333 moles
		2.05 moles

3.

For the reaction: 2 Al + 6 HBr → 2 AlBr ₃ + 3 H ₂, which of the following "per expressions" must be used to convert the number of moles of aluminum reacted to the number of moles of aluminum bromide formed:

		2 moles aluminum bromide / 2 moles aluminum
		2 moles aluminum / 6 moles hydrobromic acid
		2 moles aluminum bromide / 6 moles hydrobromic acid
		6 moles hydrobromic acid / 2 moles aluminum

4.

For the reaction: 2 C ₂H ₆ + 7 O ₂ → 4 CO ₂ + 6 H ₂O, which of the following "per expressions" must be used to convert the number of moles of water formed to the number of moles of oxygen reacted:

		4 moles carbon dioxide / 6 moles water
		7 moles oxygen / 6 moles water
		6 moles water / 7 moles oxygen
		2 moles C2H6 / 6 moles water

5.

Given the reaction: 2 Al + 6 HCl → 2 AlCl₃ + 3 H₂

How many grams of hydrogen will be produced when 5.24 moles of hydrochloric acid react with excess aluminum?

		2.66 grams
		10.6 grams
		1.32 grams
		5.28 grams

6.

Given the reaction: 4 Al + 3 O₂ → 2 Al₂O₃

How many moles of aluminum would react with excess oxygen to form 5.15 moles of aluminum oxide?

		10.3 moles
		3.43 moles
		13.7 moles
		5.14 moles

Answer 1

As per Chegg policy,the solution of the first four questions are given below.

Q1) Ans-The incorrect statement is (d) 6 grams of oxygen reacts per 6 grams of water formed.

The correct statement should be 192grams of oxygen reacts per 108 g of water formed.

Q2) Ans- According to the reaction 1 mole of N2 reacts with 3 moles of H2

Thus 0.076 moles of N2 will react with,

0.076 X 3 = 0.228 moles of H2

Hence option (b) is correct.

Q3) Ans-(a) is the correct expression to convert the no. of moles of Aluminium reacted to no. of moles of AlBr3 formed.

Q4) Ans-(c) 6 moles of water/7 moles of oxygen

Is the correct expression to convert no. of moles of water form .

Thanks and regards!

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