How many moles of oxygen (O2) are required to completely react with 27.4 mol of H2?

Answers

Answer 1

Answer: 2 H₂ + O₂= 2 H₂O

2 moles H₂ ------- 1 mole O₂
27.4 moles H₂ ---- ?

27.4 * 1 / 2 =

= 27.4 / 2

= 13.7 moles of O₂

hope this helps!

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Adding solvent or removing solute from a soltuion is called __________, and a solution is said to be _______________ if it has more solute.

Answers

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A student tested a sample of carbon (C) by combining it with water. There was no reaction between the carbon and water. The student concluded that carbon must be a group 18 element, since it was unreactive. State whether you agree with the student's reasoning, and explain why or why not?

Answers

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Answers

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In a very violent reaction called a thermite reaction, aluminum metal reacts with iron (III) oxide to form iron metal and aluminum oxide according to the following equation:

Answers

Here's the equation:
Fe2 O3 + 2Al → 2Fe + Al2 O3

Here's the question.
What mass of Al will react with 150g of Fe2 O3?

In every 2 moles Al you need 1 mole Fe2O3

moles = mass / molar mass
moles Fe2O3 = 150 g / 159.69 g/mol
= 0.9393 moles

moles Al needed = 2 x moles Fe2O3
= 2 x 0.9393 mol
= 1.879 moles Al needed

mass = molar mass x moles
mass Al = 26.98 g/mol x 1.879 mol
= 50.69 g
= 51 g (2 sig figs)

So the mass of Al that will react with 150g of Fe2 O3 is 51 grams.

Atoms are the building blocks of elements, molecules, compounds, and mixtures.
true or false?

Answers

Answer:

true

Explanation:

they are the building part of all thing

How many atoms are there in 1.3 x 10^22 molecules of N(O)2

Answers

1 molucule of NO₂, have 1 atom of N, and 2 atoms of O, therefore, 1 molecule of NO₂ have 3 atoms.

1 molecule of NO₂--------------------3 atoms
1.3 * 10²² molecules----------------- x

x=(1.3 * 10²² molecules * 3 atoms) / 1 molecule of NO₂=3.9 * 10²² atoms.

Answer: in 1.3 * 10²² molecules of NO₂ there are 3.9 * 10²² atoms.

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