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Biology etea medical mcqs
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MDCAT ENGLISH MCQs
Biology etea medical mcqs
etea Chemistry
Physics
BS Nursing

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If 2.5 moles of H₂ react with excess N₂ (N₂ + 3H₂ → 2NH₃), the moles of NH₃ formed are approximately:

2.5 moles
5.0 moles
1.67 moles
7.5 moles

ETEA MCQS.COM
Moles and Avogadro’s Numbers

For 2NO + O₂ → 2NO₂, if 1 mole of O₂ reacts, ___ moles of NO₂ are produced.

1
2
0.5
4

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Moles and Avogadro’s Numbers

The mole ratio allows a chemist to calculate the amount of product formed if the amount of ___ is known.

Catalyst
Reactant
Solvent
Temperature

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Moles and Avogadro’s Numbers

If 5 moles of CO are used in Fe₂O₃ + 3CO → 2Fe + 3CO₂, the maximum moles of Fe₂O₃ that can react are:

5 moles
3 moles
1.67 moles
2.5 moles

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Moles and Avogadro’s Numbers

The reaction of 1 mole of nitrogen (N₂) with 3 moles of hydrogen (H₂) produces 2 moles of ammonia (NH₃). This is a statement of:

Molar mass
Molar volume
Mole ratio
Avogadro's law

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Moles and Avogadro’s Numbers

In 2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O, the mole ratio of O₂ to CO₂ is:

2:08
13:08
13:10
8:10

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Moles and Avogadro’s Numbers

The relationship between the amounts of reactants and products in a chemical reaction is known as:

Thermochemistry
Stoichiometry
Electrochemistry
Kinetics

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Moles and Avogadro’s Numbers

A student needs to produce 9 moles of KCl from the reaction 2KClO₃ → 2KCl + 3O₂. The moles of KClO₃ needed are:

3 moles
6 moles
9 moles
12 moles

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Moles and Avogadro’s Numbers

For the reaction 2H₂S + 3O₂ → 2SO₂ + 2H₂O, 6 moles of H₂S will produce ___ moles of SO₂.

2
3
6
12

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Moles and Avogadro’s Numbers

To react with 1 mole of HCl according to Zn + 2HCl → ZnCl₂ + H₂, the moles of Zn required are:

1 mole
2 moles
0.5 moles
4 moles

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Moles and Avogadro’s Numbers

The conversion factor to relate the moles of two substances in a reaction is the:

Molar mass
Avogadro's number
Mole ratio
Molar volume

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Moles and Avogadro’s Numbers

If 0.2 moles of SO₃ are produced (2SO₂ + O₂ → 2SO₃), the moles of O₂ consumed are:

0.1 moles
0.2 moles
0.4 moles
0.05 moles

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Moles and Avogadro’s Numbers

For MgO + 2HCl → MgCl₂ + H₂O, if 5 moles of MgO react, the moles of H₂O formed are:

2.5 moles
5 moles
10 moles
1 mole

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Moles and Avogadro’s Numbers

The mole ratio is derived from the ___ in a balanced chemical equation.

Subscripts
Superscripts
Coefficients
Reactants only

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Moles and Avogadro’s Numbers

If 3 moles of N₂ are available for the reaction N₂ + 3H₂ → 2NH₃, the maximum moles of NH₃ that can be formed are:

2 moles
3 moles
6 moles
9 moles

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Moles and Avogadro’s Numbers

The stoichiometric coefficient in a balanced equation represents the number of:

Grams
Liters
Moles
Molecules

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Moles and Avogadro’s Numbers

In the reaction Fe₂O₃ + 3CO → 2Fe + 3CO₂, to produce 4 moles of iron (Fe), one needs ___ moles of carbon monoxide (CO).

3 moles
4 moles
6 moles
8 moles

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Moles and Avogadro’s Numbers

The reaction 2Mg + O₂ → 2MgO indicates that ___ moles of Mg are needed to produce 10 moles of MgO.

2
5
10
20

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Moles and Avogadro’s Numbers

If 1.5 moles of O₂ are consumed in the reaction C₃H₈ + 5O₂ → 3CO₂ + 4H₂O, the moles of H₂O produced are:

1.2 moles
1.5 moles
4 moles
0.9 moles

ETEA MCQS.COM
Moles and Avogadro’s Numbers

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