Q: How many molecules are in 1.058 g of water ($$\mathrm{H_2O}$$)?

$$3.537 \times 10$$^{22}$$ molecules

Question 1

Which of the following best describes the concept illustrated in the first image (target with clustered marks)?

Accepted Answer

Precise

Question 2

What is the empirical formula for glucose, $$\mathrm{C_6H_{12}O_6$}$$?

Accepted Answer

$$\mathrm{CH_2O}$$

Question 3

How many significant figures are in the number $$1.050 	imes 10^9$?

Accepted Answer

4

Question 4

Which of the following is the correct chemical formula for calcium nitrate?

Accepted Answer

$$\mathrm{Ca(NO_3$)_2}$$

Question 5

An oxide ion, $$\mathrm{O$$^{2-}$$}$$, has how many protons and electrons?

Accepted Answer

8 protons and 10 electrons

Question 6

Which group in the periodic table is known to be inert?

Accepted Answer

Noble gases

Question 7

What is the molecular formula for dinitrogen tetroxide?

Accepted Answer

$$\mathrm{N_2O_4}$$

Question 8

Which of the following is a chemical change?

Accepted Answer

Burning gasoline

Question 9

How many moles of $$\mathrm{O_2$}$$ will be formed from 1.65 moles of $$\mathrm{$$KClO_3$$}$$ according to the reaction $$2\mathrm{$$KClO_3$$} \rightarrow 2\mathrm{KCl} + 3\mathrm{O_2$}$$?

Accepted Answer

2.48 mol $$\mathrm{O_2$}$$

Question 10

What is the molar mass of $$\mathrm{$$PbSO_4$$}$$?

Accepted Answer

$$303.3\ \mathrm{g/mol}$$

Question 11

How many molecules are in 1.058 g of water ($$\mathrm{H_2O}$$)?

Accepted Answer

$$3.537 	imes 10$$^{22}$$ molecules

Question 12

Which contains more molecules: 10.0 grams of $$\mathrm{O_2$} or 50.0 $$grams of iodine ($$\mathrm{I_2$}$$)?

Accepted Answer

10.0 grams of $$\mathrm{O_2$}$$

Question 13

What is the limiting reactant when 5.4 moles of aluminum and 15 moles of $$\mathrm{Fe_2O_3}$$ are mixed in the reaction $$2\mathrm{Al} + \mathrm{Fe_2O_3} \rightarrow 2\mathrm{Fe} + \mathrm{Al_2O_3}$$?

Accepted Answer

Aluminum

Question 14

How many grams of $$\mathrm{Fe_2O_3}$$ are produced when 42.7 grams of Fe is reacted according to $$4\mathrm{Fe} + 3\mathrm{O_2$} \rightarrow 2\mathrm{Fe_2O_3}$$?

Accepted Answer

61.0 g

Question 15

What is the correct formula for Iron(III) chlorate?

Accepted Answer

$$\mathrm{Fe($$ClO_3$$)_3}$$

Question 16

How many grams of $$\mathrm{CO_2$}$$ are produced from the combustion of 100 grams of butane ($$\mathrm{C_4H_{10}}$$)?

Accepted Answer

303 g

Question 17

Which of the following is NOT a diatomic element?

Accepted Answer

Sulfur

Question 18

What is the definition of an atom?

Accepted Answer

The smallest unit into which an element can be divided without losing its identity

Question 19

What is the purpose of a structural formula?

Accepted Answer

It shows the bonding of all the atoms

Question 20

Which type of reaction is represented by $$4\mathrm{Ni} + 4\mathrm{Al} + \mathrm{S_8$} \rightarrow 2\mathrm{Ni_2Al_2S_4}$$?

Accepted Answer

Combination reaction

General Chemistry Exam 1 Review: Matter, Atoms, Molecules, and Reaction Stoichiometry

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