Q: How many fluorine atoms are present in $$12.15$$ mol of $$C_2H_2BrF_3$$?

$$7.29 \times 10$$^{24}$$ F atoms

Q: A sample of $$C_6H_5NO_3$$ contains the same number of oxygen atoms as $$12.4 g of$$ $$C_6H_4O_4. $$How many nitrogen atoms are present in the sample?

$$1.24 \times 10$$^{23}$$ N atoms

Q: How many Fe atoms are present in $$6 L of $$blood in a typical adult?

$$3.47 \times 10$$^{21}$$ Fe atoms

Q: How many atoms are present in $$0.00102$$ mol of $$CH_3CH_2CH_2OH$$?

$$4.92 \times 10$$^{21}$$ atoms

Question 1

Which of the following formulas must be a molecular formula rather than an empirical formula?

Accepted Answer

NH4

Question 2

How many fluorine atoms are present in $$12.15$$ mol of $$C_2H_2BrF_3$$?

Accepted Answer

$$7.29 	imes 10$$^{24}$$ F atoms

Question 3

What is the percent composition by mass of oxygen in $$C_9H_7NO_4$$?

Accepted Answer

$$9.87\%$$

Question 4

A sample of $$C_6H_5NO_3$$ contains the same number of oxygen atoms as $$12.4 g of$$ $$C_6H_4O_4. $$How many nitrogen atoms are present in the sample?

Accepted Answer

$$1.24 	imes 10$$^{23}$$ N atoms

Question 5

How many Fe atoms are present in $$6 L of $$blood in a typical adult?

Accepted Answer

$$3.47 	imes 10$$^{21}$$ Fe atoms

Question 6

Which of the following is the correct formula for calcium dihydrogen phosphate?

Accepted Answer

$$Ca(H_2PO_4)_2$$

Question 7

What is the mass of $$CO_2$$ produced when $$1.00 g of$$ $$C_2H_5OH is $$completely combusted?

Accepted Answer

$$3.71 g$$

Question 8

Which of the following is the correct formula for dinitrogen tetroxide?

Accepted Answer

$$N_2O_4$$

Question 9

What is the molar mass of one mole of a typical air sample?

Accepted Answer

$$29 g$

Question 10

Which of the following is the correct formula for lead (II) chloride?

Accepted Answer

$$PbCl_2$$

Question 11

How many moles of nitrogen atoms are present in $$4.3 g of$$ $$Mg(NO_3$)_2$$?

Accepted Answer

$$0.589$$ mol

Question 12

Which of the following is the correct formula for sodium hydrogen sulfite?

Accepted Answer

$$NaHSO_3$$

Question 13

Which of the following is the correct formula for tin (IV) oxide?

Accepted Answer

$$SnO_2$$

Question 14

What is the mass percent of carbon in $$C_9H_7NO_4$$?

Accepted Answer

$$74.0\%$$

Question 15

Which of the following is the correct formula for aluminum phosphate?

Accepted Answer

$$AlPO_4$$

Question 16

How many atoms are present in $$0.00102$$ mol of $$CH_3CH_2CH_2OH$$?

Accepted Answer

$$4.92 	imes 10$$^{21}$$ atoms

Question 17

Which of the following is the correct formula for disulfur dichloride?

Accepted Answer

$$S_2Cl_2$$

Question 18

What is the mass of $$H_2O$$ produced when $$1.00 g of$$ $$C_2H_5OH is $$completely combusted?

Accepted Answer

$$1.90 g$$

Question 19

Which of the following is the correct formula for dinitrogen tetroxide?

Accepted Answer

$$N_2O_4$$

Question 20

Which of the following is the correct formula for propanoic acid?

Accepted Answer

$$C_2H_5COOH$$

Fundamental Concepts in General Chemistry: Atoms, Molecules, and Chemical Nomenclature

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