Chem Ch 3

If a linear alkane has 12 carbon atoms, how many hydrogen atoms will it have?

26.0

Limestone is primarily a crystal form of CaCO_3. How many moles of oxygen are in a 1.25 mol sample of CaCO_3?

3.75E0

What is the molar mass of carbon dioxide (in units of g/mol)?

4.401E1

What is the formula mass of sodium chloride (in units of g/mol)?

5.844E1

A student measures out 45.62 g of sodium chloride on a laboratory scale. How many moles of sodium chloride have they weighed?

7.806E-1

What is the mass percent of carbon in decane C_{10}H_{22}?

8.439E1

How many grams of H are in a 1.00E2 g sample of the unknown?

8.74E0

How many moles of iron(II) chloride are in 54.1 mg? A) 4.27×10^{−4} mol B) 0.427 mol C) 126.8 mol D) 3.34×10^{−4} mol

A) 4.27×10^{−4} mol

What is the formula of barium fluoride? A) BaF_2 B) BaF C) BF D) F_2Ba

A) BaF_2

What is the empirical formula for acetic acid, CH_3COOH? A) C_2 H_4 O_2 B) CH_2 O C) HC_2 H_3 O_2 D) C_4 H_8 O_4

A) C_2 H_4 O_2

Which of the following is the name for the compound Cr_2 O_3? A) Chromium(III) oxide B) Chromium(II) oxide C) Chromium oxide D) Dichromium trioxide

A) Chromium(III) oxide

Classify the compound CCl_4 A) Covalent compound B) Ionic compound C) Oxoacid D) Binary acid

A) Covalent compound

Which of the following is the name for the compound MgS? A) Magnesium sulfide B) Magnesium sulfur C) Magneside sulfide D) Magneside sulfur

A) Magnesium sulfide

Which of the following is the formula for magnesium sulfate heptahydrate? A) MgSO_4 •7H_2O B) MgSO_3 •7H_2O C) MgSO_3•6H_x D) MgSO_4• 6H_2O

A) MgSO_4 •7H_2O

If there are four fluorine atoms and one sulfur atom in a compound, what is its chemical formula? A) SF_4 B) SF C) F_4 S D) FS4

A) SF_4

Which of the following is the name for the compound SF_6? A) Sulfur hexafluoride B) Sulfur fluoride C) Monosulfur hexafluoride D) Monosulfur fluoride

A) Sulfur hexafluoride

What is the formula for acetic acid?

HC2H3O2, HOOCCH3

Classify each of the following compounds as either ionic or covalent. 1) NaCl A) Ionic 2) H_2O B) Covalent 3) KBr C) Ionic 4) Na_2O D) Covalent 5) CO_2 E) Ionic 6)C_2 H_6 F) Covalent

1- A 2-B 3-C 4-E 5-D 6-F

Match the following chemical species with their appropriate designation. 1) Lithium (Li) A) Metal 2) Li+ D) Anion 3) Fluorine (F) B) Cation 4) F- C) Formula unit 5) LiF E) Nonmetal

1-A 2-B 3-E 4-D 5-C

Match the following compounds with their appropriate classification. 1) H_2 CO_3 (aq) A) Covalent comound 2) Na_3 PO_4 (aq) B) Oxoacid 3) FeO C) Ionic compound 4) HI(aq) D) Binary acid 5) PCl_3 E) Ionic compound

1-B 2-C 3-E 4-D 5-A

Match the following compounds with their names: 1) H_2 S(g) A) Hydrosulfuric acid 2) H_2 S(aq) B) Hydroselenic acid 3) H_2 Se(aq) C) Hydrogen sulfide 4) H_2 Se(g) D) Hydrogen selenide

1-C 2-A 3-B 4-D

Match the following formulas with their systematic names. 1)C_8 H_{18} A) Ethane 2)C_5 H_{12} B) Pentane 3)C_4 H_{10} C) Octane 4)C_2 H_6 D) Decane 5)C_{10} H_{22} E) Butane

1-C 2-B 3-E 4-A 5-D

How many grams of O are in a 100.0 g sample of the unknown?

1.553E1

What is the mass percent of magnesium in magnesium chloride?

2.553E1

What is the molar mass of carbon monoxide (in units of g/mol)?

2.801E1

Potassium nitrate is used for a variety of applications, including fertilizer, rocket fuel, and fireworks. How many molecules of potassium nitrate are in a 25 g sample? A) 0.64 molecules B) 1.5×10^{23} molecules C) 1.4×10^{−24} molecules D) 3.9×10^{23} molecules

B) 1.5×10^{23} molecules

What is the formula of cobalt(III) bromide? A) Co^{+3} Br^{-1} B) CoBr_3 ​C) Co_3 Br D) Co(III)Br

B) CoBr_3

Which of the following is the formula for nitrous acid? A) HNO_3 B) HNO_2 C) NO_2- D) NO_3-

B) HNO_2

What is the formula of carbonic acid? A) HC B) H_2 CO_3 C) HCO_3 D) CO_3

B) H_2 CO_3

Classify the compound KNO_3 A) Covalent compound B) Ionic compound C) Oxoacid D) Binary acid

B) Ionic compound

What ions do Mg and S form? A) Mg^{2-}, S^{2-} B) Mg^{2+}, S^{2-} C) Mg^{+}, S^{2-} D) Mg^{2+}, S^{-}

B) Mg^{2+}, S^{2-}

Which of the following is the name for the compound HClO_4? A) Hydrogen perchlorate acid B) Perchloric acid C) Perchlorous acid D) Hydrogen perchloric acid

B) Perchloric acid

Which of the following is the name for the compound KH_2 PO_4? A) Potassium dihydrogen phosphorous tetraoxide B) Potassium dihydrogen phosphate C) Potassium phosphate D) Potassium hydrogen phosphate

B) Potassium dihydrogen phosphate

What is the formula of xenon trioxide? A) Xe_1O_3 B) XeO_3 C)XeO D)Xe_2O_3

B) XeO_3

How many atoms of oxygen are in a 0.78 mol sample of CaCO_3? A) 2.3 atoms B) 4.7×10^{23} atoms C) 1.4×10^{24} atoms D) 6.0×10^{23} atoms

C) 1.4×10^{24} atoms

What is the formula of calcium nitrite? A)Ca(NO_3)_2 B) CaN_2 O_4 C) Ca(NO_2)_2 D) CaNO_2

C) Ca(NO_2)_2

Which of the following is the name for the compound N_2O_4? A) Nitrogen tetraoxide B) Nitrogen oxide C) Dinitrogen tetraoxide D) Nitrogen(II) oxide

C) Dinitrogen tetraoxide

Which of the following is the formula for iron(II) chloride dihydrate? A) FeCl_2• H_2O B) Fe_2Cl • 2H_2O C) FeCl_2• 2H_2O D) FeCl_2

C) FeCl_2• 2H_2O

What is the formula of hydroiodic acid? A) IH B) HIO_3 C) HI D) HI_2

C) HI

Which of the following is the name for the compound FeCl_2? A) Iron(III)dichloride B) Iron(II) dichloride C) Iron(II) chloride D) Iron(III) chloride

C) Iron(II) chloride

Which of the following is the name for the compound K_2O? A)Potassium dioxide B) Potassium oxygen C) Potassium oxide D) Dipotassium oxide

C) Potassium oxide

If there are three oxygen atoms and one sulfur atom in a compound, what is its chemical formula? A) SO B)O_3 S C) SO_3 D) S_3 O

C) SO_3

What is the formula for carbon tetrafluoride?

CF4

What is the formula for cobalt(II) chromate?

CoCrO4

What is the formula for copper(II) phosphide?

Cu3P2

Classify the compound HCl(aq). A) Covalent compound B) Ionic compound C) Oxoacid D) Binary acid

D) Binary acid

Which of the following is the name for molecular HF when it is dissolved in water? A) Hydrogen fluoride B) Hydrogen monofluoride C) Hydrogen monofluoric acid D) Hydrofluoric acid

D) Hydrofluoric acid

Which of the following is the name for the compound ZnCl_2 •6H_2O? A) Zinc chloride B) Zinc dichloride hexahydrate C) Zinc chloride pentahydrate D) Zinc chloride hexahydrate

D) Zinc chloride hexahydrate

What is the formula for hydrocyanic acid?

HCN, HCN(aq)

What is the formula for lithium oxide?

Li2O

What is the name of NH_4 HCO_3?

ammonium bicarbonate, ammonium hydrogen carbonate

What is the name of the compound NH_4 NO_3?

ammonium nitrate