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