?Compare \(1 \text { mole of } \mathrm{H}_{2}, 1 \text { mole of } \mathrm{O}_{2}, \text

What is the total mass (amu) of carbon in each of the following molecules? (a) \(\mathrm{CH}_{4}\) (b) \(\mathrm{CHCl}_{3}\) (c) \(\mathrm{C}_{12} \mathrm{H}_{10} \mathrm{O}_{6}\) (d) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2}\) Equation Transcription: Text Transcription: CH_4 CHCl_3 C_12 H_10 O_6 CH_3 CH_2 CH_2 CH_2 CH_2

What is the total mass of hydrogen in each of the molecules? (a) \(\mathrm{CH}_{4}\) (b) \(\mathrm{CHCl}_{3}\) (c) \(\mathrm{C}_{12} \mathrm{H}_{10} \mathrm{O}_{6}\) (d) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2}\) Equation Transcription: Text Transcription: CH_4 CHCl_3 C_12 H_10 O_6 CH_3 CH_2 CH_2 CH_2 CH_3

Calculate the molecular or formula mass of each of the following: (a) \(P_{4}\) (b) \(\mathrm{H}_{2} \mathrm{O}\) (c) \(\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}\) (d) \(\mathrm{CH}_{3} \mathrm{CO}_{2} \mathrm{H}\) (acetic acid) (e) \(C_{12} H_{22} O_{11}\) (sucrose, cane sugar) Equation Transcription: Text Transcription: P_4 H_2 O Ca(NO_3 )_2 CH_3 CO_2 H C_12 H_22 O_11

Which molecule has a molecular mass of \(28.05\ \mathrm{amu}\)? (a) (b) (c) Equation Transcription: Text Transcription: 28.05 amu

Compare \(1 \text { mole of } \mathrm{H}_{2}, 1 \text { mole of } \mathrm{O}_{2}, \text { and } 1 \text { mole of } \mathrm{F}_{2}\). (a) Which has the largest number of molecules? Explain why. (b) Which has the greatest mass? Explain why. Equation Transcription: Text Transcription: 1 mole of H_2 , 1 mole of O_2 , and 1 mole of F_2

Which contains the greatest mass of oxygen: \(0.75 \mathrm{~mol}\) of ethanol \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\right), 0.60 \mathrm{~mol}\) of formic acid \(\left(\mathrm{HCO}_{2} \mathrm{H}\right), \text { or } 1.0 \mathrm{~mol}\) of water \(\left(\mathrm{H}_{2} \mathrm{O}\right)\)? Explain why. Equation Transcription: Text Transcription: 0.75 mol (C_2 H_5 OH), 0.60 mol (HCO_2 H), or 1.0 mol (H_2 O)

Which contains the greatest number of moles of oxygen atoms: \(1 \mathrm{~mol}\) of ethanol \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\right), 1 \mathrm{~mol}\) of formic acid \(\left(\mathrm{HCO}_{2} \mathrm{H}\right), \text { or } 1 \mathrm{~mol}\) of water \(\left(\mathrm{H}_{2} \mathrm{O}\right)\)? Explain why. Equation Transcription: Text Transcription: 1 mol (C_2 H_5 OH), 1 mol (HCO_2 H), or 1 mol (H_2 O)

Calculate the molar mass of each of the following compounds: (a) hydrogen fluoride, \(H F\) (b) ammonia, \(\mathrm{NH}_{3}\) (c) nitric acid, \(\mathrm{HNO}_{3}\) (d) silver sulfate, \(\mathrm{Ag}_{2} \mathrm{SO}_{4}\) (e) boric acid, \(B(O H)_{3}\) Equation Transcription: Text Transcription: HF NH_3 HNO_3 Ag_2 SO_4 B(OH)_3

Calculate the molar mass of each of the following: (a) \(S_{8}\) (b) \(\mathrm{C}_{5} \mathrm{H}_{12}\) (c) \(\mathrm{SC}_{2}\left(\mathrm{SO}_{4}\right)_{3}\) (d) \(\mathrm{CH}_{3} \mathrm{COCH}_{3}\) (acetone) (e) \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\) (glucose) Equation Transcription: Text Transcription: S_8 C_5 H_12 SC_2 (SO_4 )_3 CH_3 COCH_3 C_6 H_12 O_6

Calculate the empirical or molecular formula mass and the molar mass of each of the following minerals: (a) limestone, \(\mathrm{CaCO}_{3}\) (b) halite, \(\mathrm{NaCl}\) (c) beryl, \(\mathrm{Be}_{3} \mathrm{Al}_{2} \mathrm{Si}_{6} \mathrm{O}_{18}\) (d) malachite, \(\mathrm{Cu}_{2}(\mathrm{OH})_{2} \mathrm{CO}_{3}\) (e) turquoise, \(\mathrm{CuAl}_{6}\left(\mathrm{PO}_{4}\right)_{4}(\mathrm{OH})_{8}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}\) Equation Transcription: Text Transcription: CaCO_3 NaCl Be_3 Al_2 Si_6 O_18 Cu_2 (OH)_2 CO_3 CuAl_6 (PO_4 )_4 (OH)_8 (H_2 O)_4

Calculate the molar mass of each of the following: (a) the anesthetic halothane, \(\mathrm{C}_{2} \mathrm{HBrClF}_{3}\) (b) the herbicide paraquat, \(\mathrm{C}_{12} \mathrm{H}_{14} \mathrm{~N}_{2} \mathrm{Cl}_{2}\) (c) caffeine, \(\mathrm{C}_{8} \mathrm{H}_{10} \mathrm{~N}_{4} \mathrm{O}_{2}\) (d) urea, \(\mathrm{CO}\left(\mathrm{NH}_{2}\right)_{2}\) (e) a typical soap, \(\mathrm{C}_{17} \mathrm{H}_{35} \mathrm{CO}_{2} \mathrm{Na}\) Equation Transcription: Text Transcription: C_2 HBrCIF_3 C_12 H_14 N_2 CI_2 C_8 H_10 N_4 O_2 CO(NH_2 )_2 C_17 H_35 CO_2 Na

Determine the number of moles of compound and the number of moles of each type of atom in each of the following: (a) \(25.0\ g\) of propylene, \(\mathrm{C}_{3} \mathrm{H}_{6}\) (b) \(3.06 \times 10^{-3} g\) of the amino acid glycine, \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NO}_{2}\) (c) \(25\ lb\) of the herbicide Treflan, \(C_{13} H_{16} N_{2} O_{4} F(1 l b=454 g)\) (d) 0.125 kg of the insecticide Paris Green, \(\mathrm{Cu}_{4}\left(\mathrm{AsO}_{3}\right)_{2}\left(\mathrm{CH}_{3} \mathrm{CO}_{2}\right)_{2}\) (e) \(325\ mg\) of aspirin, \(\mathrm{C}_{6} \mathrm{H}_{4}\left(\mathrm{CO}_{2} \mathrm{H}\right)\left(\mathrm{CO}_{2} \mathrm{CH}_{3}\right)\) Equation Transcription: Text Transcription: 25.0 g C_3 H_6 3.06 times 10^-3 g C_2 H_5 NO_2 25 lb C_13 H_16 N_2 O_4 F (1 lb = 454 g) 0.125 kg Cu_4 (AsO_3 )_2 (CH_3 CO_2 )_2 325 mg C_6 H_4 (CO_2 H)(CO_2 CH_3 )

Determine the mass of each of the following: (a) \(0.0146 \mathrm{~mol}\ \mathrm{KOH}\) (b) \(10.2 \mathrm{~mol}\) ethane, \(C_{2} H_{6}\) (c) \(1.6 \times 10^{-3} \mathrm{~mol} \mathrm{Na}_{2} \mathrm{SO}_{4}\) (d) \(6.854 \times 10^{3} \mathrm{~mol}\) glucose, \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\) (e) \(2.86 \mathrm{~mol}\ \mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6} \mathrm{Cl}_{3}\) Equation Transcription: Text Transcription: 0.0146 mol KOH 10.2 mol C_2 H_6 1.6 times 10^-3 mol Na_2 SO_4 6.854 times 10^3 mol C_6 H_12 O_6 2.86 mol Co(NH_3 )_6 Cl_3

Determine the number of moles of the compound and determine the number of moles of each type of atom in each of the following: (a) \(2.12\ g\) of potassium bromide, \(K B r\) (b) \(0.1488\ g\) of phosphoric acid, \(\mathrm{H}_{3} \mathrm{PO}_{4}\) (c) \(23\ kg\) of calcium carbonate, \(\mathrm{CaCO}_{3}\) (d) \(78.452\ g\) of aluminum sulfate, \(\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}\) (e) \(0.1250\ mg\) of caffeine, \(\mathrm{C}_{8} \mathrm{H}_{10} \mathrm{~N}_{4} \mathrm{O}_{2}\) Equation Transcription: Text Transcription: 2.12 g KBr 0.1488 g H_3 PO_4 23 kg CaCO_3 78.452 g Al_2 (SO_4 )_3 0.1250 mg C_8 H_10 N_4 O_2

Determine the mass of each of the following: (a) \(2.345 \mathrm{~mol}\ \mathrm{LiCl}\) (b) \(0.0872 \mathrm{~mol}\) acetylene, \(C_{2} H_{2}\) (c) \(3.3 \times 10^{-2} \mathrm{~mol}\ \mathrm{Na}_{2} \mathrm{CO}_{3}\) (d) \(1.23 \times 10^{3} \mathrm{~mol}\) fructose, \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\) (e) \(0.5758 \text { mol } \mathrm{FeSO}_{4}\left(\mathrm{H}_{2} \mathrm{O}\right)_{7}\) Equation Transcription: Text Transcription: 2.345 mol LiCl 0.0872 mol C_2 H_2 3.3 times 10^-2 mol Na_2 CO_3 1.23 times 10^3 mol C_6 H_12 O_6 0.5758 mol FeSO_4 (H_2 O)_7

The approximate minimum daily dietary requirement of the amino acid leucine, \(\mathrm{C}_{6} \mathrm{H}_{13} \mathrm{NO}_{2}\) , is \(1.1 g\). What is this requirement in moles? Equation Transcription: Text Transcription: C_6 H_13 NO_2 1.1 g

Determine the mass in grams of each of the following: (a) \(0.600 \mathrm{~mol}\) of oxygen atoms (b) \(0.600 \mathrm{~mol}\) of oxygen molecules, \(\mathrm{O}_{2}\) (c) \(0.600 \mathrm{~mol}\) of ozone molecules, \(O_{3}\) Equation Transcription: Text Transcription: 0.600 mol O_2 O_3

A 55-kg woman has \(7.5 \times 10^{-3} \mathrm{~mol}\) mol of hemoglobin (molar mass = 64,456 g/mol) in her blood. How many hemoglobin molecules is this? What is this quantity in grams? Equation Transcription: Text Transcription: 7.5 x 10^-3

Determine the number of atoms and the mass of zirconium, silicon, and oxygen found in 0.3384 mol of zircon,\(\mathrm{ZrSiO}_{4}\), a semiprecious stone. Equation Transcription: Text Transcription: ZrSiO_4

Determine which of the following contains the greatest mass of hydrogen: 1 of \(\mathrm{CH}_{4}, 0.6 \mathrm{~mol}\) of \(\mathrm{C}_{6} \mathrm{H}_{6}\), or 0.4 mol of \(\mathrm{C}_{3} \mathrm{H}_{8}\) Equation Transcription: mol Text Transcription: CH_4, 0.6 mol C_{6}H_{6} C_{3}H_{8}

Determine which of the following contains the greatest mass of aluminum: 122 g of \(\mathrm{AlPO}_{4}\), 266 g of \(\mathrm{Al}_{2} \mathrm{Cl}_{6}\), or 225 g of (\mathrm{Al}_{2} \mathrm{~S}_{3}\). Equation Transcription: Text Transcription: AlPO_4 Al_{2}Cl_{6} Al_{2}S_{3}

A certain nut crunch cereal contains 11.0 grams of sugar (sucrose, \(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\)) per serving size of 60.0 grams. How many servings of this cereal must be eaten to consume 0.0278 moles of sugar? Equation Transcription: Text Transcription: C_{12}H_{22}O_{11}

A tube of toothpaste contains 0.76 g of sodium monofluorophosphate \(\left(\mathrm{Na}_{2} \mathrm{PO}_{3} \mathrm{~F}\right)\) in 100 mL. (a) What mass of fluorine atoms in mg was present? (b) How many fluorine atoms were present? Equation Transcription: Text Transcription: Na_2PO_3F

Calculate the following to four significant figures: (a) the percent composition of ammonia, \(\mathrm{NH}_{3}\) (b) the percent composition of photographic fixer solution ("hypo"), \(\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}\) (c) the percent of calcium ion in \(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2}\) Equation Transcription: Text Transcription: NH_3 Na_{2}S_{2}O_{3} Ca_3(PO_4)_2

Determine the following to four significant figures: (a) the percent composition of hydrazoic acid, \(\mathrm{HN}_{3}\) (b) the percent composition of TNT, \(\mathrm{C}_{6} \mathrm{H}_{2}\left(\mathrm{CH}_{3}\right)\left(\mathrm{NO}_{2}\right)_{3}\) (c) the percent of \(\mathrm{SO}_{4}{ }^{2-}\) in \(\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}\) Equation Transcription: Text Transcription: HN_3 C_{6}H_{2}(CH_3)(NO_2)_3 SO_{4}^{2-} Al_2(SO4)_3

Determine the percent ammonia, \(\mathrm{NH}_{3}\), in \(\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6} \mathrm{Cl}_{3}\), to three significant figures. Equation Transcription: Text Transcription: NH_3 Co(NH_3)_{6}Cl_3

Determine the percent water in \(\mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O}\) to three significant figures. Equation Transcription: Text Transcription: CuSO_4 cdot 5H_{2}O

Determine the molarity for each of the following solutions: (a) 0.444 mol of \(\mathrm{CoCl}_{2}$ in $0.654 \mathrm{~L}\) in 0.654 L of solution (b) 98.0 g of phosphoric acid, \(\mathrm{H}_{3} \mathrm{PO}_{4}\), in 1.00 L of solution (c) 0.2074 g of calcium hydroxide, \(\mathrm{Ca}(\mathrm{OH})_{2}\), in 40.00 mL of solution (d) 10.5 kg of \(\mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 10 \mathrm{H}_{2} \mathrm{O}\) in 18.60 L of solution (e) \(7.0 \times 10^{-3} \mathrm{~mol}\) of \(\mathrm{I}_{2}\) in 100.0 mL of solution (f) \(1.8 \times 10^{4} \mathrm{mg}\) of HCl in 0.075 L of solution Equation Transcription: Text Transcription: CoCl_2 H}_{3}PO_{4} Ca(OH)_2 Na}_{2}SO_{4} cdot 10H_{2}O 7.0 x 10^-3 I_2 1.8 x 10^4

Determine the molarity of each of the following solutions: (a) 1.457 mol KCl in 1.500 L of solution (b) 0.515 g of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) in 1.00 L of solution (c) 20.54 g of \(\mathrm{Al}\left(\mathrm{NO}_{3}\right)_{3}\) in 1575 mL of solution (d) 2.76 kg of \(\mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O}\) in 1.45 L of solution (e) 0.005653 mol of \(\mathrm{Br}_{2}\) in 10.00 mL of solution (f) 0.000889 g of glycine, \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NO}_{2}\) , in 1.05 mL of solution Equation Transcription: Text Transcription: H_{2}SO_{4} Al(NO_{3})_3 CuSO_{4} cdot 5H_{2}O Br_2 C_{2}H_{5}NO_2

Consider this question: What is the mass of the solute in 0.500 L of 0.30 \(M\) glucose, \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\), used for intravenous injection? (a) Outline the steps necessary to answer the question. (b) Answer the question. Equation Transcription: Text Transcription: M C_{6}H_{12}O_{6}

Consider this question: What is the mass of solute in 200.0 L of a 1.556-\(M\) solution of KBr? (a) Outline the steps necessary to answer the question. (b) Answer the question. Equation Transcription: Text Transcription: M

Calculate the number of moles and the mass of the solute in each of the following solutions: (a) 2.00 L of \(18.5 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}\), concentrated sulfuric acid (b) 100.0 mL of \(3.8 \times 10^{-5} M \mathrm{NaCN}\), the minimum lethal concentration of sodium cyanide in blood serum (c) 5.50 L of \(13.3 M \mathrm{H}_{2} \mathrm{CO}\), the formaldehyde used to “fix” tissue samples (d) 325 mL of \(1.8 \times 10^{-6} \mathrm{M} \mathrm{FeSO}_{4}\), the minimum concentration of iron sulfate detectable by taste in drinking water. Equation Transcription: Text Transcription: 18.5 M} {H}_{2}{SO}_4 3.8 x 10^-5 M {NaCN} 13.3 M {H}_{2}CO 1.8 x 10^-6 M {FeSO}_4

Calculate the number of moles and the mass of the solute in each of the following solutions: (a) 325 mL of \(8.23 \times 10^{-5} M \mathrm{KI}\), a source of iodine in the diet (b) 75.0 mL of \(2.2 \times 10^{-5} \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}\), a sample of acid rain (c) 0.2500 L of \(0.1135 M \mathrm{~K}_{2} \mathrm{CrO}_{4}\) an analytical reagent used in iron assays (d) 10.5 L of \(3.716 M\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4}\) a liquid fertilizer Equation Transcription: Text Transcription: 8.23 x 10^-5 M {KI} 2.2 x 10^-5 M {H}_{2}{SO}_{4} 0.1135 M {K}_{2} {CrO}_{4} 3.716 M (NH_4)_{2}SO_{4}

Consider this question: What is the molarity of \(\mathrm{KMnO}_{4}\) in a solution of 0.0908 g of \(\mathrm{KMnO}_{4}\) in 0.500 L of solution? (a) Outline the steps necessary to answer the question. (b) Answer the question. Equation Transcription: Text Transcription: KMnO_4

Calculate the molarity of each of the following solutions: (a) 0.195 g of cholesterol, \(\mathrm{C}_{27} \mathrm{H}_{46} \mathrm{O}\), in 0.100 L of serum, the average concentration of cholesterol in human serum (b) 4.25 g of \(\mathrm{NH}_{3}\) in 0.500 L of solution, the concentration of \(\mathrm{NH}_{3}\) in household ammonia (c) 1.49 kg of isopropyl alcohol, \(\mathrm{C}_{3} \mathrm{H}_{7} \mathrm{OH}\), in 2.50 L of solution, the concentration of isopropyl alcohol in rubbing alcohol (d) 0.029 g of \(\mathrm{I}_{2}\) in 0.100 L of solution, the solubility of \(\mathrm{I}_{2}\) in water at 20°C Equation Transcription: Text Transcription: C_{27} H_{46} O NH_3 NH_3 C_{3} H_{7} OH I_2 I_2

Calculate the molarity of each of the following solutions: (a) 293 g HCl in 666 mL of solution, a concentrated HCl solution (b) \(2.026 \mathrm{~g} \mathrm{FeCl}_{3}\) in 0.1250 L of a solution used as an unknown in general chemistry laboratories (c) \(0.001 \mathrm{mg} \mathrm{Cd}^{2+}\) in 0.100 L, the maximum permissible concentration of cadmium in drinking water (d) \(0.0079 \mathrm{~g} \mathrm{C}_{7} \mathrm{H}_{5} \mathrm{SNO}_{3}\) in one ounce (29.6 mL), the concentration of saccharin in a diet soft drink. Equation Transcription: Text Transcription: 2. 026 FeCl_3 0.001 mg Cd^2+ 0.0079 g C_{7}H_{5}SNO_{3}

There is about 1.0 g of calcium, as \(\mathrm{Ca}^{2+}\), in 1.0 L of milk. What is the molarity of \(\mathrm{Ca}^{2+}\) in milk? Equation Transcription: Text Transcription: Ca^2+ Ca^2+

What volume of a \(1.00-\mathrm{M} \mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{3}\) solution can be diluted to prepare 1.00 L of a solution with a concentration of \(0.250 M\)? Equation Transcription: Text Transcription: 100 - M Fe(NO)_3 0.250 M

If 0.1718 L of a \(0.3556-\mathrm{M} \mathrm{C}_{3} \mathrm{H}_{7} \mathrm{OH}\) solution is diluted to a concentration of \(0.1222 M\), what is the volume of the resulting solution? Equation Transcription: Text Transcription: 0.3556 - M C_{3}H_{7}OH 1222 M

If 4.12 L of a \(0.850 \mathrm{M}-\mathrm{H}_{3} \mathrm{PO}_{4}\) solution is be diluted to a volume of 10.00 L, what is the concentration of the resulting solution? Equation Transcription: Text Transcription: 0.850 M - H_{3}PO_{4}

What volume of a \(0.33-M \mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\) solution can be diluted to prepare 25 mL of a solution with a concentration of \(0.025 M\)? Equation Transcription: Text Transcription: 0.33 M - C_{12}H_{22}O_{11} 0.025 M

What is the concentration of the NaCl solution that results when 0.150 L of a \(0.556-M\) solution is allowed to evaporate until the volume is reduced to 0.105 L? Equation Transcription: Text Transcription: 0.556 - M

What is the molarity of the diluted solution when each of the following solutions is diluted to the given final volume? (a) 1.00 L of a \(0.250-M\) solution of \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{3}\) is diluted to a final volume of 2.00 L (b) 0.5000 L of a \(0.1222-M\) solution of \(\mathrm{C}_{3} \mathrm{H}_{7} \mathrm{OH}\) is diluted to a final volume of 1.250 L (c) 2.35 L of a \(0.350-M\) solution of \(\mathrm{H}_{3} \mathrm{PO}_{4}\) is diluted to a final volume of 4.00 L (d) 22.50 mL of a \(0.025-M\) solution of \(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\) is diluted to 100.0 mL Equation Transcription: Text Transcription: 0.250-M Fe(NO_3)_3 0.1222 - M C_{3}H_{7}OH 0.350 - M H_{3}PO_{4} 0.025 - M C_{12}H_{22}O_{11}

What is the final concentration of the solution produced when 225.5 mL of a \(0.09988-M\) solution of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is allowed to evaporate until the solution volume is reduced to 45.00 mL? Equation Transcription: Text Transcription: 0.09988 - M Na_{2}CO_{3}

An experiment in a general chemistry laboratory calls for a \(2.00-M\) solution of HCl. How many mL of \(11.9 M\) HCl would be required to make 250 mL of \(2.00 M\) HCl? Equation Transcription: Text Transcription: 2.00 - M 11.9 M 2.00 M

What volume of a \(0.20-M \mathrm{~K}_{2} \mathrm{SO}_{4}\)solution contains 57 g of \(\mathrm{K}_{2} \mathrm{SO}_{4}\)? Equation Transcription: Text Transcription: 0.20 - M K_{2}SO_{4} K_{2}SO_{4}

The US Environmental Protection Agency (EPA) places limits on the quantities of toxic substances that may be discharged into the sewer system. Limits have been established for a variety of substances, including hexavalent chromium, which is limited to 0.50 mg/L. If an industry is discharging hexavalent chromium as potassium dichromate \(\left(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\right)\), what is the maximum permissible molarity of that substance? Equation Transcription: Text Transcription: (K_{2}Cr_{2}O_{7})

Consider this question: What mass of a concentrated solution of nitric acid (68.0% \(\mathrm{HNO}_{3}\) by mass) is needed to prepare 400.0 g of a 10.0% solution of \(\mathrm{HNO}_{3}\) by mass? (a) Outline the steps necessary to answer the question. (b) Answer the question. Equation Transcription: Text Transcription: HNO_3 HNO_3

What mass of HCl is contained in 45.0 mL of an aqueous HCl solution that has a density of \(1.19 \mathrm{~g} \mathrm{~cm}^{-3}\) and contains 37.21% HCl by mass? Equation Transcription: Text Transcription: 1.19 g cm^-3

The hardness of water (hardness count) is usually expressed in parts per million (by mass) of \(\mathrm{CaCO}_{3}\), which is equivalent to milligrams of \(\mathrm{CaCO}_{3}\) per liter of water. What is the molar concentration of \(\mathrm{Ca}^{2+}\) ions in a water sample with a hardness count of \(175 \mathrm{mg} \mathrm{CaCO}_{3} / \mathrm{L}\)? Equation Transcription: Text Transcription: CaCO_3 CaCO_3 Ca^2+ 175 mg CaCO_3/L

In Canada and the United Kingdom, devices that measure blood glucose levels provide a reading in millimoles per liter. If a measurement of \(5.3 \mathrm{~m} M\) is observed, what is the concentration of glucose \(\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)$ in $\mathrm{mg} / \mathrm{dL}\) ? Equation Transcription: Text Transcription: 5.3 mM (C_{6}H_{12}O_{6})

A throat spray is 1.40% by mass phenol, \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH}\), in water. If the solution has a density of 0.9956 g/mL, calculate the molarity of the solution. Equation Transcription: Text Transcription: C_{6}H_{5}OH

A cough syrup contains 5.0% ethyl alcohol, \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\), by mass. If the density of the solution is 0.9928 g/mL, determine the molarity of the alcohol in the cough syrup. Equation Transcription: Text Transcription: C_{2}H_{5}OH

D5W is a solution used as an intravenous fluid. It is a 5.0% by mass solution of dextrose \(\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)\) in water. If the density of D5W is 1.029 g/mL, calculate the molarity of dextrose in the solution. Equation Transcription: Text Transcription: (C_{6}H_{12}O_{6})

Find the molarity of a 40.0% by mass aqueous solution of sulfuric acid, \(\mathrm{H}_{2} \mathrm{SO}_{4}\), for which the density is 1.3057 g/mL. Equation Transcription: Text Transcription: H_{2}SO_{4}

Determine the molecular mass of the following compounds: (a) (b) (c) (d)

Determine the molecular mass of the following compounds: (a) (b) (c) (d)

Write a sentence that describes how to determine the number of moles of a compound in a known mass of the compound using its molecular formula.

How are the molecular mass and the molar mass of a compound similar and how are they different?

Diamond is one form of elemental carbon. An engagement ring contains a diamond weighing 1.25 carats (1 carat = 200 mg). How many atoms are present in the diamond?

The Cullinan diamond was the largest natural diamond ever found (January 25, 1905). It weighed 3104 carats (1 carat = 200 mg). How many carbon atoms were present in the stone?

One 55-gram serving of a particular cereal supplies 270 mg of sodium, 11% of the recommended daily allowance. How many moles and atoms of sodium are in the recommended daily allowance?

Which of the following represents the least number of molecules? (a) \(20.0 \mathrm{~g}$ of $\mathrm{H}_{2} \mathrm{O}(18.02 \mathrm{~g} / \mathrm{mol})\) (b) \(77.0 \mathrm{~g}$ of $\mathrm{CH}_{4}(16.06 \mathrm{~g} / \mathrm{mol})\) (c) \(68.0 \mathrm{~g}$ of $\mathrm{CaH}_{2}(42.09 \mathrm{~g} / \mathrm{mol})\) (d) \(100.0 \mathrm{~g}$ of $\mathrm{N}_{2} \mathrm{O}(44.02 \mathrm{~g} / \mathrm{mol})\) (e) 84.0 g of HF (20.01 g/mol) Equation Transcription: Text Transcription: 20.0 g of H_{2}O (18.02 g/mol) 77.0 g of CH_4 (16.06 g/mol) 68.0 g of CaH_2 (42.09 g/mol) 100.0 g of N_{2}O (44.02 g/mol)

What information is needed to determine the molecular formula of a compound from the empirical formula?

Determine the empirical formulas for compounds with the following percent compositions: (a) 15.8% carbon and 84.2% sulfur (b) 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen

Determine the empirical formulas for compounds with the following percent compositions: (a) 43.6% phosphorus and 56.4% oxygen (b) 28.7% K, 1.5% H, 22.8% P, and 47.0% O

A compound of carbon and hydrogen contains 92.3% C and has a molar mass of 78.1 g/mol. What is its molecular formula?

Dichloroethane, a compound that is often used for dry cleaning, contains carbon, hydrogen, and chlorine. It has a molar mass of 99 g/mol. Analysis of a sample shows that it contains 24.3% carbon and 4.1% hydrogen. What is its molecular formula?

Determine the empirical and molecular formula for chrysotile asbestos. Chrysotile has the following percent composition: 28.03% Mg, 21.60% Si, 1.16% H, and 49.21% O. The molar mass for chrysotile is 520.8 g/mol.

Polymers are large molecules composed of simple units repeated many times. Thus, they often have relatively simple empirical formulas. Calculate the empirical formulas of the following polymers: (a) Lucite (Plexiglas); 59.9% C, 8.06% H, 32.0% O (b) Saran; 24.8% C, 2.0% H, 73.1% Cl (c) polyethylene; 86% C, 14% H (d) polystyrene; 92.3% C, 7.7% H (e) Orlon; 67.9% C, 5.70% H, 26.4% N

A major textile dye manufacturer developed a new yellow dye. The dye has a percent composition of 75.95% C, 17.72% N, and 6.33% H by mass with a molar mass of about 240 g/mol. Determine the molecular formula of the dye.

Explain what changes and what stays the same when 1.00 L of a solution of NaCl is diluted to 1.80 L.

What information is needed to calculate the molarity of a sulfuric acid solution?

A 200-mL sample and a 400-mL sample of a solution of salt have the same molarity. In what ways are the two samples identical? In what ways are these two samples different?

Consider this question: What is the molarity of HCl if 35.23 mL of a solution of HCl contain 0.3366 g of HCl? (a) Outline the steps necessary to answer the question. (b) Answer the question.

A 2.00-L bottle of a solution of concentrated HCl was purchased for the general chemistry laboratory. The solution contained 868.8 g of HCl. What is the molarity of the solution?

What mass of a 4.00% NaOH solution by mass contains 15.0 g of NaOH?

What mass of solid NaOH (97.0% NaOH by mass) is required to prepare 1.00 L of a 10.0% solution of NaOH by mass? The density of the 10.0% solution is 1.109 g/mL.

The level of mercury in a stream was suspected to be above the minimum considered safe (1 part per billion by weight). An analysis indicated that the concentration was 0.68 parts per billion. Assume a density of 1.0 g/mL and calculate the molarity of mercury in the stream.

Copper(I) iodide (CuI) is often added to table salt as a dietary source of iodine. How many moles of CuI are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI by mass?