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What is the mass of 0.71 mol Na? 1.2 times 10^-24 g 0.031 g 32 g 12 g 16 g What is the mass percent of chlorine in magnesium chloride? 74.47% 37.24% 59.33% 40.67% 25.53% You have 2.50 g of each of the following elements: Ca, Cu, Cs, C, and Cr. Which sample contains the largest number of atoms? Cr Cs Cu Ca C The speed of sound at one atmosphere of pressure is 0.214 miles per second. What is the speed of sound in units of meters per second? (1 km = 0.621 mile) 345 m/s 4.78 times 1 0^5 m/s 133 m/s 478 m/s 4.46 times 10^4 m/s Calculate the number of moles in 0.48 g Cu. 0.48 mol 7.6 times 10^-3 mol 0.033 mol 31 mol 1.3 times 10^2 mol If the fuel efficiency of an automobile is 32 miles per gallon, what is its fuel efficiency in kilometers per liter? (1 km = 0.621 mile, 1.000 L = 1.057 quarts, 4 quarts = 1 gallon) 5.3 km/L 2.0 times 10^2 km/L 75 km/L 20 km/L 14 km/L What is the net ionic equation for the reaction of aqueous hydrochloric acid and aqueous potassium hydroxide? HCl(aq) + KOH(aq) rightarrow KCl(aq) + H_2 O(l) Cl^-(aq) + K^+ (aq) rightarrow KCl(s) Cl^- (aq) + K^+ (aq) rightarrow KCl(aq) H^+ (aq) + OH^- (aq) rightarrow H_2 O (l) HCl(aq) + OH^-(aq) rightarrow H_2 O (l) + Cl^- (aq) What are the spectator ions in the reaction between aqueous hydrobromic acid and aqueous sodium hydroxide? H^+ and OH^- Na^+ only Na^+ and Br H^+, Br, Na^+, and OH Br only
What is the mass of 0.71 mol Na? 1.2 times 10^-24 g 0.031 g 32 g 12 g 16 g What is the mass percent of chlorine in magnesium chloride? 74.47% 37.24% 59.33% 40.67% 25.53% You have 2.50 g of each of the following elements: Ca, Cu, Cs, C, and Cr. Which sample contains the largest number of atoms? Cr Cs Cu Ca C The speed of sound at one atmosphere of pressure is 0.214 miles per second. What is the speed of sound in units of meters per second? (1 km = 0.621 mile) 345 m/s 4.78 times 1 0^5 m/s 133 m/s 478 m/s 4.46 times 10^4 m/s Calculate the number of moles in 0.48 g Cu. 0.48 mol 7.6 times 10^-3 mol 0.033 mol 31 mol 1.3 times 10^2 mol If the fuel efficiency of an automobile is 32 miles per gallon, what is its fuel efficiency in kilometers per liter? (1 km = 0.621 mile, 1.000 L = 1.057 quarts, 4 quarts = 1 gallon) 5.3 km/L 2.0 times 10^2 km/L 75 km/L 20 km/L 14 km/L What is the net ionic equation for the reaction of aqueous hydrochloric acid and aqueous potassium hydroxide? HCl(aq) + KOH(aq) rightarrow KCl(aq) + H_2 O(l) Cl^-(aq) + K^+ (aq) rightarrow KCl(s) Cl^- (aq) + K^+ (aq) rightarrow KCl(aq) H^+ (aq) + OH^- (aq) rightarrow H_2 O (l) HCl(aq) + OH^-(aq) rightarrow H_2 O (l) + Cl^- (aq) What are the spectator ions in the reaction between aqueous hydrobromic acid and aqueous sodium hydroxide? H^+ and OH^- Na^+ only Na^+ and Br H^+, Br, Na^+, and OH Br only
Elin HesselLv2
30 May 2019