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19 Nov 2019
A 25.0 mL simple of 0.15 M silver nitrate is reacted with a 3.58 g of calcium chloride Which of the following statements is true? a) Silver nitrate is the limiting reactant and calcium nitrate precipitates. b) Silver nitrate is the limiting reactant and silver chloride precipitates. c) Calcium chloride is the limiting reactant and calcium nitrate precipitates d) Calcium chloride is the limiting reactant and silver chloride precipitates. e) No reaction occurs. When a metal is placed in water, what is experimental evidence that a reaction occurred? a) pink color of solution upon addition of phenolphthalein b) bubbles c) a solid precipitate forms d) both "a" and "b" e) none of the above, metals do not react with water Caffeine has an elemental analysis of 49.48% C, 5.190% H, 16.47% O, and 28.85% N. It has a molar mass of 194.19 g/mol. What is the molecular formula of caffeine? a) C_4 H_5 N_2 O b) C_8 H_10 N_4 O_2 c) C_10 H_14 N_2 O_2 d) C_6 H_6 NO_2 e) C_5 H_7 NO Gasoline (which can be written as C_8 H_18) undergoes a reaction when a car is driven. How much CO_2 is produced by a car driven 20.000 miles? Assume that a car gets 20 mi/4.0 L of gasoline. One liter of gasoline has a mass of 0.8 kg. 2c_8 H_18 + 25 O_2 rightarrow 16 CO_2 + 18H_2 O a) 1, 500 kg b) 9, 900 kg c) 15,000 kg d) 20,000 kg e) 4, 900 kg Metallic copper can be obtained from mineral chalcocite (Cu_2 S). What is the mass percent of copper in chalcocite? a) 79.85% b) 66.46% c) 20.15% d) 33.54% e) 57.47% Manganese(IV) oxide is a brown insoluble solid often found as a product of reactions of potassium permanganate. What is the formula of manganese(IV) oxide? a) Mn_4 O b) MnO_4 c) MnO_2 d) Mn(IV)O e) Mn_2 O_2
A 25.0 mL simple of 0.15 M silver nitrate is reacted with a 3.58 g of calcium chloride Which of the following statements is true? a) Silver nitrate is the limiting reactant and calcium nitrate precipitates. b) Silver nitrate is the limiting reactant and silver chloride precipitates. c) Calcium chloride is the limiting reactant and calcium nitrate precipitates d) Calcium chloride is the limiting reactant and silver chloride precipitates. e) No reaction occurs. When a metal is placed in water, what is experimental evidence that a reaction occurred? a) pink color of solution upon addition of phenolphthalein b) bubbles c) a solid precipitate forms d) both "a" and "b" e) none of the above, metals do not react with water Caffeine has an elemental analysis of 49.48% C, 5.190% H, 16.47% O, and 28.85% N. It has a molar mass of 194.19 g/mol. What is the molecular formula of caffeine? a) C_4 H_5 N_2 O b) C_8 H_10 N_4 O_2 c) C_10 H_14 N_2 O_2 d) C_6 H_6 NO_2 e) C_5 H_7 NO Gasoline (which can be written as C_8 H_18) undergoes a reaction when a car is driven. How much CO_2 is produced by a car driven 20.000 miles? Assume that a car gets 20 mi/4.0 L of gasoline. One liter of gasoline has a mass of 0.8 kg. 2c_8 H_18 + 25 O_2 rightarrow 16 CO_2 + 18H_2 O a) 1, 500 kg b) 9, 900 kg c) 15,000 kg d) 20,000 kg e) 4, 900 kg Metallic copper can be obtained from mineral chalcocite (Cu_2 S). What is the mass percent of copper in chalcocite? a) 79.85% b) 66.46% c) 20.15% d) 33.54% e) 57.47% Manganese(IV) oxide is a brown insoluble solid often found as a product of reactions of potassium permanganate. What is the formula of manganese(IV) oxide? a) Mn_4 O b) MnO_4 c) MnO_2 d) Mn(IV)O e) Mn_2 O_2
Hubert KochLv2
19 Nov 2019
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