13. Air is 79% N2 and 21% O2 by volume. Calculate the density of air at 1.0 atm, 25°C. (A) 0.590 g/L (B) 1.18 g/L (C) 2.46 g/L (D) 14.1 g/L

18. A calorimeter contains 123 g of water at 27.0°C. A block of metal with a mass of 28 g is heated to 95.8°C and then placed in the water in the calorimeter. After sufficient time, the temperature of the water is measured and found to be 28.8°C. Calculate the heat capacity per gram of metal. Assume no heat is lost to the calorimeter or the surroundings. (A) 2.0 J/g°C (B) 0.12 J/g°C (C) 6.8×102 J/g°C (D) 0.49 J/g°C

13. Air is 79% N₂and 21% O₂ by volume. Calculate the density of air at 1.0 atm, 25°C.
(A) 0.590 g/L
(B) 1.18 g/L
(C) 2.46 g/L
(D) 14.1 g/L

相關試題

相關試卷

13. Air is 79% N2 and 21% O2 by volume. Calculate the density of air at 1.0 atm, 25°C.(A) 0.590 g/L(B) 1.18 g/L(C) 2.46 g/L(D) 14.1 g/L

相關試題

相關試卷

13. Air is 79% N₂and 21% O₂ by volume. Calculate the density of air at 1.0 atm, 25°C.
(A) 0.590 g/L
(B) 1.18 g/L
(C) 2.46 g/L
(D) 14.1 g/L