[bobfrommars]

I really need these questions answered. Any help is appreciated


Sodium bicarbonate is reacted with concentrated hydrochloric acid at 37.0°C and 1.00 atm. The
reaction of 6.00 kg of bicarbonate with excess hydrochloric acid under these conditions will
produce __________ L of CO2.

The density of air at STP is 1.285 g/L. Which of the following cannot be used to fill a balloon that
will float in air at STP?
A) NO B) NH3 C) HF D) CH4 E) Ne

The average kinetic energy of the particles of a gas is directly proportional to __________.
A) the rms speed
B) the square of the rms speed
C) the square of the particle mass
D) the particle mass
E) the square root of the rms speed

A mixture of Xe, Kr, and Ar has a total pressure of 6.70 atm. What is the mole fraction of Kr if the
partial pressures of Xe and Ar are 1.60 atm and 2.80 atm, respectively.
A) 0.256 B) 0.174 C) 0.343 D) 0.481 E) 0.570

At STP, the ratio of the root-mean-square speed of CO2 to that of SO2 is
A) 1.000 B) 1.456 C) 2.119 D) 1.207 E) 2.001