Two ideal gases have the same mass density and the same absolute pressure. one of the gases is helium (he), and its temperature is 175 k the other gas is neon (ne). what is the temperature of the neon?

Temperature of neon gas = 875 K

Explanation:

Using Ideal gas equation as:

PV=nRT

Where,

P is the pressure of the gas

V is the volume of the gas

n is the number of moles

R is the gas constant

T is the temperature

Also,

The ideal gas equation can be written as:

Thus,

As Density and Pressure is constant , We only consider molar mass and Temperature which are directly proportional according to the equation above as:

Data given for He:

Temperature (T₁) = 175 K

Molar mass of He (M₁)= 4 g/mol

For Ne:

Temperature (T₂)= ?

Molar mass of He (M₂)= 20 g/mol

Applying in the equation,

Temperature of neon gas = 875 K

b) phosphorus pentoxide

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.