Complete the following equations

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]