How many moles of silane gas (SiH4) are present in 8.68 mL
measured at 18 0C and 1.50 atm?

Alarge marble is dropped in a graduated cylinder with 35ml of water in it.the water level increases to 49ml.what is the volume of the marble

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate