A gas system has volume, moles and temperature of 7.13L, 0.287moles and 545K, respectively. What is the pressure in atm?
O 1370 atm
O 0.555 atm
O 1.80 atm
O 7.31 atm

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o