What is the pressure (in atm) of 0.0255 moles of gas if it has a volume of 105.2 mL at a temperature of 45?

The rock in a lead ore deposit contains 89 % pbs by mass. how many kilograms of the rock must be processed to obtain 1.5 kg of pb?

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have