1) 2.50L (V1) of helium has a pressure of 1.10atm (P1) and is held under isothermic conditions (constant temperature) in a closed container (nl=n2). What is the pressure
of the gas (in atmospheres) if the volume is reduced to 1.05L (V2) ?

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?

37.0 °c = °f (human body normal temperature)

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas