How many moles of hydrogen are needed to produce 8 moles of methane CH4? C + H2-> CH4

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %