My account was charged for a year and my son thought it was on $2 a month and my account was charged for a full year he only needed it for a month how do i get a refund

Find the mass in grams of hydrogen gas produced when 14.0 moles of hcl is added to an excess amount of magnesium.

What is the correct equation for cellular respiration?

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.