Stoichiometry : 2 AlCl3 + 3 MgSO4 --> Al2(SO4)3 + 3 MgCl2 If 633.1 g AlCl3 reacts, how many moles of MgCl2 are formed?

What happens to energy in an open system?

A155.0 9 piece of copper at 182 °c is dropped into 2500 g of water at 23.9 °c. (the specific heat of copper is 0.385 1/9°c.) calculate the final temperature of the mixture. (assume no heat loss to the surroundings.)

Use the periodic table and your knowledge of isotopes to complete these statements. when polonium-210 emits an alpha particle, the child isotope has an atomic mass of 1-131 undergoes beta-minus decay. the chemical symbol for the new element is fluorine-18 undergoes beta-plus decay. the child isotope has an atomic mass of done intro donne