What mass of magnesium chloride is in .825 L of a 1.50 M mgcl2 solution

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Can someone me with 1 to 4 plz. fast

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.