Calcule el volumen de reactivo concentrado requerido para preparar las disoluciones diluidas indicadas: a) H3PO4 15 M para preparar 750 mL de H3PO4 3.0 M
b) HNO3 16 M para preparar 250 mL de HNO3 0.50 M

What is the molar mass of ca(cio4)2

The characteristics 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 an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?