What are the empirical formula and empirical formula mass for Mg3(PO4)2?

Which of the following units is not an official si unit? mole liter kilogram ampere

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c

Which one of the following is an oxidation-reduction reaction? naoh + hno3 --> h2o + kno3 naoh + hno3 --> h2o + kno3 so3 + h2o --> h2so4 cacl2 + na2co3 --> caco3 + 2 nacl ch4 + 2 o2 --> co2 + 2 h2o al2(so4)3 + 6 koh --> 2 al(oh)3 + 3 k2so4