HEL Match the chemical equations to the appropriate types of chemical reactions

1. 8Cu + S8-8 Cus (synthesis or decomposition reaction)

2. P4 +502-2P205 (synthesis or decomposition reaction)

3. BaCO3-BaO + CO2 (synthesis or decomposition reaction)

4. KCIO3—KCI + O2 (synthesis or decomposition reaction)

5. 8Fe + S8- 8Fes (synthesis or decomposition reaction)

6. H2CO3—H2O + CO2 (synthesis or decomposition reaction)

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

0.66y = 0.9x + 0.48 if y has a value of 108.45 what is the value of x?

What is the density of the black hole