K3PO4(aq) + Ca(s) --> Ca3(PO4)2(aq) + K(aq) In a balanced equation, what is the coefficient in front of
Ca3(PO4)2?

A. 2.
B. 6
C. no valid answer
D. 3
E. 1/no coefficient

What are the resulting coefficients when you balance the chemical equation for the combustion of ethane, c2h6? in this reaction, ethane is burned in the presence of oxygen (o2) to form carbon dioxide (co2) and water (h2o). (g)+(g)→(g)+(g)

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate

Who discovered a pattern to the elements in 1869?