How many moles (of molecules or formula units) are in each sample? a) 1.96 kg CO2
b) 37.0 g KNO3
c) 111.9 kg Na2SO4
Express your answer to three significant figures and include the appropriate units.

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)

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products