An object has a mass of 0.124 kg and a volume of 1893 mm. What is its density in grams per cubic centimeter?

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)

What is the mass of 4 molecules of co2

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure