How many grams of a 7.50% by mass calcium nitrate solution are needed to obtain 3.75 grams of calcium nitrate ?

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2

How do you interpret a chromatogram for what mixtures contain?