How many joules of heat are needed to completely vaporize 24.40 grams of water at its boiling point? Given ΔHvap = 40.6 kJ/mol? I'm very stuck if someone can help me step by step that would be great.

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

What is the formula of the ionic compound composed of calcium cations and chloride anions

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?