A student visits the beach during a very hot day. She steps on the sand and jumps because it is so hot. Which type of heat transfer is demonstrated by the sand in this example?

transmission

radiation

conduction

convection

This is science but I didn't see it where it says to choose subject.

What type(s) of intermolecular forces are expected between ch3ch2cooh molecules? dipole forces, induced dipole forces, hydrogen bonding

How many grams of mgbr2 are needed to produce 75g or metal?

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.