Which statement explains why a rock does not sink in a lake that is frozen over? 1. Particles are much harder in a solid than in a liquid.

2. Particles are much closer together in a solid than in a liquid.

3. Particles in a solid are moving too fast for anything to penetrate them.

4. Particles in a solid are fixed in place.

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3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11