What type of reaction is: ch4 + 2o2 → co2 + 2h2o + 218 kcal? an exothermic reaction a combination reaction a decomposition reaction an endothermic reaction a single replacement reaction?

A solution is made by adding 50 grams of gelatin to 400 grams of water. What is the mass % of water in the sample?

Steam is escaping froma teapot. is this a chemical reaction? explain.

Concentration is just one stress that can affect the equilibrium position. Another is temperature. Describe how you would design this experiment to test for the effects of temperature on equilibrium position.

What is an example of a physical change? A: having less ash than the paper that was burned to form it B: ice forming and then melting back into water C: rust having a different identity than the iron it forms on D: the irreversible reaction of

Describe haw serface area affects the rate of a reaction

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda