Which process is a chemical change?

1. freezing of liquid water to solid ice

2. condensation of gaseous steam to liquid water

3. boiling of liquid water to gaseous steam

4. decomposing of water to hydrogen gas and oxygen gas

Which is an organic molecule

By using the titration technique, what can be determined about a given substance?

What is the independent variable; how does salt change the temperature at which water freezes?

A radioactive isotope of the element potassium decays to produce argon. If the ratio of the number of argon to potassium atoms is found to be 7:1, how many half-lives have occurred since the sample of radioactive potassium started to decay

If the farmer had weighed out 32.0 pounds of chicken eggs rather than kilograms what mass of quail eggs would he need to weigh out to have the same number of eggs in both samples

Which group of elements belongs to the f-block? O metalloids O inner transition metals O metals O nonmetals

When you open a bottle of a soft drink and leave it open, the drink eventually goes flat. this happens because the equilibrium between carbonic acid and carbon dioxide shifts to produce?

When you go down a group, does the tendency for a metal to react (become duller) increase or decrease?

The force of gravity on Planet B is 3.4 m/sec2. A box weighs 34 N on Earth. What is the mass of the box? a) 3.47 kg b) 333.2 kg c) 115.6 kg d) 10 kg

Assume that 4 molecules of nitrogen and 9 molecules of hydrogen are present? after complete reaction, how many molecules of ammonia are proceded?