What will happen to the density of a substance if it contracts when it freezes?

1. density will decrease

2. density will increase

3. density will remain the same

4. change in density cannot be predicted

When can a metal replace another metal in a single displacement reaction? Any element can always replace another element. A metal can replace any element that is below it in the activity series. When it is larger in atomic mass.

What term described the movement of around the once a year

If you pump air into cycle tyre a slight warming effect is noticed at valve stem why

If 0.05 L of gas at a pressure of 250 atm decreases the pressure to 50.0 atm, what will the new volume be?

A 2g sample of crystals dissolve very slowly in 100mL of water while the water is stirred. Which of these would cause the crystals to dissolve faster?

How can a chemical reaction be sped up? Pack in more of the reactant to increase the_.

How does a mixture of benzoic acid and benzaldehyde can be isolated separately by extractions?

What is a compound? a) a combination of two or more substances that are not chemically combined b) a combination of two or more elements that are combined in a certain ratio

A gas has a volume of 75mL at a pressure of 200.0 kPa. What will be the new volume be in mL if the pressure is decreased to 60.0 kPa in sig figs

Give two reasons why it's important to work with a partner in a lab