What is a level 7-8 grade science fair project I can do?

How does weight influence the sliding force of friction

Put the following events and discoveries into the correct chronological order. 1 Albert Einstein: photoelectric effect 2 Ernest Rutherford: discovery of the nucleus 3 Niels Bohr: planetary model 1, 2, 3 1, 3, 2 2, 3, 1 2, 1, 3

2. Lead (IV) carbonate

An analysis of 5.0 grams of a sample of a compound is found to contain 1.6 percent hydrogen (H), 22.2 percent nitrogen (N), and 76.2 percent oxygen (O). Determine the empirical formula of the compound.

If you dissolve 23 g of ammonium chloride in 500.0 mL of water, what is the molar concentration of the solution?

What does berkelium react with

Classifying living things

Find the parent acid and parent base of al2 (co33, determine if they are strong or weak, and determine if the salt is acidic, basic, neutral, or unpredictable.

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure. A second syringe contains 473 mL of N2 at 298 K and 2.6 atm. What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at 0.00°C?

Which pair of elements can form an ionic compound? A) Two atoms of hydrogen B) One atom of sodium and one atom of fluorine C) One atom of calcium and one atom of chlorine D) Two atoms of hydrogen and one atom of oxygen