3ml is equal to:

3 l
3 cm2
3 cm3

What is the relation between concentration of reactants and the rate of chemical reaction?

What is the solubility of substance?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.