ZAG2017
contestada

PLEASE HALP ASAP!!!!! 
1) Which of these is a chemical property of a substance?
1-reactivity
2-color
3-boiling point
4-melting point

2) Which of these is true of a chemical reaction?
1-Energy is always transferred from reactants to products.
2-Energy is always transferred from reactants to reactants
3-Energy is transferred between products and reactants.
4-Energy is not transfered.

3) Which of these is an example of physical change?
1-melting a substance
2-breaking chemical bonds
3-forming chemical bonds
4-nuclear decay

4) Which of these is an example of a chemical change?
1-cutting bread
2-spreading peanut butter
3-digesting a sandwich
4-stirring jelly

5) Which of these is an example of a physical change?
1-gasoline burning
2-metal denting
3-iron rusting
4-silver tarnishing

Q&A Education