1. for a chemical reaction to occur,
a. chemical bonds must break
b. aoms must rearrange
c. new bonds must form
d. all of the above
2. A ______ indicates the chemical makeup of a substance by showing how many of each kind of atom is present in a molecule.
a. chemical symbol
b. chemical formula
c. chemical reaction
d. chemical change
3. Increasing the concentration ____ the number of reactant particles present and ____ the distance between them.
a. increase, increase
b. increase, decrease
c. decrease, increase
d. decrease, decrease
2007-02-22 14:01:44 · 4 answers · asked by jennifer 1 in Science & Mathematics ➔ Chemistry
1. all of the above occurs- in that order.
2. Chemical makeup is represented by a symbol with subscripts which is called a formula like H2O.
3. If coffee is more concentrated, it's stronger, because you increase the # of particles. If you increase the # of particles, it's more crowded! Less room to move around, right?
2007-02-22 14:14:30 · answer #1 · answered by b 3 · 0⤊ 0⤋
1. D although all 3 don't necessarily happen for each chemical reaction.
2. B
3. B
2007-02-22 22:12:08 · answer #2 · answered by John B 2 · 0⤊ 0⤋
these questions are actually very easy. next time try looking them up
the answers are d, b, and b
2007-02-22 22:05:22 · answer #3 · answered by Anonymous · 0⤊ 0⤋
a b b
2007-02-22 22:07:40 · answer #4 · answered by 987654321abc 5 · 0⤊ 1⤋