Direded Reading for Section 2 .Rates of Chemical Content Mastery Reactions Directions. Write the word true in the space next to each w statement that is true. The statement is tale rewrite the statement to make it true on the lines provided

1. A change in state is a physical change.

2. Catalysts speed chemical reactions but are not changed by them.

3. Heat, light, or change in odor can indicate a physical change. Meeting Individual Needs

4. Activation energy is the minimum for reactions to start

5. Cold acually speeds up reaction rates.

6. A low concentration of a chemical slows reaction rate,

7. Chemical reactions occur at the same rate no matter what the size of the reactant partides​

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer