12. In line 13, what is the purpose for the ellipsis?

a. to indicate omitted text

b. to indicate a slight pause

C. to indicate a mood change

d. to indicate an unstated thought

Give two reasons why fusion could be a better energy source than fission

2H2O2 → 2H2O + O2 synthesis decomposition combustion

Two solids, A and B, are located in the same family on the periodic table. A sample of each is placed in a beaker of HCL. Substance A produces few bubbles, while substance B bubbles vigorously.

When forces attracting solvent particles to each other are broken what is provided for a solution. 1. Energy for the solute to precipitate 2. Space for the solute in the solvent 3. Inertia for the solute to move into the solvent 4.

In any chemical reaction, reactants and products will always what?

Q. 1 What is one joule work?

Identify each of the following equations as which type of chemical reaction? C12 + Nal - - NaCL + 12

Give some examples of pure chemical substances. give some examples of pure chemical substances. gasoline soda water and brass bronze and brass sugar, carbon dioxide, and water

The winner of a 10 km road race took half an hour to complete the race. Calculate her average speed. Give your answer in metres per second.

How might sharing data gathered by different regions allow scientists to better predict the weather.