What 2 things do the planets need to have in order to stay in orbit and rotate?

4. Why did you take the average of 3 readings--why not 1 reading, or 10? Turbine experiment.

True or false most oils tend to dissolve best in non polar solvent?

Increasing the concentration increases the speed of reaction by

Why is the net charge of the nucleus positive?

A Subatomic particle that has negative charge is called an

4*C: 4cm 8*C: 10cm 12*C: 14cm 16*C: 18cm 20*C:24cm 24*C: 12cm what is the independent variable, dependent variable and three constant variables?

In the chemical laboratory, why do scientists use a mortar and pestle? a. to increase surface area of a solute b. to decrease surface area of a solute c. to increase temperature of a solute d. to decrease temperature of a solute

Is a mixture being separated into two elements a chemical change

Which electrons are lost by an atom of iron when it forms the Fe3 + ion? A. One s orbital electron and two d orbital electrons B. Two s orbital electrons and one d orbital electron C. Three s orbital electrons D. Three d orbital electrons

What does a three letter chemical symbol mean