Where is the most of the mass of an atom located?

A) in the nucleus

B) in the orbits

C) in the electrons

D) its split between the nucleus and the orbits

What happens in a stationary front? A. A warm air mass collides with a stationary cold air mass, and slides under it B. A warm air mass catches up to a moving cold air mass, sliding over it C.

During what phase of mitosis do the chromosomes pull apart and begin to form two new cells?

If a body of water has high turbidity levels, what can most likely be concluded? A. It has a low pH. B. It is unsafe to drink. C. It is too hot to drink. D. It contains a lot of chemicals.

T/F If the change in enthalpy is positive, ΔH > 0, and the reaction is endothermic.

Which of the following describes the process of deflation? A. The surfaces of mountains are stripped of trees. B. Hurricanes destroy natural wind barriers. C. The wind removes surface particles, resulting in lower land surface. D.

Explain why ships traveling from east to west across the Atlantic take days longer than ships traveling the same distance from west to east.

In a titration 25.0 ml of a. 20 M NaOH solution is used to neutralize 10.0 ml of HCl. Write the equation for this neutralization reaction and calculate the molarity of the acid.

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