The universe is mostly made up of what?

A rock bounces down a mountain. When will its kinetic energy be greatest?

The empirical formula for this compound that contain 31.14%sulfur and 68.86%chlorine by mass

If a metal changes color over time from exposure to air, what has likely occurred? a) a chemical change b) a reversible change c) a change of state d) a physical change

Describe a method to calculate the average atomic mass of the sample in the previous question using only the atomic masses of lithium - 6 and lithium - 7 without using the simulation.

What is the difference between matter, mass, and volume?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda