If you hold a box with a mass of 50kg for 5 hours how much work have you done

Which is a sign of chemical change? A. chocolate syrup dissolve in milk B. folding paper changes the size C. toast smells different than bread

How can you tell from the name the types of bonds present in a hydrocarbon?

Which has more energy water at 100°C or water vapor at 100°C

All of the following are possible sources of error in a scientific investigation except for O measuring materials such as mass and volume incorrectly. o recording experimental data incorrectly. o having a constant in your experiment.

Given the reaction that occurs in an electrochemical cell: Zn (s) + CuSO4 (aq) ZnSO4 (aq) + Cu (s) During this reaction, the oxidation number of Cu changes from A) 0 to + 2 B) 0 to - 2 C) + 2 to 0 D) - 2 to 0

Oxygen and copper are examples of what? Two substances with identical atoms. Two different molecules. Two different elements. Atoms that can't combine to form compounds.

In this group, which percentage does the green seed represent? 25% 50% 75% 100%

When working on a project, a scientist discovers that some of the data she was basing her research on was not accurate. In this situation, what should the scientist do?

What happens to a neutral atom when an electron leaves

How is the kinetic energy of the particles of a substance affected during a phase change?