What does a machine change to make work easier? Select three options.

1) the amount of work done

2) the amount of force applied

3) the time needed to do the work

4) the direction of a force

5) the distance over which over a force is applied

Give the oxidation numbers of all atoms in NaMnO4

What are the four methods used to separate mixtures

What is the chemical formula for iron (II) hydroxide?

Which statements correctly describe water boiling in a pot? Air bubbles from the atmosphere are being absorbed. The water's internal kinetic energy is increasing. The water is gaining internal potential energy. The water's temperature is increasing.

When the temperature in a room increases from 25c to 33c what changes from a solid to a liquid

Which of these formulas corresponds to that of a straight-chain alkane A) C5H10 B) C6H12 C) C5H12 D) C7H14

How many nonbonding electron pairs are there in the lewis structure of the peroxide ion, o22-?

How many ions that have a + 1 charge will bond with an ion that has a - 2 charge? one two three four

Convert: 65 kg to mg 65,000 mg O 65,000,000 mg O 65 mg

F. How many representative particles are in 6.78 moles of sucrose C12H22011?