What do we use electromagnet for

Which has more mass a bowling ball or a basketball?

6. A chemist needs 457.8 g of KMnO4 to make a solution. How many moles of KMnO4 is that? 7. How many moles of erythromycin (C37H67N013), a widely used antibiotic, are in 1.00 x 10°g of the substance? 8.

a mug of boiling hot water sits next to a glass of ice water how does the movement of water molecules change in each case?

Victoria is studying the periodic table of elements and notices that several trends exist. Which is following statements could she correctly make regarding elements in the same group in the periodic table? a. They have similar names b.

Two liquids, A and B, have equal masses and equal initial temperatures. Each is heated for the same length of time over identical burners. Afterward, liquid A is hotter than liquid B.

A small 15 kilogram canoe is floating downriver at a speed of 4 m/s. What is the canoe's kinetic energy?

Liquid water is heated until it boils and becomes water gas. Which statement is true about the water?

You are conducting an experiment on plant growth. You take a plant fresh from the soil that weighs 5 kilograms (kg). Then you dry the plant overnight and determine the dry weight to be 1 kg.

What is the ratio of Fe+3 ions to O2 - ions in a neutral compound? a. 1:2 b. 2:1 c. 2:3 d. 3:2

What is the specific heat capacity of a 17.5g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C?