Which type of change can be reversed?

A.) a physical change

B.) a chemical change

C.) a molecular change

D.) an electric change

Find the number of moles of water that can be formed if you have 150mol of hydrogen gas and 70mol of oxygen gas.

How can we predict how the moon will change appearance from day to day?

A student isolated 15.6 g of product from a chemical reaction. She calculated that the reactions should have produced 18.4 g of product. What was the student's percent yield? A - 84.8% B - 15.2% C - 95.4% D - 45.9%

Under what circumstances will a scientific theory be changed or discarded

Which description explains how inertia changes the effects of gravity on objects in the solar system?

Define "Homoglycan" and "Heteroglycan" and give an example of each

If you have 200 grams of iodine how many atoms do you have?

Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The remaining 2% are natural minerals such as iron and sulfur. Consider a 84.7-g sample of sea salt.

Which element in group 15 is the strongest metallic character?

Can neptune sustain life?