Which has greater mass, 1 mole of iron atoms or 1 mole of lithium

The mass of 1 mole of an element in grams) is the same as which quantity? O A. The atomic mass of the element times Avogadro's number O B. The atomic mass of the element in atomic mass units O c. The atomic number of the element O D.

What method should you use to separate this sample of mixture. A colloid of two liquids

Carbon-14 emits beta radiation and decays with a half-life (t) of 5730 years. Assume that you start with a mass of 6000 g of carbon 14. How many grams of the isotope remains at the end of four half-lives?

Is bleaching your hair a physical or chemical change and why

If 405 mL of 6.0 M HNO^3 is used to make a 3.1 dilution what is the morality of the dilution

1. A window washer does not want to change her position. What does she want the forces acting on her to be? A. small B. large C. balanced D. unbalanced 2. When an object that is moving slows down, which action must be occurring? A. balanced forces B.

Iridium ii phosphate monohydrate

Which of the following does not happen during a chemical change? Mass is gained. New compounds are formed. Old compounds are broken down. Bonds are broken.

A chemist places a 100 g cube of each of the metals listed in the table on a separate hot plate. All of the hot plates are identical. Each hot plate is set on medium heat, and all of the cubes have the same initial temperature.

What types of organisms give the soil essential nutrients for new plants to grow?