7. How many moles are in 5 x 10 2 atoms of gold?

On a mission to a newly discovered planet, an astronaut finds copper abundances of 69.97 % for 63Cu and 31.03 % for 65Cu. What is the atomic mass of copper for this location? The mass of 63Cu is 62.9300 amu. The mass of 65Cu is 64.9200 amu.

How do scientists use radioactive decay to date fossils and artifacts

What mineral is this? Fist-sized irregularly shaped piece. Salmon-pink color with nonmetallic luster. Two cleavage planes at 90 degrees to each other. Has a hardness of 6. Very abundant mineral.

The pressure in a car tire is 298 kilopascals at 300 Kelvin. After a long drive, the pressure becomes 325 kilopascals. Which law will you use to calculate the new temperature in the tire assuming that the volume is constant?

Select all that apply. Which of the following are interactions between particles in a liquid? ionic bonds covalent bonds van der Waals forces metallic bonds hydrogen bonds

What is meant by solvation? A. nonpolar solute surrounded by polar solvent B. polar solute surrounded by nonpolar solvent C. ionic solute surrounded by nonpolar solvent D. ionic solute surrounded by polar solvent

7. Convert 158 g of C to moles.

How does molecular size affect solubility

Is mass conserved when 200 g of water undergoes a physical change? Use complete sentences to support your answer by explaining how this can be demonstrated.

For wach of the following cases, state whether the density of the object increases, decreases, or remains the same: (a) A sample of chlorine gas is compressed (b) A lead weight is carried up a high mountain. (c) A sample of water is frozen.