What does density have to do with our layers?

The density of gold is approximately. 1785 g/L. What is the mass of a sample of helium that occupies 50.0 L of space? Round your answer to the correct number of significant figures. 1.00 g 9.00 g 50.0 g 280. g

How do you determine whether a molecule is polar? select all that apply. select all that apply. determine whether the polar bonds add together to form a net dipole moment. determine if the bonds are ionic or covalent.

A chemist needs to know the mass of a sample of to significant digits. She puts the sample on a digital scale. This is what the scale shows: 0 0 7 6. 2 1 g If this measurement is precise enough for the chemist, round it to significant digits.

Magnesium and oxygen balanced

If 3.45 grams of Mg are burned how many grams of MgO are produced

When forces attracting solvent particles to each other are broken, what is provided for a solution? energy for the solute to precipitate space for the solute in the solvent inertia for the solute to move into the solvent nothing is provided

What occurs when a magnesium atom becomes a magnesium ion?

Two electrons are shared equally in bromine. what type of bond is represented between the bromine atoms in this Lewis structure

6. A gas mixture has partial pressure of 120 torr N2, 350 torr Ar, and 480 torr SF6. What is the mole fraction of sulfur hexafluoride in the mixture?

The population of rabbits in a forest is decreasing. Foxes in that region are now competing with each other for the limited number of rabbits in that forest. Which type of competition exists among these foxes?