What is the molar mass of the anhydrous

compound? Answer using four significant figures.

36.02 g/mol

120.15 g/mol

156.12 g/mol

What mostly determines the chemical properties of the atom of an element

Which of the following food proteins has the best assortment of essential amino acids for the human body?

11. What is the shape of the s orbital?

Give 4 Economics activities associated with water

In one experiment, magnesium metal melts. In a second experiment, magnesium metal ignites as it combines with oxygen. Classify the change in each experiment as chemical or physical. Explain your reasoning.

What is meant by "pressure of the atmosphere?" What causes this pressure?

A substance is analyzed and found to contain 85.7% carbon and 14.3% hydrogen by weight. A gaseous sample of the substance is found to have a density of 1.87 g/L, and 1 mol of it occupies a volume of 22.4 L.

Which property of a mineral sample does not influence how quickly it settles in water? 1) density 2) hardness 3) shape 4) size

Dinitrogen difluoride gas is collected at in an evacuated flask with a measured volume of. When all the gas has been collected, the pressure in the flask is measured to be.

How is the mass number of an isotope expressed in the name of an atom?