The simplest structured unit of a compound is a (n):

a. electron

b. atom

c. proton

d. molecule

Helium in a 100 L container at a pressure of 65.6 atm and temperature of 250 K is transferred to a container with a volume of 250 L and a temperature of 300 K. What is the new pressure?

What pressure is required to reduce 40 ml of a gas at standard conditions to 20 ml at a temperature of 21? c? answer in units of atm?

Solids, liquids, and gases are three common states of matter. Which of these states of matter can flow? A. gases only B. gases and liquids only C. liquids only D. gases, liquids, and solids

How many sublevels are in the second principal energy level for the hydrogen atom?

When solutions of magnesium chloride and potassium phosphate are combined write the formula for the precipitate formed

Which weighs more 10g of iron or 10g of water

Which pair of elements would combine to form an ionic compound? а b sodium and calcium sodium and chlorine carbon and oxygen carbon and sulfur с d

How many moles are there in 545g of Fe2O3?

How are magic minerals different from Felsic minerals? A. Mafic minerals contains lower levels of iron and magnesium. B. Mafic minerals contain more dark-colored, high-density minerals C.

Which of the following gases in Earth's atmosphere would you expect to find as molecules and which as individual atoms? a. Nitrogen b. Oxygen c. Argon