How many molecules are in 9.8 grams of calcium

Gases and liquids will both expand to fill their container true or faulse

Ammonia, NH3, is a common ingredient in many household cleaning agents. If you have a cleaning agent containing 2.07 mol NH3, how many grams of NH3 are in the cleaning agent? I don't understand how to set this problem. I know to start with 2.

A sample of 22K gold contains the following: 22 g gold, 1.0 g silver, and 1.0 g copper. What is the percent gold in the sample? Group of answer choices

How can you determine if an unknown substance is a mineral

A toy balloon filled with air has an internal pressure of 126.625 kPa and a volume of 2500 mL. If I take the balloon to the bottom of the ocean where the pressure is 95 atmospheres, what will the new volume of the balloon be in mL?

Why is neon in the same group of the periodic table as helium?

Which of the following presidential candidates was nominated by self-announcement? a. Al Gore b. Woodrow Wilson c. Gerald Ford d. Ross Perot

Particles inside an atom they have a positive charge

Which gas occupies the highest volume at STP?0.02 mol of O20.1 mol of Cl21 mol of N22 mol of H2

Which element can expand its valence shell to accommodate more than eight electrons? which element can expand its valence shell to accommodate more than eight electrons? o he n br?