Why is hydrogen placed above the alkali metals, on the periodic table?

What is the volume occupied by 3.00 * 1023 molecules of bromine gas at STP? a 404.5 L B. 0.80 L C. 2.2 * 10-2 D. 11.2 L

What happens to the particles of a liquid as it vaporizes

Which property of gases allows you to smell popcorn when you walk into a movie theater?

A change in the identity of a substance where a new substance is formed

Allicin (C6H10OS2) contains 59.9 g of carbon, 21.7 g of hydrogen, 24.4 g of oxygen, and sulfur. What is the mass percent of sulfur in a 162 g sample of the compound?

What does ice cream melt on a hot day which type of thermal energy transfer does this melting represents

For which purpose do biochemists insert human genes into bacteria? to find a cure for the common cold to produce insulin for diabetics to kill resistant strains of bacteria to evolve certain species of bacteria

Cracks in rocks chemical or mechanical

A large boulder falls from an underwater ledge and crashes on the floor of the ocean. A pod of dolphins is 800 meters away. Determine how long it takes for the sound of the crash to reach the dolphins. A) 0.5 sec B) 0.3 sec C) 2.3 sec D) 1.9 sec

Given 4.80g of ammonium carbonate, find: Number of moles of the compound Number of moles of ammonium ions Number of moles of carbonate ions Number of moles of hydrogen atoms Number of hydrogen atoms