26. Why did Mendeleev leave spaces in his periodic

table?

How many moles of water are produced if 5.43 mol PbO2 are consumed

True or False: The dots are placed as far apart as possible because they represent electrons, with the same negative charge, that repel each

A relativistic proton has a momentum of 1.0 * 10-19 kg · m/s and a rest energy of 0.15 nJ. What is the kinetic energy of this proton? (c = 3.00 * 108 m/s, mproton = 1.67 * 10-27 kg)

With respect to energy, which is not necessarily a goal of chemistry? finding ways to store energy finding ways to produce energy finding ways to conserve energy finding ways to use energy

Aluminum bromide reacts with chlorine gas to produce aluminum chloride and liquid bromide, according to the chemical equation below: 2AIBr + 3C1, 2AICI, + 3Br2 How many moles of Aluminum chloride are made if 779 g of chlorine gas are consumed?

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

The density of water is 1.0 g/cm3 will rubbing alcohol float with a density of 0.81 g/cm3

Write an equation that shows the formation of the phosphide ion from a neutral phosphorus atom.