2.0x10^24 atoms of S to moles (3.3)

It is generally considered that dinosaurs live in warm climates, yet fossils remains are found in antartica. How can that be explained

Which of these pairs of elements have the same number of valence electrons? phosphorus (P) and chlorine (Cl) berylium (Be) and calcium (Ca) chlorine (Cl) and helium (He) oxygen (O) and carbon (C)

What are the herbs in the tea bag for?

NaCl + H2SO4 - --> Na2SO4 + HCl Balance the double replacement chemical reaction.

How would the mass of one mole of magnesium atoms compare to the mass of one mole of iron

How many grams of H2O will be produced if 18.1 grams of Fe are produced? Fe3O4 + H2 - Fe + H20 Select one: O a. 7.8 Ob. 75 O c. 17 O d. 1.5

1. Where are the most massive elements found on the periodic table? A at the bottom right B at the top right C at the top left D at the bottom left

Lenny accidentally drops his matchbox car into a graduated cylinder. if the car has a mass of 10 grams and the water level in the cylinder rises from 41 ml to 46 ml. determine the density of the matchbox car. the formula for density is d = m v

When 12.4 grams of KBr are dissolved in enough water to create a 170-gram solution, what is the solution's concentration, expressed as a percent by mass?

The Bohr theory can be extended to non-hydrogen one electron ions such as He + and Li2+, in which case the energy depends on the different atomic numbers Z for the respective atom.