What is the definition of thermal expansion

If the ph of a solution is 6.2 what would the poh be

Allicin is the compound responsible for the characteristic smell of Garlic. An analysis of the compound gives the following percent composition by mass; C = 44.4 percent, H = 6.21 percent. S = 39.5 percent, O = 9086 percent.

How many atoms of carbon are in 24 grams of carbon? a) 1.2 x 10²⁴ atoms b) 1.7 x 10²⁶ atoms c) 1.2 x 10²⁵ atoms d) 3.0 x 10²⁴ atoms e) 3.0 x 10²³ atoms Can anyone explain this one?

The smalles part of an element that has all the properties of that element.

If 0.66 g magnesium reacts exactly with 0.43 g oxygen, what mass of magnesium oxide will be produced?

Why do elements within a period of the periodic table have different properties

A professional technician maintains and operates specialized scientific equipment. True False

What is the distance from the highest part of one wave to the highest part of the next wave.

Calculate Delta E when 33.0 g of carbon dioxide sublimes at 77.0 K and 1 ATM

Calculate zeff for a valence electron in an oxygen atom.