How many moles is 145 liters of hydrogen gas at STP?

What is the heaviest naturally occurring element on earth

During a redox reaction, the term reduction refers to

If an isotope of an element has 33 neutrons and a mass number of 64, how many electrons must it have?

What is the chemical formula for hydrochloric acid?

A proton is a hydrogen atom without its electron? True False

Move deep below the ocean's surface

The Ka of an acid is 1.3 x 10^-7. Based on the Ka and its relationship with Kw, what is the value of Kb? Use KaKb=Kw 1.3 x 10^-21 7.7 x 10^-15 1.3 x 10^-14 7.7 x 10^-8

A covalent bond is best described as Question 1 options: the sharing of electrons between atoms. the transfer of electrons. a bond between a metal and a nonmetal. a bond between a metal and a polyatomic ion.

From the list below, choose which groups are part of the periodic table

Gypsum is a mineral that is used in the construction industry to make drywall (sheetrock). The chemical formula for this hydrated compound is CaS04 • 2H20. A hydrated compound contains water molecules within its crystalline structure.