In a chemical reaction reaction the number of molecules of a given substance is indicated by a

An electric current is passed through water. Oxygen gas and hydrogen gas are collected. How does the volume of hydrogen gas compare to the volume of oxygen gas? A: The volumes are equal. B: The volume of oxygen gas is greater.

Which statement is true about elements? They are finite in number. They are infinite in number. They combine to form atoms. They combine to form electrons.

Which has more particles, a mole of copper (Cu) atoms or a mole of neon (Ne) atoms? A. Impossible to determine B. they both are the same C. Copper D. Neon

Empirical formula of magnesium oxide

Give the number of significant figures: 0.01101 cm Significant figures:

Balance this equation- Na3PO4 + KOH - > NaOH + K3PO4

Carbon dioxide, or CO2, is a (n) A.) atom. B.) mixture. C.) element. D.) compound.

If the atomic number of an element is 6 and its mass number is 20, how many neutrons are in the atom's nucleus?

A chemist exploring potential fuels for use in outer space is considering using vaporized aluminum chloride as a fuel.

Dinitrogen monoxide has a structural formula of NNO and requires resonance structures in order to draw the Lewis structures of the molecule.