Which of these chemical formulas represents both an element and a molecule?

NaCl

O2

He

SO2

A brick has dimensions of 15 cm x 6.0 cm x 12 cm. what is the volume of the brick in cubic meters?

What has covalent bonds

Balance the oxidation adn reduction half-reactions for the iron (ii) ion and permanganate ion 2 ... how many moles of fe2 + ions can be oxidized by. 067 moles of mno4-ions

Ethyl butyrate, ch3ch2ch2co2ch2ch3, is an artificial fruit flavor commonly used in the food industry for such flavors as orange and pineapple.

What happens to the molarity of bleach when you prepare a solution using 1 gallon of water and 5 table spoons of bleach (sodium hypochlorite) ? Use the terms solution, solvent, solute, moles, grams, and molarity

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s) + N2 (g) → 2Li3N (s) How many moles of lithium are needed to produce 0.60 mol of Li3N when the reaction is carried out in the presence of excess nitrogen?

7. Convert 5.2 cm of magnesium (Mg) ribbon to mm of Mg ribbon.

If you place a crystal substance on a tabletop, return to view it after some time passes, and find it as a powdered substance, which of the following processes most likely took effect? A. Efflorescence B. Distillation

What changes occur in the nuclei of atoms involved in the reactions that fuel nuclear power plants?

Calculate the molar mass for HCN. 0.2703 g/mol 2.703 g/mol 27.03 g/mol 270.3 g/mol