2. A solution is made by measuring 50.0 grams of Na3PO, to make 250.0 mL of solution. What is the molarity of Na^+ ions in the solution 3. How many grams of magnesium ion are in 155.0 grams of Mg3P2?

4. What is the volume of 45.0 grams of N2 gas at stp

5. A photon of light has a wavelength of 6.27nm. What is the energy of this photon?

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.