6. What is the molarity of a solution made from dissolving 3.0 moles of
NaCl in 250 mL of solution?
0.012 M Naci
750 M NaCl
O
3.0 M NaCl
O
12 M NaCI

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

May someone me with these science questions

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver