(PLEASE HELP, i will give brainlist, and the question is 15 points) What is the volume of a 4.25 liter of Neon at STP whose pressure is now 50 kPa
1) 2.52 L
2) 16.78 L
3) 8.6 L

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?

Chemistry worksheet - i am not sure what they are asking for exactly?

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?