A birthday balloon had a volume of 14.1 L when the gas inside was at a temperature of 13.9c. Assuming no gas escapes, what is the volume when the balloon warms up to 20.0c?

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

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?

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's