If the temperature changes in a chemical reaction, what has occured? a)energy was destroyed b)energy was created c)there was no energy transfer d)energy was transferred

What is impossible to do with a hypothesis

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

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?