Aluminum has a density of 2.7g/cm how much space in cm 3 would 100 grams of aluminum occupy?

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?

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

Is 343 in the sequence -5, -2, 1, 4, 7