How is it that samples of 63.6g copper metal and 23.0g sodium metal, with different masses, volumes, and densities, both correctly represent 1.00 mol of substance?

Amass of 100.0 g of solute is dissolved in water so that 850. ml of a 0.7500 m solution has been prepared. what is the molar mass of the solute?

If a particle has z = 25 and 23 electrons, what is its charge?

Which words or phrases identify layers of groundwater? check all that apply. water table kettle lake saturation zone underground lake sinkhole will give brainiest, answer quickly.