Complete the following problems showing all work Report answers to correct sig figs and units. (Hint: you may have to write the formulas first)
1. How many moles are in 212.5 grams of K20?
2. How many atoms are in 0.618 moles of cobalt?
3. How many atoms are in 35.1 grams of iron (II) sulfide?
4. Your friend was asked to determine the mass (in grams) of 4.28 moles of LiBr. Below is their work and answer. Explain why their set up and answer are incorrect.

What is the molarity of 60.0 grams of naoh dissolved in 750 milliliters of water? a) 1.1 m b) 2.0 m c) 12 m d) 75 m

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)

Vi limitens. vastery test select the correct answer. which statement explains why large atoms are more reactive than small atoms? a. large atoms have valence electrons farther from the nucleus and lose them more readily. b. large atoms have greater ionization energy, which they can utilize during a reaction. c. large atoms have a greater number of electrons that they can lose during a reaction. d. large atoms have more energy levels, so they have more energy to pass on in a reaction. reset next