Humpty Dumpty weighs 400 Newtons. He falls off a wall 3 m high. How much work was done by gravity on Humpty Dumpty?

You need to make an aqueous solution of 0.216 m manganese (ii) sulfate for an experiment in lab, using a 125 ml volumetric flask. how much solid manganese (ii) sulfate should you add?

Which correct answer is it?

Which atom is likely to form a + 2 ion

Which atoms in the cfc molecule can destroy thousands of ozone molecules in the upper atmosphere?

How many nitrogen and hydrogen atoms are in these two molecules of ammonia? 2NH3 A. 2 nitrogen and 5 hydrogen B. 2 nitrogen and 6 hydrogen C. 6 nitrogen and 6 hydrogen D. 2 nitrogen and 3 hydrogen

The density of aluminum is 2.70g/cm^3. a piece of aluminum foil has a volume of 54.0 cm^3. what is the mass of this piece of aluminum foil?

Describe how the atoms in Calcium Chloride obey the octet rule.

How many milliliters of 2.55M NaOH is needed to make 125mL of 0.75M NaOH solution?

2. What type of bond holds together nitrogen atoms? a. Single Bond b. Double Bond c. Triple Bond d. no bonds hold nitrogen together

Charge on monatomic ions: a) I b) Sr c) K d) N e) S f) In