What is the mass of a sample of NH3 containing 7.20 x 10^24 molecules of NH3?

161 grams

187 grams

203 grams

214 grams

An example of a negative mutation

How many moles are present in 0.23 kg of SO2

What are the concentrations of hydroxide and hydronium ions in a solution with a pH of 4.6? 1.3 * 10-4 M H3O + and 7.7 * 10-11 M OH - 2.5 * 10-5 M H3O + and 4.0 * 10-10 M OH - 7.9 * 10-6 M H3O + and 1.3 * 10-9 M OH - 8.7 * 10-7 M H3O + and 1.

Why is the Iron symble on the periodic table Fe?

How many valence electrons are in c4h6br2?

10) A screwdriver has the density of 5.5 grams per cubic centimeter. It also has the mass of 2.3 grams. What is the screwdriver's volume?

A chemist weighed out 20.7 g of sodium. Calculate the number of moles of sodium she weighed out

If 1.00 mol of argon is placed in a 0.500-L container at 20.0 ∘C, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation) ? For argon, a=1.

Part 2: Finding Speed and Height Using Energy Directions: Use the KE and GPE equations to solve for speed or height depending on the situation. 1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed? 2.

Why is conductivity be the best test to find a metal, non-metal or metalloid?