How many grams of fe (no3) 3 · 9 h2o are required to prepare 350.0 ml of a 0.311 m solution of fe (no3) 3 · 9 h2o?

Concentrated nitric acid (HNO3) contains 70.3% HNO3 by mass. Calculate the volume of concentrated HNO3 needed to prepare 1.15L of 0.100M HNO3 stock solution. (density HNO3 = 1.41 g/cm3)

A hydrate of beryllium nitrate has the following formula: Be (NO3) 2⋅xH2O. The water in a 3.41-g sample of the hydrate was driven off by heating. The remaining sample had a mass of 2.43 g. Find the number of waters of hydration (x) in the hydrate.

How many moles of br2 (l) (mm = 159.80 g/mol) are in 13.9 ml of liquid bromine? the density of br2 (l) is 3.12 g/ml?

From what class (es) of elements is the following compound made? copper || chloride metal and metalloid metal and nonmetal metalloid and nonmetal two metals

How can you tell if a chemical reaction has occurred?

A sample of argon gas, Ar (g). is placed in a 3.80 L container at 320 K. The gas pressure is 0.496 atm. How many moles of Ar gas are in the container?

Review It! All of the following are correct, except: a; A galaxy contains a vast number of stars, their planetary systems, and a variety of other celestial objects. b; Stars orbit the many planets of a galaxy.

Which would be most likely be the pH of a highly-corrosive acid? a) 1 b) 5 c) 8 D) 11

The unit cell of amazonite is made of three pairs of faces, each pair different from the others. The faces are oriented at angles to one another that are not 90 degrees.

An aqueous solution at 25∘C has a hydronium ion concentration of 3.2*10-9 M. What is the hydroxide ion concentration of the solution? Write your answer in scientific notation. Use the multiplication symbol rather than the letter x in your answer.