Molarity
Calculate the molarity of a solution prepared by dissolving 4.00 g of sodium hydroxide in a total volume of 100.00 mL.
1.0 M
Write the formula for the ionic compound formed from Al and Cl.
AlCl3
Determine whether or not the following chemical equation is balanced: Fe(OH)3 + 2HNO3 ---> Fe(NO3)3 + 2H2O.
The reaction is not balanced.
Tungsten wire is the filament inside most old-style incandescent light bulbs. In a typical light bulb, the tungsten filament weighs 0.635 g. How many atoms of tungsten are in such a light bulb filament?
2.08 x 1021 atoms
Calculate the molarity of a solution prepared by dissolving 16.00 g calcium chloride in a total volume of 250.0 mL.
0.577 M
Write the formula for the compound made from Ca2+ and PO43-
Ca3(PO4)2
Determine whether or not the following reaction is balanced: BaCl2 + H2SO4 ---> BaSO4 + 2HCl.
The reaction is balanced.
Styrene has an empirical formula of CH. Its molecular mass is 104. What is its molecular formula?
C8H8
How many mL of 0.615 M HNO3 contains 1.67 g HNO3?
43.1 mL
What is the formula for cobalt (III) fluoride?
CoF3
Balance the following chemical reaction in a basic environment: Cr2O72- + Fe2+ ---> Cr3+ + Fe3+.
Cr2O72- + 7H2O + 6Fe2+ ---> 2Cr3+ + 14OH- + 6Fe3+
A sample of a liquid with a mass of 8.657 g was decomposed into its elements and gave 5.217 g of carbon, 0.9620 g of hydrogen, and 2.478 g of oxygen. What is the percentage composition of this compound?
C: 60.26%
H: 11.11%
O: 28.62%
Calculate the number of grams of solute (NaCl) needed to make 125 mL of 0.200 M NaCl.
1.46 g
What is the name of Mg(ClO4)2?
Magnesium perchlorate
Balance the following equation for a reaction occurring in an acidic solution: S2O32- + OCl- ---> Cl- + S4O62-.
2S2O32- + 2H+ + OCl- ---> S4O62- + Cl- + H2O
Calcium phosphate is widely found in nature in the form of natural minerals. It is also found in bones and some kidney stones. In one case a sample is found to contain 0.864 moles of phosphorus. How many moles of Ca3(PO4)2 are in that sample?
0.4320 moles