14.How many moles of water are contained in 0.250 mole of CuSO4 • 5H2O? A)192 g B) 112 g C) 64.0 g D) 48.0 g 15.What is the total mass of oxygen in 1.00 mole of Al2(CrO4)3? A) 1 B) 2 C) 0.1 D)0.2 16.The total number of moles represented by 20 grams of CaCO3 is A)23 g Na B) 24 g C C) 42 g Kr D) 78 g K 17.Which sample contains a mole of atoms?
Mar 25, 2020 · For example, 1 mole of sulphuric acid is made up of 2 moles of the element hydrogen, 1 mole of sulphur and 4 moles of oxygen. To find out the mass of this compound, first find the molar mass of each element that makes up the compound by referring to the periodic table.
Often students are taught to convert between liters and moles conversions by multiplying or dividing by 22.4 L/mol. This video provides information and practice on that approach. Another example: Convert 3.7 moles of a gas to liters.
Molarity of KCl Solution - General Biology - Quiz. "What is the molarity of the solution produced by dissolving 6.00 mol of solute in enough water to make 1.50 L of solution?" A 10.0-mL solution contains 2.40 mmol of solute. What is its molarity?
Apr 25, 2012 · Mass of NaOH/Molar mass of NaOH 0.250 L 4 g / 40 g 0.1 mol = = 0.250 L 0.250 L –1 = 0.4 mol L = 0.4 M Note that molarity of a solution depends upon temperature because volume of a solution is ...
If 2.0 mL of 6.0M HCL is used to make a 500.0-mL aqueous solution, what is the molarity of the dilute solution? What is the freezing point of a solution that contains 0.5 moles of NaI in 500g of water?
What is the molarity of the KOH solution? Answer: 0.0950 M. 2. Answer each of the following ideal gas law questions. a. A gas sample is heated from -20.0 o C to 57.0 o C and the volume is increased from 2.00 L to 4.50 L. If the initial pressure is 0.125 atm, what is the final pressure? Answer: P 2 = 0.072 atm. b.
A mole consists of 6.02 × 10 23 irreducible "pieces" (atoms or molecules) of a substance. Every element's molar mass, or the mass of a single mole in grams is given in the periodic table of elements (see the Resources for an online version). For example, carbon has 12.11 g. This means that one mole (1 mol) of C atoms has a mass of 12.011 g.
Suppose that you need one liter of a solution of 10 mM calcium chloride (10 millimolar, or 0.01 moles per liter), and suppose that you have only CaCl2 dihydrate. To make your 10 mM solution you weigh out 1/100 of the formula weight for dihydrated CaCl2, which is 0.01 x 147.0 = 1.47 grams and bring it to one liter.