What is the formula weight (in g/mol) of copper(II) nitrate trihydrate, Cu(NO3)2 3H₂O? Give your answer to 6 significant figures, and be sure to use at least 4 significant figures for each atomic weight. 241.60 g/mol What is the percentage of copper (by mass) in copper(II) nitrate trihydrate, Cu(NO3)2 3H₂O? Give your answer to 5 significant figures. %Cu by mass

1.) What is the molar mass for aluminum sulfate? Please use the atomic masses on the periodic table. Express your answer with the correct significant figures and units for molar mass. Mass Choices:  123.05 342.17 6.02 x 10^23 273.08 Unit Choices:  mol mol/g g g/mol 2.) How many grams are there in 5.699 moles of copper, Cu?  Express your answer with the appropriate significant figures and units.  0.08968 g/mol Cu 362.2 g/mol Cu 362.2 g Cu 0.08968 g Cu

Calculate the amount of anions (in moles) in 24.4 g of calcium iodate. Express your answer with three significant figures.

What is the formula (solve for x) for the original hydrated sample of copper (II) sulphate? You weigh a sample of CuSO4 · XH2O. After you heat the sample, you find that the mass of the anhydrous salt is 1.47g. What is the value of x? CONTEXT Mass of just anhydrous compound = mass of anhydrous compound rod mass of beaker and 108.34g - 106.87g = 1.47g %3D %3D = original compound mass - anhydrous compound mass = 3.00g - 1.47g = 1.53g Mass of just water

3cucl, (aq) + 2Fe(s) 2Fecl,(aq) • + 3Cu(s) If you had a solution of copper(II) chloride that contained 33.1 g of CuCl, and then added 11.15 g of iron, how much solid copper would you get (assume 10% yield)?

What is the volume (in mL) of isopropanol that contains 7.23 × 1022 molecules of isopropanol? The density of isopropanol is 0.786 g/mL and its molar mass is 60.10 g/mol.

The formula for alum is KAl(SO4)2  x 12 H2O. All of the atoms in this formula contribute to the molar mass. When you add up all the masses in the formula, the molar mass is 474.39 grams/mole. The molar mass of aluminum is 26.98.   If you started this experiment with 1.063 grams of aluminum foil, what is the theoretical yield      of  Alum? Give your answer to 1 decimal place.  __________________________   The actual yield of alum in the lab was 17.8 grams. What percentage yield is this? Give your       answer to 1 decimal place.  ____________________________

Calculate the mass in grams of 1.35 x 104 molecules of methanol. The chemical formula for methanol is CH, O. mass:

37) Using the balanced chemical equation below, what is the mass of silver metal produced from 8.36 g of copper?             Cu(s) + 2AgNO3(aq) → Cu(NO3)2(aq) + 2Ag(s) A) 0.187 g B) 38.54 g C) 2.747 g D) 1.08 g E) 28.38 g

2. A mixture of Na2SO4 and its hydrate Na2SO4-10H₂O has a mass of 1.5099 g. After heating to drive off all the water, the mass is only 1.1410 g. What is the weight percentage of Na2SO4.10H₂O in the original mixture? Report your answer to 4 significant figures. Molar masses: Na2SO4 142.04 g/mol; Na2SO4.10H₂O 322.19 g/mol.