You then use this in a ratio as below to do the problem. For 1, you must convert 8.5 g to mol of CuBr2*4H2O. Calculate the molar mass for Mn3O4, an oxide of manganese. Molar mass of NaCl is 58.443, how many grams is 5 mole NaCl? The molar mass of CuBr2 is 223.35 g/mol 192.31 g/mol 272.21 g/mol And using the periodic table to find the molar masses of copper and bromide, we can determine that the molar mass of CuBr2 is: 63.55 + 2*79.90 = 233.35 g/mol. The percentage composition of copper (Cu) in CuBr2 means what percent of the total mass of a molecule of CuBr2 is copper? Exact Mass: 222.76422 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) Monoisotopic Mass: 220.76627 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) Topological Polar Surface Area: 0 Ų: Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18) Heavy Atom Count: 3: Computed by PubChem: Formal Charge: 0: … What Mass Of CuBr2 Is Needed To Prepare 750.0 ML Of A 1.25 M Solution? The mass and molarity of chemical compounds can be calculated based on the molar mass of the compound. Copper(II) bromide is used as a wood preservative. 1. 4. Then, using dimensional analysis, divide the grams of copper (45.5) by the molar mass (before significant figures) to get the total moles: It is also used in the copper vapor laser, a class of laser where the medium is copper bromide vapour formed in-situ from hydrogen bromide reacting with the copper discharge tube. The molar mass of BeBr, is 168.81 g/mol 3. See the answer. Copper(II) bromide (Cu Br 2) is a chemical compound.It is used in photographic processing as an intensifier and as a brominating agent in organic synthesis.. therefore the number of moles of CuBr2 equal the number of moles of Cu ions . The molar mass of CaBr2 is . What mass of CuBr2 is needed to prepare 750.0 mL of a 1.25 M solution? Express your answer to five significant figures. The molar mass of BeBr2 is . Copper(II) Bromide Tetrahydrate CuBr2.4H2O Molar Mass, Molecular Weight grams = 58.443 × 5 = 292.215 (g) The mass (in grams) of a compound is equal to its molarity (in moles) multiply its molar mass: grams = mole × molar mass. you have 3.00 grams of CuBr2 with the molar mass of 223.35. by dividing them you get the moles of CuBr2 available. Molar mass of CuBr2*4H2O is 295.4151 g/mol Convert between CuBr2*4H2O weight and moles The molar mass of CuBr2 is . each mole of CuBr2 has 1 mole of Cu ions. You do this by finding the molar mass of CuBr2*4H2O, which you do my finding the total molar mass of water and adding it to the molar mass of CuBr2. a. 2. Copper(II) bromide is used as a wood preservative. Qining Jin 1F Posts: 53 Joined: Fri Sep 29, 2017 2:07 pm. The following questions all refer to a 2.38×10-1 M solution of CuBr2: What volume of solution contains 3.79×10-1 moles of Br− ion? 3. The molar mass of CdBr2 is . How many Cu2+ ions are in 1.86×102 mL of solution? 4 significant figures - 233.4 g/mol. 209 g c. 372 g d. 938 g e. > 1 kg This problem has been solved! 1) 8.5 g CuBr2*4H2O * (1 mol CuBr2*4H2O/295.37 g CuBr2*4H2O) = 0.029 mol CuBr2*4H2O The molar mass of CdBra is 143.45 g/mol 199.88 g/mol 4. What mass of CuBr2 is needed to prepare 750.0 mL of a 1.25 M solution? Top. To solve this: 1) Find the total mass of one molecule of CuBr2 from the molar masses of Cu(63.5g/mol) and Br(80g/mol): 1xCu = 1x(63.5g) = 63.5g 2xBr = 2x(80g) = 160g Total mass CuBr2 = 63.5g + 160g = 223.5g help with any of the above would be greatly appreciated! What volume of solution contains 7.93×101 g of Br−? Part C. Calculate the molar mass of acetylcholine (C7NH16O2), a neurotransmitter that activates muscles. Expert Answer 100% (38 ratings) Previous question Next question 134 g b. Part B. E.g. What mass of CuBr2 is dissolved in 4.86×102 mL of solution? 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