1 Answer. Chemical compound molar mass The calculator gives compound molar mass according to element atomic mass from the Mendeleev periodic table. The molar mass and molecular weight of Copper(I) Oxide (Cu2O) is 143.091. What is the molar mass of carbon? enable me anticipate that's mole%. Molar Mass, and mols B. What is the mass of 2.000 moles of C? am stands for atomic mass. Ignoring significant figures, calculate the mass of water in the calorimeter. Answer Save. person_outline Timur schedule 2017-12-07 13:18:03 you ought to specify no remember if the % is in mass ore mole%. 12.01 g/mol C. What do you think the mass of 2.000 moles of carbon will be? Na fórmula química, você pode usar: Qualquer elemento químico. Turn off Show hints. x(2*am Cu/2*mm CuO) + y(4*am Cu/2*mm) = 0.88 Cu2O Solve the two equations simultaneously for x and y. x gives you grams CuO. ? 24.02 g D. Drag the jars to the balance. molecular mass = (1 x 14.0067) + (3 x 1.00794) molecular mass = 14.0067 + 3.02382 molecular mass = 17.0305 Note the calculator will give an answer of 17.03052, but the reported answer contains fewer significant figures because there are six significant digits in the atomic mass values used in the calculation. Copper(I) Oxide Cu2O Molar Mass, Molecular Weight. 4 answers Why is the periodic table organized the way it is? This is the principle of chemical equivalence, and you will do many of these calculations … The actual molar mass of your unknown solid is exactly three times larger than the value you determined experimentally. Before you can find the mass, what do you need to know? The molar ratio of Cu in CuO and Cu2O is a million:2 for this reason %Cu in CuO = a million/3 x 88 = 29.33% for this reason %CuO = CuO/Cu x 29.33% in addition the molar ratio of oxygen is a million:a million. The final temperature of the water is 24.2°C. sapling ch 14 question 11? Calculate the energy released as heat when 14.00 g of Cu2O(s) undergo oxidation at constant pressure. • Cu2O + H2SO4 = Cu2SO4 + H2O • 2 CuI + K2CO3 = 2 KI + Cu2O + CO2 • Molecular mass H 2 O = (2 x atomic mass of H) + atomic mass of O = 2(1.008 amu) + 16.00 amu = 18.02 amu • So, one mole of water (6.022 x 10 23 molecules) has a mass of 18.02 g. • Molar mass of NaCl = atomic mass of Na (22.99 amu) + mol) is heated to 82.4°C and dropped into a calorimeter containing water (specific heat capacity of water is 4.18 J/g°C) initially at 22.3°C. We work out the molar quantity.....and get 6.022xx10^22 "copper atoms"..... From your Periodic Table we learn that one mole of copper, 6.022xx10^23 individual copper atoms have a mass of 63.55*g. And thus we use the MASS of a chemical sample to calculate the NUMBER of atoms and molecules. 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