124.0 g of a solution that is 6.85% glucose, C6H12O6, by mass.
2007-01-18 16:18:46 · 5 answers · asked by magicalplaygirl 1 in Science & Mathematics ➔ Chemistry
carbon is 12g/mol Hydrogen is 1g/mol and oxygen in 16g/mol add them all together and you get 180g/mol of glucose then multiply 124.0g by 6.85% and you get 8.494g of glucose in solution. Then you divide 8.494g of glucose by 180g/mol of glucose and you get 0.04719g moles of glucose or 4.719x10^(-2) Tadaa!
2007-01-18 16:26:43 · answer #1 · answered by Anonymous · 0⤊ 1⤋
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2016-05-16 13:01:58 · answer #2 · answered by Anonymous · 0⤊ 0⤋
M = molarity = moles / quantity in liters a) a million.15M = moles x .17 L do the mathematics b) deals with molality it is g solute / kg solvent 0.19 m = 0.027 g / kg solvent kg solvent = 0.027 x 0.19 = 0.0015 kg and moles = g NaCl / molar mass NaCl or a million.5 g / fifty 4.33 g/mole = 0.028 moles 3)50 g answer it is 4% sucrose, hence, you have 2g sucrose moles = mass / molar mass comparable as b
2016-10-31 12:12:25 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Always be mindful of significant digits. Your answer should have only 3 digits not 4.
Numbe rof moles = [124 x (0.0685)]/180 = 0.0472 moles or
4.72 x 10^-2 moles
2007-01-18 17:37:36 · answer #4 · answered by Aldo 5 · 0⤊ 0⤋
a mole of molecules is basically the amount of molecule's in a gram.
For example 1 gram of carbon is 1 mole of carbon
3 grams of iron is 3 moles of iron
2007-01-18 17:16:22 · answer #5 · answered by smartyoshi7 1 · 0⤊ 1⤋