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1/10 1 1 point How many hydrogen atoms are in a 3.76 g sample of propylene glycol, C,H,O2 (molar mass = 76.10 g/mol)? Give your answer to 3 significant figures and in scientific notation Type your answer. Next 2010 2 1 point A sample of rhenium (molar mass = 186.21 g/mol) contains 6.00 x 1021 atoms. What is the mass of this sample in grams?

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Definition and molecular weight (molar mass) of some common substances. The molecular weight of a substance, also called the molar mass, M, is the mass of 1 mole of that substance, given in M gram.

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Molar mass is the mass (in grams) of one mole of a substance.[3] X Research source Using the atomic mass of an Water's chemical formula is H2O, this means it is composed of 2 Hydrogen atoms and 1 Oxygen atom. To find the molar mass, find the atomic mass of all the components of a chemical.

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Aug 14, 2019 · 2-Methoxyethanol, or methyl cellosolve, is an organic compound with formula C 3H 8O 2 that is used mainly as a solvent. It is a clear, colorless liquid with an ether-like odor. It is in a class of solvents known as glycol ethers which are notable for their ability to dissolve a variety of different

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b) Calculate the mass of propylene glycol (C3H8O2) that must be added to 0.360 kg of water to reduce the vapor pressure by 2.88 torr at 40 ∘C (PH2O at 40 ∘C=55.3torr). 1 Answer Chemistry 7 months ago

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Molar mass of C3H8O2 is 76.09442 g/mol Molar mass of SF4 is 108.0586128 g/mol Molar mass of Na2SO4 is 142.04213856 g/mol Molar mass of formaldehyde is 30.02598 g/mol Molar mass of K2Cr2O7 is 294.1846 g/mol Molar mass of BaSO4 is 233.3896 g/mol Molar mass of N2O4 is 92.011 g/mol Molar mass of K4Fe is 212.2382 g/mol Molar mass of KOH is 56.10564 ... What is the percent mass of carbon (to two significant figures) in C3H8O2? a) 12% b) 23% c) 27% d) 47% e) none of these 14. A compound has the empirical formula CH 2 O and a molar mass of 120.10 g/mol. What is the molecular formula? a) PCl 2 F b) C 3 H 6 O 3 c) C 4 H 8 O 4 d) CH 2 O e) none of these 15. Consider the reaction, P 4 + 6 Cl 2