46.068g
46
55
The chemical formula of ethanol is C2H5OH.
The anhydrous copper sulfate (CuSO4) has a molar mass of 159,62.
mass in mg. of ethanol of 5*1020 molecules of ethanol
Because the formula shows that each molecule of ethanol contains 2 atoms of carbon, 6* atoms of hydrogen, and 1 atom of oxygen, the gram molecular mass of one mole of ethanol is the sum of twice the gram atomic mass of carbon, 6 times the gram atomic mass of hydrogen, and the atomic mass of oxygen: 46.07. Therefore, 39.2 grams of ethanol constitutes 39.2/46.07 or 0.851 mole, to the justified number of significant digits. ________________ The subscript 5 immediately after the first appearance of the atomic symbol for hydrogen in the formula, plus the implied subscript 1 of the second appearance of the atomic symbol for hydrogen in the formula.
relative formula mass of MgCO3
The molar mass of ethanol is 46g/mol. Using the formula mass = (molar mass) x (no. of moles), the mass of 0.5623mol of ethanol is approximately 25.9g.
The relative formula mass of a molecule of hydrgoen is two (2 x 1).
55
The chemical formula of ethanol is C2H5OH.
Divide the mass of the ethanol by the sum of the mass of the ethanol + that of the water and multiply by 100. Mass ethanol/(Mass ethanol + mass H2O) (x100)
The chemical formula of potassium dichromate is K2Cr2O7; and the molecular mass is 294,185.
The chemical formula is (NO3)-; the mass is 62 g.
The hydrocarbon ethanol has a chemical formula of CH3CH2OH.
The anhydrous copper sulfate (CuSO4) has a molar mass of 159,62.
(39x2)+12+(16x3)=138
136.1406 g/mol