What is the molecular mass of CH4 and H2O?
(i) Molecular mass of H2O = 2 (1.008 amu) + 16.00 amu = 18.016 amu. … (iii) Molecular mass of CH4 = 12.01 amu + 4 (l. 008 amu) = 16.042 amu.
What is the number of molecules in 8g CH4?
Here is the calculation: n = 8.0 gr / 16.043 gr/mol = 0.499 mol. Number of molecules = 0.499 mol * (6.022 * 10^23 1/mol) = 3.005 * 10^23 molecules.
How many moles are in 120 grams of CH4?
3) A compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole. A compound with an empirical formula of C2H8N and a molar mass of 46 grams per mole.
How many molecules are in 16 grams of CH4?
16g methane (CH4) represent 1 mole and has 6.02×1023 molecules of methane.
How do you find the mass of methane?
Methane/Molar mass
We’ll use methane, CH4, as an example. The formula weight of methane is [12.01 + (4 x 1.008)] = 16.04. In terms of mass, methane is (4.032/16.04) x 100 = 25.13% hydrogen and (12.01/16.04) x 100 = 74.87% carbon. N.B. In this example the numerical values of the atomic masses are given to 4 significant figures.
What is mass of 0.5 mole of CH4 in amu?
CH4. Molar mass: Atomic mass of C + Atomic mass of H. = 1×12+4×1. = 16u = 16g.
How many molecules are in 21.6 grams CH4?
(1×28,09)+( 2x 16.00) = 60.09 How many molecules are there in 21.6 grams of CH4? 23 2160, Imole x 6.02 x = 8.
