Mass of one water molecule = 6. 1. Ok, you must know that a water molecule has 2(1) + 16 = 18 protons and neutrons. ›› Water molecular weight. Examples: C6H12O6, PO4H2(CH2)12CH3 Calculate molecular mass by: Contact firstname.lastname@example.org if you have any questions about this site 18 grams The mass of one mole of any atom/molecule is equal to its atomic molecular mass in grams. 0 2 3 × 1 0 2 3 water molecules. Use uppercase for the first character in the element and lowercase for the second character. Therefore, it follows that 1000 mL (one liter) of water will contain 1000 g of water molecules. Answer: i) Molecular mass of H 2 = 2 x Atomic mass of H = 2 x 1 = 2 u ii) Molecular mass of O 2 = 2 x Atomic mass of O = 2 x 16 = 32 u iii) Molecular mass of Cl 2 = 2 x Atomic mass of Cl = 2 x 35.5 = 71 u iv) Molecular mass of CO 2 = Atomic mass of C + 2 x Atomic mass of O = 12 + 2 x 16 It will calculate the total mass along with the elemental composition and mass of each element in the compound. Thus, 1 molecule of water = 18 g. No molecules = 18 g. 1molecule = 18 / No . Examples: Fe, Au, Co, Br, C, O, N, F. The density of water is about 1 gram per milliliters (1 g/mL). Enter the molecular formula of the molecule. The molecular formula of water is H_2O The atomic mass of H = 1 The atomic mass of O = 16 In a sense, the formula means H + H + O So... 1 + 1 + 16 = 18 Therefore, the mass of one mole of water = 18 Grams This program determines the molecular mass of a substance. 2. molecular mass of sucrose = 12 . Molecular Mass Calculator. 12 + 22 + 11 . 16 = 144 + 22 + 176 = 342 g How to calculate the mass of a particular isotopic composition. Examples of molecular weight computations: CO2, SO2. Definitions of molecular mass, molecular weight, molar mass and molar weight. The mass of one proton = mass of one neutron = 1.67 * 10^-24 grams, so the mass of 18 n+p = 18*1.67 * 10^-24 grams = 3*10^-23 grams Enter the molecular formula of the substance. Molar mass of H2O = 18.01528 g/mol. Convert grams Water to moles or moles Water to grams. And since the molar mass of water is 18 g per mol (18 g/mol), we can convert the 1000 g of water to moles of water by multiplying 1000 g of water by the ratio (1 mol/18 g). We know that there are two hydrogen atoms and one oxygen atom for every H 2 0 molecule. As we know the molecular formula of water is H2O which means that one molecule of water contain 2 atoms of hydrogen and 1 atom of oxygen. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12) Molecular weight calculation: 1.00794*2 + 15.9994 ›› … To find the mass of 1.00×10 24 (a septillion) molecules of water, first we have to find the mass of one molecule of water (H 2 O). Calculate the mass of one molecule of H 2 ... One mole of water contains 6.