Calculate the molar mass of water (H2O) by adding up the atomic masses of hydrogen (H) and oxygen (O) atoms. Remember to consider the number of atoms in the molecule when calculating the molar mass.

Step 1 of 6 Calculate the molar masses of the given substances. (Enter an unrounded value.) The formula mass of sodium amide, NaNH2, is the following NaNH2 = (1)(average atomic mass of Na) + (1)(average atomic mass of N) + (2)(average atomic mass of H) (1(22.99 amu)+(1)(14.01 amu)+ (2%1.008 amu amu The formula mass of nitrous oxide, N20, is the following. N20-(2)(average atomic mass of N) + (1)(average atomic mass of O) (2)(14.01 amu) (16.00 amu) amu Formula mass in amu equals molar mass in g/mol, so the molar mass of NaNHz is the molar mass of N20 is g/mol and 9/mol Determine t he number of significant figures for a calculation the equation relating the molar mass of a substance to its formula mass, calculate the molar mass of a substance Calculate the molecular mass or formulia mass of a substance Supporting Materials 0 Type here to search oe凹曲

1 of 8 (a) What is the limiting reagent in this reaction? Calculate the molar mass of the given substance. (Enter an unrounded value.) ep The formula mass of magnesium hydroxide, Mg(OH)2, is the following. Mg(oH)2 -()(average atomic mass of Mg)+ (2)(average atomic mass of O) (2)(average atomic mass of H) = (1)(24.31 amu) + (2)(16.00 amu) + (2)(1.008 amu) amu Formula mass in amu equals molar mass in g/mol, so the molar mass of Mg(OH)2 is g/mol. etermine the number of significant figures for a calculation Given the equation relating the molar mass of a substance to its formula mass calculate the molar mass of a substance Calculate the molecular mas or formula mass of a substance Supporting Materials Periodic Table constants and Factors Supplemental Data Additional Materials Section 4 4 O Type here to search oe剖自