The mass number, often listed after the name of the element to identify the isotope, is a total count of the protons and neutrons in the nucleus.Answer and Explanation: NaCl, also referred to as table salt, does not have a mass number. This is because mass numbers only apply to single ...
The formula mass of sodium chloride is equal to the sum of the atomic masses of sodium and chlorine, which can be found on the periodic table. Formula mass NaCl = 22.9898 + 35.4527 = 58.4425 The number of grams in the molar mass (grams per mole) of any ionic compound is the same...
Finally, add together the total mass of each element to get the molar mass of NaClS2: 22.98976928 g/mol + 35.453 g/mol + 64.13 g/mol = 122.57276928 g/mol 5. Find Mole Fraction To find the mole fraction and percentage of each element in NaClS2, divide each total from step 3 by the...
Molar Mass Molar mass is the mass of one mole of a substance. We determine the molar masses from values on the periodic table. Answer and Explanation: Before we can sum all of the molar mass of the elements in acetic acid we need the chemical formula of acetic acid. Acetic acid's chem...
This calculation means that you need one mole of salt. Now, you need to use the molar mass of salt in order to calculate how much you need to weigh out. 1mol(58.44g1mol)=58.44g This calculation means that if you wanted to make a 1 liter solution of 1M NaCl, you would need to ...
mass of water = 147.75 g Example 4: What is the mass percentage of hydrogen in water? First, you need the formula for water, which is H2O. Next, you look up the mass for 1 mole of hydrogen and oxygen (the atomic masses) usinga periodic table. ...
atomicormolecular(Ovs.O2).Usethemolarmassofasubstancetoconvertbetweenthemassofasubstanceandthemolesofasubstance(molarmass=onemole).mass(grams)=#ofmolesxmass(grams)/molesEx:molarmassofNaClis58.5g/moles.Whatisthemassof3.00molesofNaCl?3.00molx58.5g/mol=176gramsPractice—molestomassWhatismassof9.45molesof...
moles of a substance (molar mass = and the moles of a substance (molar mass = one mole). one mole). mass(grams) = # of moles x mass(grams)/moles mass(grams) = # of moles x mass(grams)/moles Ex: molar mass of NaCl is 58.5 g/moles. What Ex: molar mass of NaCl is 58.5 g...
What is the weight in grams of 1 mole of ammonium sulfate (NH4)2SO4? What mass of BaSO4 is present in 40.0 mL of a 0.65 M solution? What is the molar mass of sulfur dioxide? You need to make an aqueous solution of 0.216 M barium iodide for an experiment using a 300 mL volumetric...
so the mass of 3.00 mol NaCl is calculated: o Mass of NaCl = 3 mol x (58.5 g/1 mol) o = 176 g • When you measure 176 g of NaCl on a balance, you are measuring 3.00 moles of NaCl. The Mole-Mass Relationship Practice • What is the mass of 9.45 mol of aluminum oxide (...