# Calculate mass percent composition of sulfur in al2(so4)3

In 1 molecule Al2(SO4)3 we have 2 Aluminium atom, 3 Sulfur atoms and 12 oxygen atoms Mass % sulfur = (3*atomic mass of S/ molar mass of Al2(SO4)3) * 100 % Mass % sulfur = (3*32.065 / 342.155) * 100% How to calculate relative molecular mass = How to calculate relative formula mass. Molecular/formula mass = total of all the atomic masses of ALL the atoms in the molecule/compound. Watch out for brackets e.g. (OH) 2 means two OH groups to add up! Relative molecular mass/formula mass calculation Example 2.1

Percent Composition One can find the percentage of the mass of a compound that comes from each of the elements in the compound ... • 3 sulfur atoms • 4 sulfur atoms • 6.0 x 1023 sulfur atoms • 1.8 x 1024 sulfur atoms . Stoichiometry If you have equal masses of the following metals,Calculate the molecular mass of the CuSO4 . 5H2O 2 See answers Advertisement Advertisement abhi178 abhi178 Atomic mass of H = 1 g atomic mass of O = 16 g atomic mass of Cu =63.5 g atomic mass of S = 32 g now ,Consider a chemical equation , N 2 + 3H 2 = 2NH 3. Find the mole ratio of N 2 H 2 if it has the combustion of 1.8g of N and 3.2 g of H 2? Molar Mass of the N = 14.0067 Hence Molar mass of N2 = 14.0067 x 2 = 28.013 Molar Mass of H = 1.008 Hence Molar mass of H2 = 1.008 x 2 = 2.016 Substituting the values in the formula, = [ ( 3.2 / 2.016 ) / ( 1 ...

3) 4) 3)The percent composition by mass of nitrogen in NH4 OH (gram-formula mass = 35 grams/mole) is equal to 1) 17.5% 2)35.0% ... What is the ratio by mass of sulfur to oxygen in SO2? 1) 11% 2) 22% 3)45% 4) 64% 12)The percent by mass of oxygen in Na2SO4 (formula mass = 142) is closest toMolecules of water = 0.0556 x 6 x 1023 = 3.34 x 1022. 5.Percentage Composition in a Compound: 1. Calculating % Composition (from masses of each element) Divide the mass of each element by the total mass of the compound and multiply by 100. 2. Calculating % Composition (from formula) Calculate formula massAnswer (1 of 5): First, take out your periodic table. In Al_2(SO_4)_3, there are three elements: Al, S, O * 2 atoms of aluminium * 1x3=3 atoms of sulphur * 4x3=12 atoms of oxygen We need the relative atomic mass of each element. Can you see some decimal numbers below each element? That's it...

Solution: We know the atomic mass of calcium is 40. Formula to calculate number of moles = weight/atomic mass of the element. = 80/40. = 2. Hence, number of moles in calcium is 2. In our below online number of moles calculator, enter the weight and select the element from the drop-down menu. Finally, click on calculate button to get the result.

Example 2. Computing Formula Mass for an Ionic Compound Aluminum sulfate, Al 2 (SO 4) 3, is an ionic compound that is used in the manufacture of paper and in various water purification processes.What is the formula mass (amu) of this compound? Solution The formula for this compound indicates it contains Al 3+ and SO 4 2− ions combined in a 2:3 ratio. For purposes of computing a formula mass ...Assume a 100.0 g sample. From the percent composition data, a 100.0 g sample contains 14.25 g C, 56.93 g O, and 28.83 g Mg. 1 mol C 14.25 g C x = 1.19 mol C 12.0 g C 1 mol O 56.93 g O x = 3.56 mol O 16.0 g O 1 mol Mg 28.83 g Mg x = 1.19 mol Mg 24.3 g Mg Mg1.19C1.19O3.56; divide each subscript by the smallest, 1.19.

Download Stoichiometry and Process Calculations (1)...The aluminum sulfate hydrate [Al2(SO4)3 x XH20] constains 8.20 percent of Al by mass. Calculate X, that is the number of water molecules associated with each Al2(SO4)3 unit. Please any suggestions will help. Thank you. matrix answered on 09/28/03: Atomic weight of Al is 26.98 In your compound you have 2 Al atoms. 26.98 x 2 = 53.96

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Aluminum metal reacts with sulfuric acid according to the following equation: 2Al (s) + 3H2SO4 (aq) → Al2 (SO4)3 (s) + 3H2 (g) If 12.9 g of aluminum reacts with excess sulfuric acid, and 62.4 g of Al2 (SO4)3 are collected, what is the percent yield of Al2 (SO4)3? asked Sep 1, 2019 in Chemistry by Leslie.

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Mass percent can also be used to calculate the mass of a particular element in any mass of a compound. 3-26. Sample Problem 3.7. Calculating the Mass of an Element in a Compound. PLAN: PROBLEM: Use the information from Sample Problem 3.6 to determine the mass (g) of carbon in 16.55 g of glucose.