4. The percent by mass of silicon in the compound, Six,, is 72.33 %, what is...
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11. What is the empirical formula of a compound that is by mass 50% element A (whose molar mass is 38) and 50% element B (whose molar mass is 19)? A) A,B B) AB, C) AB D) A,B2 12. What would be the volume of 76 g of fluorine gas (molar mass equal to 38 g/mole) at a pressure of 0.821 atm and a temperature of 27°c? R = 0.082 L.atm/molek A) 30 L B) 60 L C)...
Complete the table below for calculating the molar mass of the compound phosphorus pentachloride. Molar mass of element Moles Mass in one mole of phosphorus pentachloride P D g /mol mol - g/mol mol Molar mass phosphorus pentachloride - g/mol
Complete the table below for calculating the molar mass of the compound sulfur trioxide. Molar mass of element M ass in one mole of sulfur trioxide g/mol * * Moles mol mol g/mol Molar mass sulfur trioxide = g/mol
10. A compound has the following percent composition by mass: C: 40.92%; H: 4.58%: O: 54.50%. Calculate the molecular formula if Its molar mass is 216 g/mole.
compound is found to contain 63.65 % nitrogen and 36.35 % oxygen by mass. the empirical formula is? the molar mass is 44.02 g/mol. what is the molecular formula? A compound is found to contain 6.360 % silicon , 36.18 % bromine , and 57.46 % iodine by mass. the empirical formula is? the molar mass is 441.7. what is the molecular formula? A compound is found to contain 64.80 % carbon , 13.62 % hydrogen , and 21.58 %...
A compound contains 0.24 g C and 0.050 g H. The molar mass of the compound is 58 g/mole. What are the empirical and molecular formulas of the compound?
A chloride of silicon contains 79.1 mass % Cl. (a) What is the empirical formula of the chloride? (b) If the molar mass is 269 g/mol, what is the molecular formula?
2. (3 points) A chloride of silicon contains 79.1 mass % Cl. A) What is the empirical formula of the chloride? B) If the molar mass is 269 g/mol, what is the molecular formula?
onent of protein called threonine has an approximate molar mass of 120 g/mole. If the percent sition is as follows, find the empirical and molecular formulas of threonine? C = 40.33%, H = 7.616%, O = 40.29% and N = 11.76% aethyllead, the "lead" additive in leaded gasoline, has a percent composition by mass of 64.06% Pb, 29.71 % C and 6.23% H. What is the empirical formula of tetraethyllead? A 50.51 g sample of a compound made from iron...
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7. What is the molar mass, in grams, of a compound whose chemical formula has three calcium atoms, two phosphorus atoms, and eight oxygen atoms? Show work to get credit. No work, no credit. 8. Calculate the number of moles in 28.65 grams of the compound in question 7. Hint: you calculated the molar mass of the compound in question 7. Show work to get credit. No work, no credit. 9. Calculate...