Q 3.
Answer 1.2224 gram oxygen
Q4.
Answer :
For Nitrogen 11.11 %
For Hydrogen 3.1746 %
For Chromium 41.2698 %
For Oxygen 44.44 %
Details answer given in the attachment...
(3) 3. How many grams of oxygen are present in a sample containing 5.75 x 1021...
(3) 3. How many grams of oxygen are present in a sample containing 5.75 x 1021 formula units of manganese (II) phosphate ? (6) 4. Determine the percent composition (by mass) for each element in ammonium dichromate, (NH4)2Cr207.
1. How many GRAMS of ammonium phosphate, (NH4)3PO4, are present in 2.81×1022 formula units of this compound?
1. How many GRAMS of manganese(II) nitrate are present in 1.37×1022formula units of this compound? grams 2. How many formula units of manganese(II) nitrate are present in 9.90 grams of this compound? formula units
4. How many atoms are present in 0.180 grams of gallium. Answer #4 5. Write the correct formula for each of the following compounds: a. Carbonic acid b. Nickel (II) dichromate c. Magnesium phosphate d. Dinitrogen hexafluoride TIME: QUIZ GRADE
3.2a a sample of propanol, C3H8O, contains 1.96 mol of the compound. Determine the amount (in mol) of each element present and the number of atoms of each element present in the sample. Moles, Atoms C H O 3.2b Determine the percent composition of each element in manganese(II) phosphate, Mn3(PO4)2. %Mn, %P, %O 3.2c A compound is found to contain B, H, and Cl with the following percent composition: B: 55.39% H: 8.280% Cl: 36.33% What is the empirical...
3. Acrylic acid, used in the manufacture of some plastics, has the composition 50.0% C, 5.6% H, and 44.4% O by mass. What is the empirical formula? 4. Urea contains C, H, N, and O. A 2.54 gram sample of urea is found to contain 0.51 g carbon, 0.17 g of hydrogen, and 1.19 g of nitrogen. What is the empirical formula of urea? 5. Putrescine, a substance produced by decaying animals, is composed of 54.5 % carbon, 13.6% hydrogen,...
7. Solid sodium oxide is synthesized from it elements in a reaction that is 45.6% efficient. How many grams of sulfur must be used in the reaction in order to produce 350.0 g of the product? 8. A 78.91 g sample of ethane, C,H, is completely oxidized in a reaction with 94.21 g of oxygen. What mass of products (in grams) are produced in the reaction? 9. 5.43 x 1023 formula units of sodium phosphate are reacted with 8.32 x...
6.0 grams hydrocarbon sample were made to react with oxygen gas to produce 17.6 grams of carbon dioxide according to the equation: CxHy(g) + O2(g) ---------- CO2(g) + H20(l) where x = subscript for C, y = subscript for H a. How many grams of C are there in 17.6 grams of CO2? b. How many grams of C are there in the hydrocarbon sample? c. How many moles of C are there in the hydrocarbon sample? d. How many...
3. Consider 1.00 mole of hydrogen gas, H2. How many dihydrogen molecules are present? How many hydrogen atoms are present? What is the mass of this sample? 4. Ethanol has a molecular formula of CH3CH2OH. a. What is the average mass of one molecule of ethanol? b. What is the mass of 1.000 moles of ethanol? c. What is the mass of 0.5623 moles of ethanol, CH3CH2OH? d. How many moles of are present in a 100.0 g sample of...
1. How many GRAMS of nitrogen are present in 1.55 moles of dinitrogen tetrafluoride, N2F4? _______grams 2. How many MOLES of fluorine are present in 1.08 grams of dinitrogen tetrafluoride? _________moles 3.The percent by mass of copper(I) in Cu2SO3 is __________%. 4. Calculate the percentage composition for SF4. Mass percentage of sulfur = _________% Mass percentage of fluorine = _________%