2 Al2O3 = 4 Al + 3 O2
Moles of Al2O3 = mass / molar mass
= 13.3 / 102
= 0.1304
Moles of Al = 2* moles of Al2O3
= 2* 0.1304
= 0.2608
Number of atoms = moles * avagadro number
= 0.2608 * 6.022*10^23
= 1.57*10^23
If you have any questions please comment
If you satisfied with the solution please rate it thanks
51. How many atoms of aluminum can be produced by the decomposition of 13.3 g of...
49. Calculate the mass of water produced when 625 of methane, CH4, reacts with an excess of oxygen in the following unbalanced reaction. CH4%)+18) + CO2g)+H2Og) a. 7.02 g H20 b. 2.25 x 10² g H20 c. 14.0 g H20 d. 0.347 g H20 c. 0.78 g H20 50. In the reaction below, how many molecules of hydrogen are required to react with 9.79 g of nitrogen? 3H,@) + N2) 2NH3) 1.2.10 x 1023 molecules hydrogen b. 3.16 x 1023...
How many aluminum atoms are there in 98 g of Al2S3? 7.86 x1023 aluminum atoms 0.652 aluminum atoms 5.89 x1025 aluminum atoms 4. 98 x1023 aluminum atoms
How many atoms of neon are in 0.378 g of neon? Select the correct answer below 6.02 x 1023 atoms 1.87 x 10-2 atoms 2,28 x 102 atoms 1.13 x 1022 atoms
-How many aluminum atoms are there in 21.0 g of Al2S3? -When balanced with the smallest set of whole numbers, the coefficient of O2 in the following equation is: __ C3H8 + __ O2 -------------> __ CO2 + __ H2O
212020 CHF CHE 100 1202020 (54AL-302 - 2A1, 02° How many grams of aluminum metal will be needed to produce the required amount of aluminum oxide? (Refer to your answer for line (2), and show all work.) (6) = g aluminum How many grams of oxygen gas will be needed to produce the required amount of aluminum oxide? (Again, refer to your answer for line (2), and show all work.) (7) g oxygen gas How many moles of oxygen gas...
Question 16 (0.5 points) ✓ Saved How many hydrogen atoms are present in 0.829 g of Mg(H2PO4)2.2H2O? molar mass of Mg(H2PO4)2 .2H2O 20 = 254.32 g/mole OA) 8.00 B) 1.57 x 1022 • C) 7.10 X 1022 D) 1.80 x 1025
Name: Chapter 7 Quiz In one experiment you reacted 45.78 of Aluminum with 182.8 g of Iron (III) oxide to produce Aluminum Oxide and Elemental iron (not diatomic). (10 pts each) a) Write and balance the chemical formula, What type of reaction was it? b) Identify the chemical that is being reduced? c) How many mols of Iron(Ill) oxide do you have? d) Which is the limiting reagent? e) How many grams of Aluminum Oxide did you produced? f) What...
6. Find the number of moles of each of the following. a. 6.023 x 1023 atoms of Polonium b. 4.7g of sulfur c. 23.2 g of Aluminum 7. What is the mass of each of the following elements? a. 2.33 mol of Pb b. 0.266 mol of Na c. 0.99 mol of an element with a molar mass of 123 g/mol 8. How many moles of Ag are produced in the decomposition of 1.00kg of silver () oxide? 9. In...
In one experiment you reacted 45.7 g of Aluminum with 182.8 g of Iron (III) oxide to produce Aluminum Oxide and Elemental iron (not diatomic). (10 pts each) a) Write and balance the chemical formula, What type of reaction was it? b) Identify the chemical that is being reduced? c) How many mols of Iron(lll) oxide do you have? d) which is the limiting reagent? e) How many grams of Aluminum Oxide did you produced? f) What would be your...
Part C How many aluminum atoms are in 3.78 g of aluminum? Express your answer in aluminum atoms using scientific notation. ΑΣΦ A1 atoms Submit Request Answer Part D What is the mass of 4.91 x 1021 platinum atoms? Express your answer in grams of platinum. Vo ΑΣΦ Submit Request Answer