The mass of 0.985 moles of a hypothetical molecule, XYQ3, is correctly expressed as (where X = 19.61 g/mol, Y= 7.008 g/mol, and Q = 5.58 g/mol)
A. | 42.7 g | |
B. | 43.43 g | |
C. | 1.95 x 10-22 g | |
D. | 7.08 x 1025 g | |
E. | 0.0231 g |
The mass of 0.985 moles of a hypothetical molecule, XYQ3, is correctly expressed as (where X...
10) Consider the hypothetical reaction: 3A2+ 2B C+ 2D If 6.0 moles with 2.0 moles of B, what is the maximum amount of C that can be formed? A) 6.0 mol E) 5.0 mol D) 1.0 mol C) 2.0 mol B) 8.0 mol ues 11) 11) What is the mass of 4.35 moles of aluminum? A) 9.78 x 1022 g B) 2.62 x 1024 C)0.163 g D) 117 g E) 27.8 g g 12) 12) Choose the best classification of...
A hypothetical covalent molecule, X-Y has a A hypothetical covalent molecule, X-Y, has a dipole moment of 1.31 D and a bond length of 105 pm. Calculate the partial charge on a pole of this molecule in terms of e, where e is the charge on an electron. partial charge: X10
10) 10) Consider the hypothetical reaction: 3A2 + 2B - C + 2D Ir 6.0 moles of A are mixed with 2.0 moles of B, what is the maximum amount of C that can be formed? A) 6.0 mol B) 8.0 mol C) 2.0 mol D) 1.0 mol E) 5.0 mol 11) What is the mass of 4.35 moles of aluminum? A) 9.78 x 1022 B) 2.62 x 1024 g C) 0.1638 D) 1178 E) 27.8 g 12) 12) Choose...
What is the mass of 3.119 moles of Ca(OH)2? O 74.10 g O 4.209 x 10-2, O 23.7569 462.2 g 231.1g QUESTION 2 A 3.20-mol sample of aluminum represents how many atoms? o 1.93 x 1024 atoms 5.31 x 10-24 atoms 1.25 x 1023 atoms 5.20 x 1025 atoms QUESTION 3 49.4 g of Cr represents how many atoms? 0.950 atoms atoms 4.27 x 10-21 2.97 x 1025 atoms 5.72 x 1023 atoms
1) 1) To convert a given number of moles into the number of atoms, one would multiply by which of the following factors? A) 1.66 x 10-24 atoms/1 mol B) 1 mol/6.022 x 1023 atoms C) molar mass D) 6.022 x 1023 atoms/1 mol E) 1 mol/1.66 x 10-24 atoms 2) Consider the following precipitation reaction. Which of the following correctly identifies the spectator ions in this reaction? Na2S(aq) + CuSO4(aq) → Na2SO4(aq) + CuS(s) A) Na+ and SO42- B)...
One molecule of a compound weighs 2.93 x 10-22 g. The molar mass of this compound is: 02.06 g/mol 168 g/mol 176 g/mol 567 g/mol Previous Pago Next Page Page 1 of 28
5) How many moles of hydrogen gas are needed to react with oxygen to form one mole of 5) water? 2H2(8) + O268) - 2H20(1) A) 4 mol B) 1 mol C) 2 mol D) 0.5 mol E) 6 mol 6) Incomplete combustion occurs when there is insufficient oxygen to react with a compound. The suffocating gas carbon monoxide is a product of incomplete combustion. How many moles of oxygen gas are required for the complete combustion of 11.0 moles...
One molecule of a compound weighs 2.14e–22 g. Its molar mass is: Select one: a. 121 g / mol b. 129 g / mol c. 2.81 g / mol d. none of these e. 7.76e–3 g / mol
Molar mass (g/mol) 180 30 63.54 #of moles 1.805 x 103 0.4827 0.0284 1. Complete the table below. Substance Mass (g) a. Aspirin tablet (C.H.O.) 0.325 b. Wooden stick 14.482 (CH-0). c. Copper wire (Cu) 1.809 Show work below. a. CqHq Oy =9x12 + 8x1 + 4 x 16 = 180 g/mol b. CH₂O = 12 x 1 + 2x1 + 16x1 = 12 + 2 + 16 =30g/mol 170 g/mol = 0.00 105 males = 1.805.810 moles 14.482 9...
consider the hypothetical reaction. X+2Y yields XY when delta[Y] / delta t =-5.0 x 10 to the -3 1/Ms. what is the rate of formation of XY 3:13 PM Fri Mar 27 4 of 4 11) Consider the hypothetical reaction Xip + 2Y - XY AX -50 10-mol L-sec A What is the rate of formation of XY a 3,0 x 102 mol L sec1 b. 2.5 * 102 mol L sec ! c. 10 x 10 moll see d...