10. What is the total number of atoms contained in 2.11 moles of nickel? A. 2.85...
m105%20Makeup%20Exam%20(2).pdf 31) 31) 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/I mol B) 1 mol/6.022 1023 atoms C) molar mass D) 6.022 * 1023 atoms/1 mol E) 1 mol/1.66 x 10-24 atoms 3 2) 32) How many atoms of sulfur are present in a 155 g sample of sulfur? [Molar mass: S 32.06 g/mol) A) 6.02 x 1023 atoms B) 2.91 x...
31). 31) 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 32) 32) How many atoms of sulfur are present in a 155 g sample of sulfur? [Molar mass: S, 32.06 g/mol] A) 6.02 x 1023 atoms B) 2.91 x 1023...
I was wondering if someone could help me with some problems on my test, my teacher allows me to correct them then give them back for 1/2 credit. Along with the correct answer for each id like to know why the answers are wrong and why the new answer is correct. The questiins with a red mark are incorrect. QUINN A coolant widely used in automobile engines is 38.7 % carbon, 9.7 % hydrogen, and 51.6 % oxygen. Calculate the...
- 30 The total number of C atoms in 3.0 mole of C4Hy is (A) 7. 2264 x 1024 atoms (B) 1.9927 x 1023 atoms (C) 8. 0293 x 1023 atoms (D) 4.5165 x 1023 atoms C-12 H- 3.0m
what is the predicted product from the following combination reaction? E) none of the above 33) Which of the following produces the characteristic color of a fireworks display? A) atoms exploding B) molecules exploding C) electrons dropping to lower energy levels D) nuclei dropping to lower energy levels E) none of the above Chapter 8 34) How many atoms of cobalt equal a mass of 58.93 g? (Refer to the Periodic Table.) A) 1 B) 27 C) 58.93 D) 59...
3) Calculate the percentage by mass of hydrogen in PtCl2(NH3)2 A) 0.672 B) 2.016 C) 1.008 D) 0.034 E) 1.558 4) How many molecules of CH4 are in 48.2 g of this compound? A) 1.81 x 1024 B) 4.00 C) 2.00 x 1023 D) 4.64 x 1026 E) 5.00 x 10-24 5) A sample of CH2F2 with a mass of 19 g contains A) 9.5 B) 3.3 * 1024 C) 2.2 x 1023 atoms of F. D) 4.4 x 1023...
moles of C. 6) 0.400 mole of sucrose, C12H22011. contains A) 12 B) 6.02 x 1023 C) 5.02 x 1022 D) 2.89 x 1024 E) 4.80 7) How many moles of carbon atoms are there in 0.500 mole of C2H6? A) 0.500 mole B) 1.00 mole C) 3.00 moles D) 6.02 x 1023 moles E) 4.00 moles 8) Calculate the molar mass of magnesium chloride, Mg (12. A) 24.31 g/mole B) 95.21 g/mole C) 125.9 g/mole D) 59.76 g/mole E)...
12. Calculate the number of moles containing each of the following (a) 1.00 x 1022 atoms of cobalt, Co (b) 2.00 x 1023 molecules of carbon dioxide, CO2 (c) 3.00 x 1024 formula units of cobalt(II) carbonate, COCO,
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)...
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