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What is the mass of 3.119 moles of Ca(OH)2? O 74.10 g O 4.209 x 10-2,...
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...
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...
1.93 1026 atoms Question 19 (1 point) What is the mass of 12.04 1023 atoms of O? 0 8.0g O 16g 0 32 g O 17 g Onone of these Question 20 (1 point) What is the mass in grams of 557 copper atoms? 1.46 10-23 g of Cu 5.88 10-20 g of Cu 3.54 104 g of Cu 5.28 1024 g of Cu ID 2.13 1028 g of Cu none of these Question 20 (1 point) What is the...
QUESTION 11 22.6 g of Cu represents how many moles? O 0.356 mol 2.81 mol O 1.44 x 103 mol O 1.36 x 1025 mol O none of these QUESTION 12 3.83 g of Ca represents how many moles? O 0.0956 mol O 1.54 x 102 mol O 2.31 x 1024 mol 10.5 mol O none of these Il Proctorio is QUESTION 13
QUESTION 4 For which compound does 0.256 mole weigh 12.8 g? a. CO2 b. CH3CI OCC2H6 d. C2H40 O e none of these QUESTION 5 How many atoms of calcium are present in 83.4 g of calcium? a. 1.25 x 1024 5.3.46 x 10-24 OC 5.02 x 1025 Od. 6.02 x 1023 e. None of these QUESTION 6 Select the set of coefficients from the response list that correctly balances the equation. _N2 + O2 NO a. 3,1,2 b. 1,...
Calculate the number of atoms in each of the following masses: a. 54.0 g of aluminum ogAlx imetat x 6.022 X 10 atoms Al 26.98gAT imotat = 1.21x102t atoms Al b. 69.45 g of lanthanum (La) c. 0.697 g of gallium d. 0.000 000 020 g beryllium 6) Calculate the mass of the following numbers of atoms: a. 6.022 x1024 atoms of tantalum (Ta) 6022 X 1024 atoms Tax imotta X 6.022 x 1023 abousta 180 95g Ta motta =...
Qustion Campleon Status: QUESTION 7 What is the mass of a 4.110-mol sample of sodium hydroxide? Oa. 98.6 g Ob0.1028 g Oc 164,4 g O d.9.732 g Oe. 40.00 g QUESTION 8 A sample of ammonia has a mass of 89.9 g. How many molecules are in this sample? Oa541 x 1025 molecules Ob.5.28 molecules Oc3.18x 1024 molecules Od 1.14 x 1023 molecules x 10-15, molecules QUESTION 9 A mole of a chemical substance represents Oa.6.02 x 1025 chemical particles...
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...
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...
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...