Question

Lab 8. Data Sheet: Gram - Mole - Particle Conversion Name: Instructor Date: Time & Day of lecture: Do the setups and write you answer with the correct significant digits in the spaces below. 1. Mass of gold in grams 845 grams a. mass in kg b. number of moles c. number of atoms 2. Mass of silver in grams 54.2 grams a. mass in kg b. number of moles c. number of atoms 298 5 grams 3. Mass of copper in grams a. mass in kg b. mass in lbs c. number of moles d. number of atoms

Answer 1

K 1 mass of geld in grams a) mass in by = . 845 grams 845 Jo.845 ty] U 1000 1. b) no. of moles given mass of gola molar mass of geld * 845 T4.3 moles 197 c) number of atoms me N. Ñ MXNA - N no. of atoms = (no. of moles) (Angadoo no) Na (4.3) (6.022 * 1023) No 25.83 & 10237 grams = sy. 2 grams 54.2, 0.0542 lg im m . 54-2 2 LLILLLLLLLLLLLLLLLLLLL11111 mass of silver in a) mas in kg b) no. of males C ema - 108 In = 0.5 moles . c) number of atoms. n = No .N= n(NA) Na (0.5) (6022 X 1029) IN3:02 Miyade Het H

molar mas 63.5 TITATIITTO 3) mass of copper in grams; 298.5 grams a) mass in hy: 298.5 : 0.298584 rel b) mass in lbs: 0.2985 2.205 = 0.658 lbs c) mo. of moles (n) - Jiven mass - 298.5 -14.7 o no. of atoms = ? - (N) = (no. of moles) (Avogadro no.) No (4.7) 66.022 X 1023) -28-3410237 2.4) mass of sugar (C2 M22 0,1) in grams = 14.87 grans a) mas in dy : 14.87 - 0101487 kg 5) mass in y; 14.87X100 = 1487 9 c) moles of sugar = 14.87 = 0,043 moles 342.3. 3 d) melecules of sugar = (N) = n(NA) 10.043) (6-022 X1043) e) odems of cashen present = 12 of atoms of hydrogen present a 22 g) atoms of oxygen present = 11 100 MILLE ne of carben be (0.26 x 1023 22 X 1023)

D a) mass in fig. Op YS Ray 1. b) no. of moles = 4.3 moles o no. of atoms = 25.43 x 7020 atoms. . 2) a) mass in for a 0.0542 kg by mo. of males'=' ons molestie pins c) no. of atoms - 2.02.X1024 atoms, 3) a) mass inly - 0.2985 kg - b) mass in lbs - 0.658 lbs c) no. of meles - 4.7 moles 1. d) no. of atoms a 20.3x1023 atoms 4) a) mas in Rey ~ 0.01487 kg b) mas in g- 1987 g o moles of sugar 0.943 meles molecules of sugar- 0.2681023 melecules e) atams of c present.. 12 b) atoms of M present a 22 g) atans of o present a "
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