Question

1. Find the atomic mass unit of Sulfur-32 with a mass of 3972 and percent abundance 94.99%, Sulfur-33 with a mass of 32.971 and percent abundance 0.75%, Sulfur-34 with a mass of 33.968 and percent abundance 4.25%, and Sulfur-36 with a mass of 35.967 and percent abundance 0.01%.
2. Find the atomic mass unit of Silicon-28, Silicon-29, Silicon-30 with masses of 27.977, 28.976, 29.974, respectively. The percent abundance of the silicon isotopes is 92.2%, 4.7% and 3.1%, respectively.

3. Find the mass ratios and atomic ratios of the following compounds.

4. PCI₃
5. SbF₅
6. BaCl₂
7. BaI₂
8. CCl₄
9. OsO₄

10. Instructions: Write the formula for each of the following ionic compounds.

11. Sodium chloride
12. Potassium chloride
13. Ammonium chloride
14. Sodium hydroxide

Would be very helpful to understand how these formulas break down

Answer 1

Formula fox given ionic compounds; O Sodium Chloride - Nac! - Nacio Potassium chloride - Kata k® cp@ * Ammonium chloxice : N4c: NAO cio Sodium hydroxide = Mach - Name ore * Atomic ratio = Sati hype to the atoms clothes. a) PCI; - 1:3 b)sbFs 1:5 c) Bachy - 1:2 d) Ba In: 1:2 e) CCIV = 1:4 f) Cson: 1:4 * Mass Gatio : a) PC's . mame P = 39.0983 max of C1 = 35.453 Molar man of Palg - (lx 39.0983) + (5x 35. 453) = 216.3633 fox P : 0.1807 7 in 1 18.07.1 (1 = 0.5193 ) and 81.931 b) SbF5 Sb = 121.76 F = 18.998 sofs : (18121.76) + ( 5x 18.998) 121.76 + 95 - 216.76 for sb = 0.5611 - 56.17%. IF 0.4383 - 43.83).

c) Bacl₂ = Ba = 137.327 (1 = 35. 453 Bach, = {1x137. 397) + (2x35.453) = 137.327 + 70.906 - 208. 233 for Ba=0.6595 = 65.95% de 0.3405 = 34.05] 1. d) Ba I Ba I Ba = 137.327 I = 126.904 = (1x 137.327) + (2 X1-26.964) = 137.327 + 253, ECE = 391.135 fer Ba: 0.3511 = 35.111. I=0,6489 : 64.894. e) CCL C= 12.0107 u: 35.453 Cel : (1x12.0107) + (4 .35.453) - 12.0107 +141.212 = 153.8227 FOB C = 0.0781 = 7.818. Ci 0.9219 = 92.19%

f) Oson : Os = 190.23 0 3 15.999 Csą, = (1x 190.23) + ( 4x 15.999) = 190-23 + 64 = 254.23 for Os = 0.7452 : 74.82% 0 -0.2517 : 25.17 4. * Calculating atomic mam unit: → Sem ct (atomic mass x abundance) for all carstiteling isotopes. - (31.972 x 0.9499) = 36.3702 = ( 32.971 x BULL ALBOX 0.0075) - 0.2473 = (33.968 X 0.0425) 1.4436 = (35.967 x 0.0001) = 0.0036 32.0647 auswer is 32.0647 => fos Silicon ; = (21.917 x0.922) (28.916 X 0.047) = (29.974 x 0.031) = qs = - 25.7947 1.3619 0.9292 28.0858