help no. 22 sampe 28 dengan cara. thx banget yang bantu, semoga sehat, rezeki lancar aamiiin

22. Mg₃(PO₄)₂ (B) ⇒ Jawab
23. C₄H₁₀ (g) + ¹³/₂O₂ (g) ⇒ 4CO₂ (g) + 5H₂O (g)
atau
Reaksi dikali 2 :
2C₄H₁₀ (g) + 13O₂ (g) ⇒ 8CO₂ (g) + 10H₂O (g)
2, 13, 8, dan 10 (B) ⇒ Jawab
24. Avogadro (D) ⇒ Jawab
25. JP CO₂ = n CO₂ x L
6.02 . 10²² = n CO₂ x 6.02 . 10²³
n CO₂ = 0.1 mol

JP NO₂ = n NO₂ x L
1.505 . 10²³ = n NO₂ x 6.02 . 10²³
n NO₂ = 0.25 mol

n CO₂ / v CO₂ = n NO₂ / v NO₂
0.1 / 8 L = 0.25 / v NO₂
v NO₂ = 20 L (E) ⇒ Jawab
26. %O = 100% - 25,93% = 74.07%
N : O = 25.93/14 : 74.04/16 = 1.85 : 4.6275 = 2 : 5
Rumus kimia : N₂O₅ (E) ⇒ Jawab
27. Ar L + 3 x Ar O + 3 x Ar H = 78
Ar L + 3 x 16 + 3 x 1 = 78
Ar L = 27 g/mol (C) ⇒ Jawab
28. n CO(NH₂)₂ = massa CO(NH₂)₂ / MR CO(NH₂)₂
3 = massa CO(NH₂)₂ / 60
massa CO(NH₂)₂ = 180 gram (D) ⇒ Jawab