Soal A

Sebanyak 12 gr senyawa organik di bakar menghasilkan 17,6 gr gas karbon dioksida dan 7,2 gr uap air. Jika diketahui Ar : H=1, O=16, C=12 dan massa 1 molekul senyawa = 1 x 10-22 gr (L=6 x 1023), tentukan rumus empiris dan molekul senyawa tersebut

Soal B

• Jika 8,8gr C3H8 di bakar dengan gas oksigen dihasilkan sejumlah gaas CO2 dan uap air. Tentukan

a) Persamaan reaksib) Massa gas O2 yang di perlukan

c) Massa dan volume gas CO2 pada keadaan STP

Soal C

• Perbandingan massa karbon dan oksigen dalam senyawa karbon dioksida 3 : 8 a. berapa gr karbon yang dpt bereaksi dg 24 g oksigen?b. jika 6 g karbon direksikan dg 12 g oksigen, adakah unsur yang bersisa? Berapa g karbon dioksida yang terbentuk?c. berapa gram karbon dan oksigen yg harus direaksikan untuk membentuk 33 g senyawa karbon dioksida

1. 2 C4H10 + 13 O2 -> 8 CO2 + 10 H2O

a) what mass of O2 will react with 400 g C4H10?

b) how many moles of water are formed in a)?2. 3 HCl + Al(OH)3 -> 3 H2O + AlCl3

How many grams of aluminum hydroxide will react with 5.3 moles of HCl?

3. Ca(ClO3)2 -> CaCl2 + 3 O2

What mass of O2 results from the decomposition of 1.00 kg of calcium chlorate?

4. The reaction of Ca with water can be predicted using the activity series. What mass of water is needed to completely react with 2.35 g of Ca?

5. Fe2O3 + 3CO -> 2Fe + 3CO2.

a) How many moles of carbon monoxide are required to react with 163.0 g of iron(III) oxide?

b) How many grams of CO2 are produced from a reaction that also produces 23.9 grams of Fe?

6. 3Cu + 8HNO3 3Cu(NO3)2 + 4H2O + 2NO

c) how many moles of copper(II) nitrate can be prepared from 17.0 moles of Cu?

d) how many grams of copper(II) nitrate can be prepared using 3.8 moles of HNO3?

e) what mass of water results from the reaction of 8.50 kg of copper metal?