Selasa, 05 Juli 2011

Soal-Soal Perhitungan Kimia Kelas X

Morning, guys.. hehehe
Kali ini aku mau posting beberapa soal-soal KIMIA bab PERHITUNGAN KIMIA (kelas X) buad uji kompetensi kalian ato kalo gak ya buad ngumpulin tugas remidi.. wkwkwk J soal ini berbahasa inggris, kawan. Mengingat sekolahku bertaraf internasional (baru rintisan, hehe) makanya tugas-tugas dan lain-lain musti menggunakan bahasa inggris. Silahkan dilihat, dibaca, disalin, dan pastinya juga dikerjakan yaa. See u.. J


PERHITUNGAN KIMIA


1.      Relative molecular mass is the sum of the relative atomic mass of atoms in molecular formula. If the relative atomic mass of Ca = 40, Cl = 35.5, H = 1, O = 16, then the relative molecular mass compounds hydrate CaCl2. 6H2O is .... 
A. 111 
B. 123 
C. 139 
D. 219 
E. 235
2.      A reaction is said to equal if the number of atoms of the element equal to the number of atoms reacting element of the reaction. Not equivalent to the following equation:
a CaCO3 (s) + b HCl (aq) → c CaCl2 (aq) + d H2O (l) + CO2 (g)
Reaction equation will be equivalent if the price of a, b, c and d, respectively .... 
A. 1, 1, 2, 1
B. 1, 1, 1, 2 
C. 1, 2, 1, 1 
D. 2, 1, 1, 1 
E. 2, 2, 1, 1
3.      In the equation for the equivalent mole ratio equal force coefficient comparison. Compounds of iron (II) sulfide is reacted with hydrochloric acid solution according to the equation: 
        FeS (s) + 2 HCl (aq) → FeCl2 (aq) + H2S (g) 
If the resulting equation for 5.6 liters of H2S gas (STP), then the mass of iron (II) sulfide (Mr = 88) that reacts is .... 
A. 22 grams 
B. 29 grams 
C. 35 grams 
D. 56 grams 
E. 59 grams
4.      A deposition occurs when the product of the concentration of ions is greater than its Ksp. In one experiment, three test tubes, each containing 10 ml of 0.01 M solution of CaCl2, and BaCl2 SrCl2, each tube is added 10 ml solution of 0.01 M K2SO4 If Ksp CaSO4 = 2 x 10-4; SrSO4 = 2 x 10-7; BaSO4 = 9 x 10-11, then the salt buildup is .... 
A. BaSO4 
B. CaSO4 and SrSO4 
C. CaSO4 and BaSO4 
D. SrSO4 and BaSO4 
E. CaSO4, BaSO4, and SrSO4
5.      Relative molecular mass of the solute can be determined if the pressure osmotic and temperature of the solution and the solute mass is known. 
A total of 1.27 grams of electrolyte substances dissolved LCl2 at 270 C in water until the volume of 500 ml. solution osmotic pressure = 1.476 atm and R = 0.082 l atm / mol.K then Mr. electrolyte substance is .... 
A. 127 
B. 172
C. 254 
D. 285 
E. 324
6.   10 liters of gaseous hydrocarbons (CxHy) burned perfectly with 30 liters of oxygen gas to produce 20 liters of gaseous carbon dioxide and water vapor. So CxHy molecular formula is: 
A. C4H10 
B. C3H8
C. C2H6 
D. C2H4
E. CH4 
7.   In (T, P) the same mixture of gases consisting of methane (CH4) and ethane (C2H6) 10 liters of gas burned perfectly with 26 liters of oxygen gas, producing CO2 and water vapor, the composition of the gas mixture consists of: 
A. 3 liters of CH and 7 liters of C2H6 
B. 4 liters of CH4 and 6 liters of C2H6 
C. 5 liters of CH4 and 5 liters of C2H6 
D. 7 liters of CH4 and 3 liters of C2H6 
E. 6 liters of CH4 and 4 liters of C2H6 
8.   9 grams aluminum 8 grams of appropriate action with oxygen to form 17 grams Al2O3. If, after the reaction is obtained 102 grams of aluminum oxide and 15 grams of residual aluminum. So the first first aluminum mass is : 
A. 20 grams 
B. 40 grams 
C. 48 grams
      D. 54 grams
E. 69 grams
9.   In (T, P) the same 50 ml of phosphorus trichloride gas is reacted with chlorine gas to form phosphorus penta chloride gas. The volume of gas that forms phosphorus pentachloride are: 
A. 30 ml 
B. 40 ml 
C. 50 ml 
D. 60 ml
      E. 70 ml
10. Mass ratio of calcium and oxygen in the form of calcium oxide is 5: 2. If 10 grams of calcium is reacted with 5 grams of oxygen, the calcium oxide formed is: 
A. 5 grams 
B. 10 grams 
C. 14 grams 
D. 15 grams
E. 20 grams
11. For complete combustion of C2H4 at 10 liters (T, P) the same produce CO2 and water vapor. If the oxygen levels in the air 20% of the air needed for combustion is .... 
A. 50 liters  
B. 75 liters 
C.100 liter 
D. 125 liters
E. 150 liters
12. Known 5.6 liters of XO3 gas (STP) has a mass of 20 grams. So the relative atomic mass of X is .... (O = 16) 
A. 16 
B. 24 
C. 32 
D. 40 
E. 64 
13. Known mass of C atoms in CaCO3 is 24 grams. So the mass of CaCO3 molecule is .... (Ca = 40; C = 12; O = 16)! 
A. 50 grams 
B. 75 grams 
C. 100 grams 
D. 120 grams 
E. 200 grams 
14. Volume 10 grams of C3H4 gas (STP) is .... (C = 12; H = 1) 
A. 22.4 liters 
B. 11.2 liters 
C. 5.6 liter 
D. 2.8 liter 
E. 1.4 liters 
15. The mass of 2,408 . 1022 MgSO4 molecule is ... .. (Mg = 24; S = 32; O = 16) 
A. 4.8 grams 
B. 9.6 grams 
C. 14.4 grams 
D. 19.2 grams 
E. 96 grams 
16. Number of Cl-ions contained in 400 ml of 0.3 M AlCl3 solution is .... 
A. 1,44 . 1022 
B. 2,408 . 1022 
C. 7,2 . 1022 
D. 2,17 . 1023 
E. 2,408 . 1023 
17. Known 26.4 grams (NH4) 2SO4. The mass of nitrogen atoms in the compound is .... (N = 14; H = 1; S = 32; O = 16) 
A. 5.6 grams 
B. 2.8 grams 
C. 1.4 grams 
D. 1.05 grams 
E. 0.7 grams
18. From the reaction that acts as a reagent is: 
A. H2SO4
B. H2
C. H2 and Fe
D. Fe2 (SO4) 3
E. Fe and H2SO4 
19. Mol iron (Fe) of ... mol 
A. 0.2
B. 0.1
C. 0.4
D. 56
E. 0.3 
20. From the reaction that acts as a limiting reagent (reagent which reacts out) is: 
A.H2SO4
B. H2
C. Fe
D. Fe2 (SO4) 3
E. Fe and H2SO4 
21. Ne of the reaction products of the reaction equation above is ... with relative atomic mass (Mr) of ... gram / mol 
A. Fe by 56
B.H2 at 1
C. Fe2 (SO4)3 of 400 
D. Fe2 (SO4)3 by 0.1
E. H2SO4 at 98 
22. Which of the following compounds containing the smallest number of molecules? 
A. 32 grams of CO2 (Mr = 44)
B. 16 grams O2 (Mr = 32)
C. 8 grams of CH4 (Mr = 16) 
D. 8 grams N2 (Mr = 28)
E. 4 grams of H2 (Mr = 2) 
23. A compound formed from 1.12 grams of carbon and 3.52 grams of hydrogen elements whose mass is burned perfect produce CO2 gas and 1.44 grams of water vapor (H2O). If Ar C = 12, H = 1, and O = 16. Empirical formula of these compounds are ... 
A. CH
B. CH2
C. CH3
D. CH4
E. C2H 
24. Comparison of the carbon and oxygen in carbon dioxide is 3: 8. If 3 grams of carbon is reacted with 16 grams of oxygen, the carbon dioxide that is formed is ... 
A. 11 grams
B. 17 grams
C. 18 grams
D. 19 grams
E. 25 grams 
25. At Burning 12 grams of a carbon compound produced 22 grams of CO2 gas (Ar C = 12; O = 16). Porsentase the element carbon in these compounds are ... 
A. 23%
B. 27%
C. 50%
D. 55%
E. 77% 

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