Soal Latihan Dasar-dasar Hukum Kimia

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  • 1/10 Pertanyaan

    Hukum Proust disebut juga ..

    • Hukum Perbandingan Volume
    • Hukum Perbandingan Berganda
    • Hukum Kekekalan Massa
    • Hukum Perbandingan Tetap
    • Hukum Kekekalan Energi
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Soal Latihan Dasar-dasar Hukum Kimia - Quiz

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  • 2. 

    Jika perbandingan massa hidrogen dan oksigen dalam air adalah 1 : 8, maka untuk menghasilkan 45 gram air dibutuhkan ....(Hukum)

    • 5 gram hidrogen dan 40 gram oksigen

    • 40 gram hidrogen dan 5 gram oksigen

    • 5 gram hidrogen dan 8 gram oksigen

    • 5 gram hidrogen dan 9 gram oksigen

    • 45 gram hidrogen dan 5 gram oksigen

    Correct Answer
    A. 5 gram hidrogen dan 40 gram oksigen
    Explanation
    The correct answer is 5 gram hidrogen dan 40 gram oksigen. This is because the ratio of hydrogen to oxygen in water is 1:8. Therefore, to produce 45 grams of water, we need 1/9 of that mass for hydrogen and 8/9 of that mass for oxygen. Calculating this, we get 5 grams of hydrogen and 40 grams of oxygen.

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  • 3. 

    Sebanyak 11,2 gram serbuk besi (Fe) dipanaskan secara sempurna dengan 6,4 gram serbuk belerang (S), sesuai reaksi:Fe + S  -->  FeSSenyawa besi(II) sulfida (FeS) yang terbentuk sebanyak … .(Hukum)

    • 6,4 gram

    • 11,2 gram

    • 12,8 gram

    • 17,6 gram

    • 22,4 gram

    Correct Answer
    A. 17,6 gram
    Explanation
    When 11.2 grams of iron powder (Fe) is heated with 6.4 grams of sulfur powder (S), the reaction produces iron(II) sulfide (FeS). According to the law of conservation of mass, the total mass of the reactants must be equal to the total mass of the products. Since the molar ratio between Fe and S in the reaction is 1:1, the mass of FeS formed will be equal to the mass of sulfur used. Therefore, the correct answer is 17.6 grams, which is the mass of sulfur used in the reaction.

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  • 4. 

    Pakar kimia yang menyatakan hukum perbandingan volume adalah … .

    • Boyle

    • Gay Lussac

    • Rutherford

    • Dalton

    • Avogadro

    Correct Answer
    A. Gay Lussac
    Explanation
    The correct answer is Gay Lussac. Gay Lussac is a chemist who formulated the law of combining volumes, which states that the volumes of gases involved in a chemical reaction are in a simple ratio to each other and to the volumes of the products and reactants. This law is an important principle in understanding the behavior of gases. Boyle, Rutherford, Dalton, and Avogadro are also well-known chemists, but they are not specifically associated with the law of combining volumes.

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  • 5. 

    Di antara reaksi berikut yang mengikuti hukum kekekalan massa adalah...

    • 5 gram belerang + 8 gram oksigen → 12 belerang oksida

    • 6 gram Carbon + 4 gram Oksigen → 11 gram Karbondioksida

    • 3 gram Natrium + 4 gram Klorida → 7 gram Natrium Klorida

    • 4 gram belerang + 10 gram oksigen → 14 belerang oksida

    • 2 gram belerang + 4 gram tembaga → 5 tembaga (II) sulfida

    Correct Answer
    A. 3 gram Natrium + 4 gram Klorida → 7 gram Natrium Klorida
    Explanation
    The given reaction of 3 grams of sodium and 4 grams of chloride forming 7 grams of sodium chloride follows the law of conservation of mass. This law states that mass cannot be created or destroyed in a chemical reaction, it can only be rearranged. In this reaction, the total mass of the reactants (3 grams + 4 grams = 7 grams) is equal to the total mass of the product (7 grams). Therefore, the reaction obeys the law of conservation of mass.

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  • 6. 

    Perbandingan massa atom-atom dalam senyawa adalah tetap. Pernyataan ini dikemukakan oleh ....

    • Lavoisier

    • Dalton

    • Proust

    • Gay-Lussac

    • Avogadro

    Correct Answer
    A. Proust
    Explanation
    The correct answer is Proust. This is because Proust's law of definite proportions states that the ratio of masses of elements in a compound is always constant. This means that the comparison of atomic masses in a compound remains fixed.

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  • 7. 
    Perbandingan Fe : S adalah ... - ProProfs

    Perbandingan Fe : S adalah ...

    • 1 : 2

    • 2 : 3

    • 4 : 3

    • 5 : 8

    • 7 : 8

    Correct Answer
    A. 7 : 8
    Explanation
    The correct answer is 7 : 8. This means that the ratio of Fe to S is 7 to 8. In other words, for every 7 units of Fe, there are 8 units of S.

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  • 8. 

    Diketahui senyawa:
    1. H2O
    2. S
    3. H2O2
    4. O2
    Senyawa yang memenuhi ketentuan Hukum Dalton adalah...

    • Pernyataan (1), (2) dan (3)

    • Pernyataan (1) dan (3)

    • Pernyataan (2) dan (4)

    • Pernyataan (4) saja benar

    • Semua jawaban benar

    Correct Answer
    A. Pernyataan (1) dan (3)
    Explanation
    The correct answer is "Pernyataan (1) dan (3)". This is because according to Dalton's Law, the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of the individual gases. In this case, statement (1) represents H2O, which is a compound of hydrogen and oxygen, and statement (3) represents O2, which is a molecule of oxygen. Both of these compounds are non-reacting gases, so their partial pressures can be added together to determine the total pressure. Therefore, only statements (1) and (3) satisfy Dalton's Law.

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  • 9. 

    Pada reaksi pembakaran gas propana:p C3H8 + q O2  -->  r CO2 + s H2Oreaksi akan menjadi setara bila p, q, r, dan s berturut-turut adalah …

    • 1, 5, 3, dan 4

    • 2, 3, 6, dan 4

    • 1, 2, 5, dan 2

    • 1, 3, 1, dan 3

    • 2, 5, 2, dan 1

    Correct Answer
    A. 1, 5, 3, dan 4
    Explanation
    The balanced equation for the combustion of propane is C3H8 + 5O2 --> 3CO2 + 4H2O. This means that for every molecule of propane (C3H8), we need 5 molecules of oxygen (O2) to produce 3 molecules of carbon dioxide (CO2) and 4 molecules of water (H2O). Therefore, the correct values for p, q, r, and s are 1, 5, 3, and 4 respectively.

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  • 10. 

    Jika diketahui massa atom relatif Fe = 56 ; S = 32 ; dan O = 16, maka massa besi yang terdapat dalam 4 gram Fe2(SO4)3 adalah…. 

    • 4,00 gram

    • 1,12 gram

    • 0,56 gram

    • 0,28 gram

    • 0,01 gram

    Correct Answer
    A. 0,56 gram
    Explanation
    The molar mass of Fe2(SO4)3 can be calculated by adding the atomic masses of its constituent elements. The molar mass of Fe2(SO4)3 is (2 x 56) + (3 x 32) + (12 x 16) = 160 + 96 + 192 = 448 g/mol. To find the mass of Fe in 4 grams of Fe2(SO4)3, we can use the ratio of the molar mass of Fe to the molar mass of Fe2(SO4)3. The molar mass of Fe is 56 g/mol. So, the mass of Fe in 4 grams of Fe2(SO4)3 is (56/448) x 4 = 0.56 grams.

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  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 08, 2016
    Quiz Created by
    Liliku
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