
HUKUM DASAR KIMIA
Authored by Yesika Rumapea
Chemistry
10th Grade
Used 4+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Pada wadah tertutup padatan kalsium bermassa 10 gram dibakar menggunakan oksigen membentuk kalsium oksida. Jika massa kalsium oksida yang dihasilkan sebanyak 25 gram, massa oksigen yang dibutuhkan sebanyak….
2 gram
8 gram
10 gram
12 gram
15 gram
2.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Sejumlah karbon dibakar dengan 32 gram oksigen, menghasilkan 56 gram karbon monoksida. Jika pada akhir reaksi masih terdapat 6 gram karbon. Massa mula-mula karbon adalah….
25 gram
28 gram
30 gram
32 gram
38 gram
3.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Perhatikan pernyataan berikut.
1. 8 gram besi + 6 gram oksigen = 14 gram besi (II) oksida
2. 1,5 gram karbon + 4 gram oksigen = 4,5 gram karbon dioksida
3. 12 gram besi + 10 gram oksigen = 22 gram besi (III) oksida
4. 0,5 gram belerang + 1,8 gram besi = 2,3 gram besi (II) sulfida
5. 11 gram logam Na + 14 gram gas klor = 25 gram natrium klorida
Pernyataan-pernyataan di atas yang sesuai dengan hukum kekekalan massa ditunjukkan oleh nomor …
1,2,3 dan 4
1,2,3 dan 5
1,2,4 dan 5
1,3,4 dan 5
2,3,4 dan 5
4.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Persentase tembaga dan oksigen dalam setiap sampel CuO yang diperoleh melalui metode yang berbeda-beda adalah sama. Hal ini membuktikan hukum ....
perbandingan tetap
perbandingan terbalik
perbandingan berganda
perbandingan volume
salah semua
5.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Jika di dalam senyawa FeS perbandingan massa Fe:S =7:4, maka untuk menghasilkan 4,4 gram senyawa FeS diperlukan Fe dan S berurut-turut sebanyak ...
4,0 gram dan 0,4 gram
3,7 gram dan 0,7 gram
2,8 gram dan 1,6 gram
3,0 gram dan 1,4 gram
3,2 gram dan 1,2 gram
6.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Di dalam senyawa CaS, perbandingan massa Ca:S=5:4. Jika 10 gram kalsium direaksikan dengan 9 gram serbuk belerang, maka massa CaS yang dihasilkan sebanyak ...
9 gram
9,5 gram
10 gram
18 gram
19 gram
7.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Dari peristiwa-peristiwa berikut, yang menunjukkan contoh penerapan hukum konversi massa adalah….
12 g C dipanaskan dalam ruang hampa, tidak ada perubahan massa
12 g C bergabung dengan 32 g O2 membentuk 44 g O2
Massa sekeping Pt sebelum dan sesudah dipanaskan adalah sama
Sampel udara bertambah volumenya jika dipanaskan pada tekanan tetap, tetapi massanya tidak berubah
1 liter N2 bereaksi dengan 3 liter H2 menghasilkan 2 liter NH3
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