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1.) What law supports the equation below?
50g of Ca + 75g H2O ------> 100g Ca(OH)2 + 25g O2
a. Law of conservation of mass
b. Law of definite proportion
c. Law of multiple proportion
d. none of these
2.) Substance A taht has a mass of 100g and a ratio of it's components equal to 1:2 in Malaysia found out that has a similarity in substance B that contains 50g in the Philippines. What law explains this situation?
a. Law of conservation of mass
b. Law of definite proportion
c. Law of multiple proportion
d. none of these
3.) Which of the following law says that in any particular compound, all samples of that compound is made up of the same element in the same proportion or ratio?
a. Law of conservation of mass
b. Law of definite proportion
c. Law of multiple proportion
d. none of these
4.) When two atoms will combine, which of the following is impossible to happen?
a. They remain as atoms
b. They will combine to form compounds
c. They form molecules
d. all of the above
5.) What is the chemical name of H3PO4?
a. Hydrogen phosphate
b. Trihydrogen phosphate
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Answer:
1. a. Law of conservation of mass
2. c. Law of multiple proportion
3. b. Law of definite proportion
4. a. They remain as atoms
5. b. Trihydrogen phosphate
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