1. What do you call to the unit amount of a substance used for measuring large quantities of very small entities such as atomd, molecules, or other specified particle like counting molecules of medicine in 0.20g infusion? A. Mole B. Molecular Unit c. Molecules D. Formula Unit
1. What do you call to the unit amount of a substance used for measuring large quantities of very small entities such as atomd, molecules, or other specified particle like counting molecules of medicine in 0.20g infusion?
A. Mole
B. Molecular Unit
c. Molecules
D. Formula Unit
2. Who was credited for the idea of that the number of molecules in the substance proportional to its physical mass?
A. Amadeo Avogadro
B. Emedeo Avogardo
C. Jean Baptiste Perrin
D. Jean Loschmidt
3. In Hubei China, Ten hospitals were used to do a trial for Remdesivir drugs. Patients age 18 and above was admitted with a laboratory confirmed SARS COV 2 infection. Patients were assigned to intake 0.20 g of Redmesivir on the first day and followed by 0.10 g on the following days. How much molecules of Remdesivir was used on the first day?
A. 1998 x 1018 molecules of C27H35N6O8P
B. 1998 x 1019 molecules of C27H35N6O8P
C. 1998 x 1020 molecules of C27H35N6O8P
D. 1998 x 1021 molecules of C27H35N6O8P
4. A mole consists of how many particles?
A. 6.02 x 1021 particles
A. 6.02 x 1022 particles
A. 6.02 x 1023 particles
A. 6.02 x 1024 particles
5. What do you call to the number of nits in one mole of any substance numerically equal to 6.022 X 1023 particles.
A.
B. Avogadro's calculation
C. Perrin's Number
D. Loschmidt constant
6. Which of the following best describes why mole is important?
A. In a laboratory, chemists weigh out amounts of subsatances like iron and sulfur to count the equal numbers of atoms on it.
B. Japan pharmaceutical scientists use the unit of mole to count the Favipiravir molecule ina substance.
C. It is used to count Niacinamide molecules in some specific beauty products.
D. All of the above
7. Which of the following units used to express the amount of substances in getting the number of particles?
A. Formula unit
B. Gram
C. Mililiter
D. Mole
8. Carbon disulfide is a liquid that can be used in the production of rayon and cellophane. It is manufactured from methane and elemental sulfur according to the following chemical equation: CH4 (g) + 4S2 (l) + 2H2S (g). How many moles of CS2 can be formed by the complete reaction of 10.6 mole of S?
A. 1.00 mol
B. 10.60 mol
C. 2.65 mol
D. 42.40 mol
9. Nitrous oxide (N2O), if one of the greenhouse gases, always use to add power to some cars but in reality it makes our ozone layer to deplete. If 200g of nitrous oxide was used, how many molecules of nitrous oxide (molar mass = 44.013 g/mol) will be added in the atmosphere?
A. 2.74 x 1020 particles of N2O
B. 2.74 x 1021 particles of N2O
C. 2.74 x 1023 particles of N2O
D. 2.74 x 1024 particles of N2O
10. Using a periodic table, what is the mass of Oxygen?
A. 113
B. 14
C. 16
D. 17
11. Concentrated ammonia gas can kill us due to their chemical properties; specifically it targets our lungs. How many molar mass does ammonia (NH3) have?
A. 17. 01 g/mol
B. 18. 01 g/mol
C. 19. 01 g/mol
D. 20. 01 g/mol
12. A cup contains 20g water. How many moles does the water have?
A. 0.76 mol
B. 0.81 mol
C. 0.93 mol
D. 1.11 mol
13. CO2 is one fo the greenhouse gases. If 60g of CO2 released, how many molecules will be added?
A. 7.20 x 1023 particles CO2
B. 8.20 x 1023 particles CO2
C. 9.20 x 1023 particles CO2
D. 10.20 x 1023 particles CO2
14. Romeo preserves a dozen of milkfish for his birthday celebration. He used 200g of NaCl to fully preserve it in just 3 days. How many moles of NaCl do the 200g have?
A. 1. 42 mole NaCl
B. 2. 42 mole NaCl
C. 3. 42 mole NaCl
D. 4. 42 mole NaCl
15. Which of the following can be used mole as a unit to count paticles/atoms?
A. Pharmaceutical scientists count C27H35N6O8P particles in a Remdesivir drug to treat the severity of the CoVid 19 patients.
B. Farmers weigh 500 grams of rice to count how many rice are present.
C. A buyer counts the oranges inside of a 500 g box.
D. Count of Face masks given in 2 barangays.
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