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HEC ETC - USAT M Entry Test - Chemistry - Basic Concepts - Quiz 3

Practice 10 high yield MCQs on Chemistry from Chapter Basic Concepts for USAT M Entry Test. After submission, get instant results with correct answers and detailed explanations. This is Quiz 3 of the series.

21. How many significant figures are in 4500.?



22. What is 0.00045 in scientific notation?



23. What is Avogadro's number?



24. What is the molar mass of carbon-12?



25. How many moles are in 24 g of carbon? (Molar mass of C = 12 g/mol)



26. What is the mass of 2 moles of water? (H₂O molar mass = 18 g/mol)



27. How many moles are in 1.204 × 10²⁴ atoms?



28. What is an empirical formula?



29. What is a molecular formula?



30. What is the empirical formula of glucose (C₆H₁₂O₆)?



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Instructions: Select one answer per question. After submitting, you will see your score, correct answers, and explanations.

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