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

Practice 10 high yield MCQs on Chemistry from Chapter Basic Concepts for USAT E 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. How many particles are in one mole?



24. What is Avogadro's number?



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



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



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



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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