Can someone please help me answer these questions, please? Thank you!

CHEM 25821 Unit 1 Lab 2 Assignment 1. How many significant figures are in each of the following numbers? A. 0.0035 B. 1.080 C.2371 D. 2.97% 10% 2. What is used to measure mass? 3. A student is given 3.8mL of methyl benzoate in a clean 50mL. round bottom flask and its reacted with 1.8mL of 85% (conc.) sulfuric acid and 3.7 mL of nitric acid. The solution stirred for 20 minutes, followed by the addition of 50mL of ice, and stirred for 10 minutes. The final product is Methyl 3-nitrobenzoate. The mass of the final product is 1.92g. Calculate percent yield Interpret IR spectrum of product (Blackboard). Indicate keys peaks and functional groups. NETHYL M-NITROBENZORTE CHINO