Jeff used an equal arm balance to weigh a 4.312 g sample of sodium chloride. which of these measurements made by jeff is the most accurate? (5 points) 4.5 g 4.1 g 4.2 g 4.3 g

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

How many moles are in 43.9 l of oxygen

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.