The reaction times for three trials of an experiment are 80.3, 80.2, and 80.5 seconds. Which average time is expressed using the correct number of significant figures?

A. 80.3

B. 80.33

C. 80

D. 80.333

A student investigated the rate of reaction between sodium thiosulphate and dilute hydrochloric acid the student placed a conical flask over a cross on a piece of paper the student mixed the solutions in the flask the solution went cloudy the

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Suppose a solution was too concentrated for an accurate reading with the spectrophotometer. The concentrated solution was diluted by placing 1.00 mL of the concentrated solution in 4.00 mL of water.

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