What is the answer to 151.25 g + 0.507 g using significant digits? 151.757 grams

Question

What is the answer to 151.25 g + 0.507 g using significant digits? 151.757 grams 151.75700 grams 151.8 grams 151.76 grams 152 grams Which of the following is/are (an) example(s) of (a) chemical change(s): A car rusting Wood burning Ice melting All of the above A & B, but not C . 7. Which of the following statements is/are false: The scientific method involves observations, hypotheses and testing of a hypothesis In general, a theory cannot be proven to be absolutely true The scientific method is cyclic. That is to say earlier steps may be repeated more than once. None of the above A & B but not C

Explanation / Answer

5)

151.25 + 0.507 = 151.757 then, since only 3 sig fig are used, choose 151.7 round it 152

6)

chemical change:

car rusting = chemical reaction

wood burning = combustion, a reaction

ice melting = physical change, water is water

choose E

7)

a) true

b) true, this are theory, not laws

c) false, it is linear

chooes E

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