2.524 g (5.1 × 106 g) ÷ (6.85 × 103 g) = ? how many significant figures should the result have?

Explanation:

To solve the equation, we will first multiply the numerator and denominator separately and then divide it, to attain the final result.

The equation given is:

Whenever multiplication and division are involved, the answer must not contain, more number of significant figures as there are in the least precise term.

Of all the given terms, the least precise number has 2 significant numbers. Therefore, the answer  would have 2 significant figures and the final answer will be 1.9

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml