Question

Which mass measurement contains four significant figures? 1. 0.086 g 2. 0.431 g 3. 1003 g 4. 3870 g

Answer 1

the answer is # 3

because #1 only has 2 sig figs, #2 has 3 sig figs, and #4 has 3 sig figs

Answer 2

(1) The given number in 4 significant figures will be,
`8.600* 10^(-2)g`

(2) The given number in 4 significant figures will be,
`4.310* 10^(-1)g`

(3) The given number in 4 significant figures will be,
`1.003* 10^3g`

(4) The given number in 4 significant figures will be,
`3.870* 10^3g`

Explanation :

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

(1) The given number 0.086 g converted into 4 significant figures.

In 0.086 g, there are 2 significant figures. Now we have to convert it into 4 significant figures.

The given number in 4 significant figures will be,
`8.600* 10^(-2)g`

(2) The given number 0.431 g converted into 4 significant figures.

In 0.431 g, there are 3 significant figures. Now we have to convert it into 4 significant figures.

The given number in 4 significant figures will be,
`4.310* 10^(-1)g`

(3) The given number 1003 g converted into 4 significant figures.

Now we have to convert it into 4 significant figures.

The given number in 4 significant figures will be,
`1.003* 10^3g`

(4) The given number 3870 g converted into 4 significant figures.

Now we have to convert it into 4 significant figures.

The given number in 4 significant figures will be,
`3.870* 10^3g`