Question

If the density of a solution is 3.12 g mL⁻¹, the mass of 1.5 mL solution in significant figures is......
(a) 4.7 g
(b ) 4680 ×10⁻³ g
(c) 4.680 g
(d) 46.80 g

Answer 1

Density of solution = 3.12 g mL-1

Volume of solution =1.5 mL

Mass of solution = Volume x Density

= 1.5 mL x 3.12 g mL-1

= 4.68 g = 4.7 g (up to 2 significant figures) 

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Answer 2

Answer:

(a) 4.7 g

Explanation:

Density is described as mass consistent with volume,

d = m/v

Rearranging the above equation,

m = d X v

Given,

d = 3.12 g mL−1

v = 1.five mL

Thus,

m = 3.12 x 1.five = 4.sixty eight g

By rounding to 2 big figures ( on account that withinside the multiplication  is the least range of big determine )

We get 4.7 g

Thus option (a) is accurate.

Incorrect alternatives (b), (c), (d)

Since we want a solution with  big determine the opposite alternatives are incorrect.

Final Answer

The accurate solution is,

(a) 4.7 g

So,If the density of an answer is 3.12 g mL⁻¹, the mass of 1.five mL answer in big figures is 4.7.

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