Question

A sample of calcium carbonate weighs 2.1 kilograms (kg). There are 1,000 grams (g) in 1 kg, and 1 Times. 109 nanograms (ng) in 1 g.What is the mass of this sample in ng?
2.1 x 10⁶ ng
2.1 x 10⁹ ng
2.1 x 10¹² ng
2.1 x 10³ ng

Answer 1

Answer:

2.1 x 10¹²ng

Explanation:

Mass of the calcium carbonate given is:

                    2.1kg  

We need to take this mass to nanogram, ng.

Since :

               1000g  = 1kg

           10⁹g  = 1ng

So;

          1kg  = 1000 x 10⁹ = 10¹²ng

So;

      2.1kg   will give;

                Since

              1kg  gives 10¹²ng

             2.1kg will give 2.1 x 10¹²ng