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

2.1 x 10¹²ng

Step-by-step 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