This is a conversion question.

2.78mg to ___________ kg.

I've tried the standard formula - ex
(2.5 m) (1000m/1m)=2500mm - but it just gives me 2.78e-6.

Please help it's driving me crazy.

To convert 2.78 mg to kg, you need to understand the relationship between milligrams and kilograms.

1 kilogram (kg) is equal to 1,000 grams.
1 gram (g) is equal to 1,000 milligrams (mg).

So, if you want to convert milligrams to kilograms, you need to divide the milligrams by 1,000,000 (which is equal to 1,000 x 1,000).

Here's the step-by-step calculation:

1. Start with 2.78 mg.
2. Divide 2.78 by 1,000,000:

2.78 mg ÷ 1,000,000 = 0.00000278 kg

Therefore, 2.78 mg is equal to 0.00000278 kg.

Don't worry if you're seeing the "e-6" at the end of your result. This is called scientific notation, and it represents a way to express very small numbers. In scientific notation, 2.78e-6 means 2.78 multiplied by 10 raised to the power of -6, which is equivalent to 0.00000278.

So, both 0.00000278 kg and 2.78e-6 kg are correct representations of the conversion.