Question

mass:

1. convert 350 mg to kilograms (kg)?
2. a sample of potassium is 0.35 grams (g). convert to milligrams (mg)?
3. how many milligrams (mg) are in 2.5 grams (g) of sodium?

Explanation:

Question 3

Step1: Recall unit conversions

We know that \(1\space kg = 1000\space g\) and \(1\space g = 1000\space mg\), so \(1\space kg = 1000\times1000\space mg= 10^{6}\space mg\). So to convert milligrams to kilograms, we divide by \(10^{6}\).

Step2: Perform the conversion

We have \(350\space mg\). To convert to kilograms, we do \(350\div10^{6}\) kilograms.
\(350\div10^{6}=\frac{350}{1000000} = 3.5\times 10^{-4}\space kg\)

Step1: Recall unit conversion

We know that \(1\space g= 1000\space mg\). So to convert grams to milligrams, we multiply by \(1000\).

Step2: Perform the conversion

We have \(0.35\space g\). To convert to milligrams, we do \(0.35\times1000\) milligrams.
\(0.35\times1000 = 350\space mg\)

Step1: Recall unit conversion

We know that \(1\space g = 1000\space mg\). So to convert grams to milligrams, we multiply by \(1000\).

Step2: Perform the conversion

We have \(2.5\space g\). To convert to milligrams, we do \(2.5\times1000\) milligrams.
\(2.5\times1000=2500\space mg\)

Answer:

\(3.5\times 10^{-4}\space kg\)

Question 4