Answer:
4 grams
Step-by-step explanation:
Write and solve an equation of ratios:
x 2/3 l
------- = ----------
3 gr 1/2 l l
Cross-multiplying, we get (1/2) x liter = 2 gr-liter.
Dividing both sides by 1/2 liter, we get:
2 gr-liter 2
x = ------------------ = ------------ grams = 4 grams
1/2 liter 1/2
There are 4 grams of sodium in 2/3 of a liter of soda.
