He pours the oven into 750 ml spray bottles. how many spray bottles can rob fill up completely from the 5 litre container?

To determine how many 750ml spray bottles we can fill, we need to figure out how much ml is in 1 liter.
1 liter is 1000 ml. We have 5 liters, so that means we have 5000 ml.
Now, to figure out how many 750ml spray bottles we can fill, we need to divide 5000, our total ml, by 750.
5000/750 = 6.66~, so we can fill approximately 6 ml spray bottles.
Your answer is ~6.
I hope this helps!