One bottle contains 250 cm3 of saline (diluted solution of NaCl in water) with a saline concentration of 9 g / l. How many grams of NaCl does that bottle contain?

What was the important event between the united states and cuba in 1991? a.assigned clinics b.greater number of tourists c.seizure d.increased import and export flow

The teacher didn't explain this at all and i don't understand this

Select the best translation for the following term or phrase. what did i do? ¿qué es eso? ¿qué puedo hacer? ¿qué quiere decir ? ¿qué hice?