Substance solution
During spraying, there are 4 per mille of active substance per 6 l of water. How many ml of active substance do we add to the spray?
Correct answer:
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To solve this problem, we need to determine how many milliliters (ml) of active substance are added to the spray when the concentration is 4 per mille (4‰) in 6 liters (L) of water.
Step-by-Step Solution:
Understand "per mille":
Per mille (‰) means "per thousand," so 4‰ is equivalent to 4/1000 or 0.004 in decimal form.
Convert liters to milliliters:
Since 1L=1000ml, we convert 6 liters to milliliters:
6L = 6×1000 = 6000ml
Calculate the amount of active substance:
The amount of active substance is 4‰ of the total volume of water. Using the decimal form of 4‰ (0.004):
Active substance=6000ml×0.004
Active substance=24ml
Final Answer:
You need to add 24 ml of active substance to the spray.
Step-by-Step Solution:
Understand "per mille":
Per mille (‰) means "per thousand," so 4‰ is equivalent to 4/1000 or 0.004 in decimal form.
Convert liters to milliliters:
Since 1L=1000ml, we convert 6 liters to milliliters:
6L = 6×1000 = 6000ml
Calculate the amount of active substance:
The amount of active substance is 4‰ of the total volume of water. Using the decimal form of 4‰ (0.004):
Active substance=6000ml×0.004
Active substance=24ml
Final Answer:
You need to add 24 ml of active substance to the spray.
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