Answer:
The graph can show you how much distilled water for 4 milliliters of ammonia and 5 milliliters of ammonia. You can use the graph to find 4.5 by find the midpoint of two amounts of distilled water. Such as, say that 4 milliliters of ammonia = 200 distilled water and 5 milliliters of ammonia= 250 distilled water. Then the answer to 4.5 milliliters of ammonia is 225 distilled water.
Step-by-step explanation:
This looks crazy hard!!!!!
Its a right angled triangle. You have C and have B all you need to find is A. usually for a question like this you would use the Pythagorean theorem which is A2+B2=C2 but since we already have c we will use C2-B2=A2
Now we fill in the values. (21)2-(9)2=A2
441-81=360^2 so now with the 360^2 we have to squareroot it so the square root of 360 is 18.973f
Target concentration = 20%.
Ratio of 12% and 30% alcohols needed
30-20 : 20-12 = 10:8 = 5:4
Volume of 12% = 72 mL * (5/(5+4)) = 40 mL
Volume of 30% = 72 mL *(4/(5+4)) = 32 mL
Total = 40+32 = 72 mL of 20%
Answer:
c
Step-by-step explanation:
