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Let a be the number of ounces of 25% alcohol required. Then, 25a + (30x9) = 28(9 + a) 25a + 270 = 252 + 28a 3a = 18 a = 6 Then 6 ounces of 25% alcohol + 9 ounces of 30% alcohol produces 15 ounces of 28% alcohol.
684 ml
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There are 3 litres of alcohol in your starting mixture of 4 litres. If you add 6 litres of water you will have 3 litres of alcohol in a total of 10 litres. This is the required strength.
x = volume of 95% y = volume of 30% so (x+y) is volume of 70% 0.95 x + 0.30 y = 0.70(x+y) 0.95 x + 0.30 y = 0.70x + 0.70y 0.25x = 0.40y x/y = 0.40/0.25 = 8/5 for every 8 volumes of 95% mix in 5 volumes of 30%the volumes can be ml, liters, cups, pints etc.
30 kelvin
30 percent
Freezing point would depend upon proportion of alcohol and water .
There are different hand sanitizer formulations. Look for the active ingredient. If the label says "Ethyl Alcohol" "Isopropanol" or "Methyl Alcohol", you can be confident that the hand sanitizer will only freeze at a very low temperature (-174 degrees F.). Keep in mind that other ingredients may begin to freeze before the alcohol will. Hand sanitizers based on other active ingredients may freeze at temperatures as high as 30 degrees F.
To find the percentage of alcohol, you cut the proof in half. So 60-proof vodka would be 30% alcohol.
Let a be the number of ounces of 25% alcohol required. Then, 25a + (30x9) = 28(9 + a) 25a + 270 = 252 + 28a 3a = 18 a = 6 Then 6 ounces of 25% alcohol + 9 ounces of 30% alcohol produces 15 ounces of 28% alcohol.
true
684 ml
Dissolve 30 g potassium hydroxide in 100 mL methylic alcohol.
If WE Use 90% alcohol it will get evaporated, for 30% alcohol no reaction occurs as water content will be high . so, 70% is used
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70% alcohol signifies the amount the alcohol present in 100 ml of the solution. Considering the solvent to be water, 70% alcohol contains 70ml alcohol and 30ml water. Thus, the total comes out to 70 + 30 = 100ml. That's what the "%" signifies - (out of 100!)