16 is C
17 is E
18 is B
19 is A
20 is D
hope this helps :)
Iodine value is a measure of the degree of unsaturation in fats and oils. It is essentially the number of grams of iodine consumed by 100 g of fat. If the iodine number is in the range of 0-70 then it is a fat, any value above 70 is considered an oil.
Formula:
Iodine number = (ml of 0.1 N Thiosulphate blank- ml of 0.1N thiosulphate test) * 12.7 *100/1000* wt of sample
vol of thiosulphate required to titrate test sample (given oil) = 1 ml
wt of sample = 0.2 g
Information on the volume of thiosulphate required to titrate the blank solution is essential for calculation.
Iodine number = (X-1.0) * 12.7 * 100/1000* 0.2 = (X-1.0)*6.35
Answer:
Into seven sections based on frequency
Explanation:
There are 7 em spectrums from radio waves, to infrared waves, to gamma rays listest in order from lowest to highest frequency.
Answer:
20.8 Lof NH₃ are needed for the reaction
Explanation:
This is the reaction:
4 NH₃ + 6 NO → 5N₂ + 6H₂O
and the info. we need
Ammonia density = 0,00073 g/mL
Let's determine the moles of NO at STP by the Ideal Gases Law equation
P . V = n . R .T
1atm . 30L = n . 0.082 . 273K
(1atm . 30L) / (0.082 . 273K) = n → 1.34 moles of NO
Let's find out the amount of ammonia that should react
6 mol of NO react with 4 mol of ammonia
1.34 mol of NO will react with (1.34 .4)/6 = 0.893 moles of ammonia
Molar mass NH₃ = 17 g/m
0.893 mol . 17 g/m = 15.19 g of ammonia
Ammonia density = 0,00073 g/mL = NH₃ mass / NH₃ volume
0,00073 g/mL = 15.19 g / NH₃ volume
NH₃ volume = 15.19 g / 0,00073 g/mL → 20805.5 mL ⇒ 20.8 L
Answer:
h1.
Explanation:
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