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The solubility of kno3 is 155g per 100g of water at 75 degree c and 38g at 25degreec the mass of kno3 will crystallize out of solution if 100g of it saturated solution is cooled from 75c to 25 c is?
I have read two methods to solve this up: the first says that at 75 degrees the solution mass is 100g of water + 155 g of KNO3 so its mass is 255g at 25 degrees the solution mass is 100 g of water + 38 g of KNO3 so its mass is 38 when we cool it down from 75 to 25 we will get 255-138=117g but this is the solution mass and u only want the mass of KNO3 because that is what will really crystallize...so for some reason i really dont get u do 117/255 and then multiply it by the mass of the demanded solution which is 100 g so the answer will be 45.88g nearly 45.9 g the second method is to assume that at 75 degrees there is in 100g of saturated solution, x g of water so KNO3 will be 1.55x total mass 100 x+1.55x=100 x= 39.126 1.55x=60.784 so at 25 degrees there is 0.39 x of KNO3 and x is 39.126 that means there is 0.38*39.126= 14.867 g of KNO3 therefore the mass of KNO3 that will crystallize is 60.784-14.867=45.917= 45.917 why 1.55x? because for each 100 g of water we have 155 g of solute...so 155/100 = the mass of solute for the new water mass/ the new water mass (x) so the mass of solute for the new water mass will be: 155x/100 or 1.55x! the same applies to 0.38x hope this helped =)
Find the molar mass of NiSO4?
The molar mass of NiSO4 (nickel(II) sulfate) is calculated by adding the atomic masses of each element present in the compound: Ni (nickel) has a molar mass of approximately 58.69 g/mol, S (sulfur) has a molar mass of approximately 32.06 g/mol, and O (oxygen) has a molar mass of approximately 16.00 g/mol. Therefore, the molar mass of NiSO4 is approximately 154.76 g/mol.
How many kilograms is 155g?
1000 grams = 1 kilograms 155 grams = 0.155 kilogram
How may cups is in 155g of cold water?
155g is equal to 1 cup
What is bigger 155g or 5.64 Oz?
Answer: 5.64 ounces is larger. 155g = 5.47 ounces.
How many cups of flour is 155g?
155g of all-purpose flour equals 1.24 cups (or 1 6/25 cups). This rounds out to 1 1/4 cups.
What is the density of the fluid in a car battery if it has a volume of 125ml and a mass of 155g?
density = mass / volume = 1.24 g/ml
Weight of a kidney in humans?
in males the average weight of kidney is 125g to 170g whereas in females it weighs 115g to 155g
What is the weight of kidney in male?
Kidney of a male what? The kidney of a shrew is small the kidney of an elephant is big. We can only answer questions for you if take the time and trouble to make sure they are clear and precise.
What is the density if a car has a volume of 125mL and a mass of 155g?
Density = mass/volume = 155/125 = 1.24 g/cm3.
How many moles of Ag are produced from 155g Ag2O?
[155 (g Ag2O) / 231.8 (g Ag2O/mol Ag2O)] * 2 (mol Ag/mol Ag2O) == 310/231.8 mol Ag = 1.337 == 1.34 mole Ag
The solubility of kno3 is 155g per 100g of water at 75 degree c and 38g at 25degreec the mass of kno3 will crystallize out of solution if 100g of it saturated solution is cooled from 75c to 25 c is?
I have read two methods to solve this up: the first says that at 75 degrees the solution mass is 100g of water + 155 g of KNO3 so its mass is 255g at 25 degrees the solution mass is 100 g of water + 38 g of KNO3 so its mass is 38 when we cool it down from 75 to 25 we will get 255-138=117g but this is the solution mass and u only want the mass of KNO3 because that is what will really crystallize...so for some reason i really dont get u do 117/255 and then multiply it by the mass of the demanded solution which is 100 g so the answer will be 45.88g nearly 45.9 g the second method is to assume that at 75 degrees there is in 100g of saturated solution, x g of water so KNO3 will be 1.55x total mass 100 x+1.55x=100 x= 39.126 1.55x=60.784 so at 25 degrees there is 0.39 x of KNO3 and x is 39.126 that means there is 0.38*39.126= 14.867 g of KNO3 therefore the mass of KNO3 that will crystallize is 60.784-14.867=45.917= 45.917 why 1.55x? because for each 100 g of water we have 155 g of solute...so 155/100 = the mass of solute for the new water mass/ the new water mass (x) so the mass of solute for the new water mass will be: 155x/100 or 1.55x! the same applies to 0.38x hope this helped =)
Where to buy fairy household soap?
Fairy Household Soap (2 x 155g bars per twin pack) has been discontinued by Proctor & Gamble. Jupiter Imports (UK) .lifebuoy.co.uk has some supplies. Maybe the only supplier in the UK now. Most good supermarkets suppy this line
How many calories in a McDonald's pumpkin pie?
In a commercially prepared pumpkin pie there are:approx 376 calories for 1 slice weighing 155g or 5.4 ozapprox 243 calories for 1 slice weighing 3½ ounces or 100gapprox 68 calories for each ounce or 28g of pumpkin pie.In a homemade pumpkin pie prepared from a traditional recipe there are:approx 316 calories for 1 slice weighing 155g or 5.4 ozapprox 204 calories for 1 slice weighing 3½ ounces or 100gapprox 57 calories for each ounce or 28g.
