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Find the mass of urea

the concentration of urea in a solution prepared by dissolving 16g of urea in 39 g of H2O is ________% by mass. The molar mass
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2. asked by jen
3. 3,003 views
Find the mass of urea needed to prepare 51.7 of a solution in water in which the mole fraction of urea is 7.80×10−2.
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2. asked by amy
3. 1,048 views
Find the mass of urea needed to prepare 50.1 of a solution in water in which the mole fraction of urea is 7.50×10−2.
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2. asked by Kelley
3. 817 views
Find the mass of urea (CH4N2O) needed to prepare 50.9 g of a solution in water in which the mole fraction of urea is
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2. asked by Nicole
3. 2,439 views
Find the mass of urea needed to prepare 51.7 g of a solution in water in which the mole fraction of urea is 7.59×10−2. anyone
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2. asked by jazz
3. 990 views
If a 8.0mL sample of blood plasma has a mass of 8.223g and contains 1.233g of urea, what is the mass/mass percent concentration
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2. asked by Elaine
3. 450 views
How many grams of Urea would you have to dissolve in 500ml of H2O in order for the mass percent of H2O to be 88.8%? What is the
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2. asked by regina
3. 511 views
Given the two substances Sodium Nitrate (NaNO3) and Urea ([NO2]2CO), why is it that urea has a lower boiling point? I thought
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2. asked by Vic
3. 1,100 views
The concentration of urea (CH4N2O) in a sample of urine is 8.8number of significant figures. Note: Reference the SI prefixes
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2. 51 views
The concentration of urea (CH4N2O) in a sample of urine is 8.8number of significant figures. Note: Reference the SI prefixes
1. 1 answer
2. 65 views