How many grams of urea [(NH2)2CO] must be added to 400 g of water to give...

How many grams of urea [(NH2)2CO] must be added to 400 g of water to give a solution with a vapour pressure 2.50 mmHg less than that of pure water at 30°C? (The vapour pressure of water at 30°C is 31.8 mmHg.)

Expert Solution

queen_honey_blossom answered 1 year ago

How many grams of sucrose (C12H22O11) must be added to 477 g of water to give...

How many grams of sucrose (C12H22O11) must be added to 477 g of water to give a solution with a vapor pressure 0.555 mmHg less than that of pure water at 20 degrees celsius? (The vapor pressure of water at 20 degrees celsius is 17.5 mmHg).

You prepare a solution by adding 20.0 g Urea [(NH2)2CO] to 125 g water at 25.0oC...

You prepare a solution by adding 20.0 g Urea [(NH2)2CO] to 125 g water at 25.0oC & vapor pressure 23.76 torr. The solution vapor pressure is 22.67 torr. Calculate the molecular weight of urea. XH2O = ________ moles H2O = ________ Xsolute = ________ moles urea = ________ molar mass = ________

Urea (NH2)2CO is prepared by reactign ammonia with carbon dioxide. The byproduct is water. 637.2g of...

Urea (NH2)2CO is prepared by reactign ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3g of carbon dioxide. A) write a balanced equation B) Determine which of the reactants (ammonia or carbon dioxide) is a limiting reactant. Show calculations to support your choice C) Which of the two reactants should you use to calculate the theoretical yield (=the maximum amount possible) of urea. Explain why

Urea, chemical formula (NH2)2CO, is used for fertilizer and many other things. Calculate the number of...

Urea, chemical formula (NH2)2CO, is used for fertilizer and many other things. Calculate the number of N, C, O, and H atoms in 1.78 × 104 g of urea. Enter your answers in scientific notation.

1. Solid urea, (NH2)2CO, burns to give CO2,N2, and liquid H2O. Its heat of combustion is...

1. Solid urea, (NH2)2CO, burns to give CO2,N2, and liquid H2O. Its heat of combustion is -632.2 kJ/mol. Balance the equation for combustion of urea, and calculate the heat generated per mole of H2O formed. (Enter in kJ.) 1B.Using this heat of combustion and the appropriate thermodynamic data, determine the heat of formation of urea. (Enter in kJ.) 2. Given that the ΔHorxn = -2842.0 kJ, for the following reaction: 2C3H5(NO3)3(l) → 6CO2(g) + 1/2O2(g) + 3N2(g) + 5H2O(g) determine...

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How many grams of CaCl2 should be added to 50.0 g of water to make a solution in which the mole fraction of Cl1- is 0.150? ***I understand how this question should be set up, I am confused about a certain part of the set up. The correct set up is as follows: 0.150 = (2n mol Cl-)/ (3n mol ions + 2.78 mol of H2O) and solve for n; I do not understand why the ratio within the problem...

Calculate the amount of water (in grams) that must be added to (a) 9.00 g of...

Calculate the amount of water (in grams) that must be added to (a) 9.00 g of urea [(NH2)2CO] in the preparation of a 8.10 percent by mass solution: (b) 28.9 g of MgBr2 in the preparation of a 2.90 percent mass solution:

How many grams of TAPSO and sodium TAPSO must be added to 1.3 L of water...

How many grams of TAPSO and sodium TAPSO must be added to 1.3 L of water to produce a solution with pH 7.6 and a total solute concentration of 75 mM?

How many grams of ethylene glycol (C2H6O2) must be added to 1.20 kg of water to...

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How many grams of water at 25°C must be added to a Dewar flask (isolated system)...

How many grams of water at 25°C must be added to a Dewar flask (isolated system) containing 20 g of ice at -5°C to satisfy the conditions in (a) through (d)? Compute the entropy change in each case. Predict the sign of ΔS in each case before doing the calculation. a) The final temperature is -2°C; all the water freezes. b) The final temperature is 0°C; half the water freezes c) The final temperature is 0°C; half the ice melts...

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