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krok68 [10]
3 years ago
9

Billions of pounds of urea are produced annually for use as a fertilizer. Balance the skeletal equation for the synthesis of ure

a. Express your answer as a chemical equation. Identify all of the phases in your answer.
NH3(g)+CO2(g)==>CO(NH2)2(s)+H20(l)
Chemistry
1 answer:
klio [65]3 years ago
5 0
2NH₃(g) + CO₂(g) → CO(NH₂)₂(s) + H₂O(l)
is the balanced equation for the synthesis of urea.
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Calculate the change in pH of a 1.00 L of a buffered solution preparing by mixing 0.50 M acetic acid (Ka = 1.8 x 10^-5) and 0.50
tankabanditka [31]

The change in pH of a 1.00 L of a buffered solution preparing by mixing 0.50 M acetic acid (Ka = 1.8 x 10^-5) and 0.50 M sodium acetate when 0.010 mole of NaOH is added is 4.75

when the same amount 0.010 mole of NaOH was added to 1.00 L of water the pH = 12

Explanation:

given that:

concentration of acetic acid = 0.50 M

Concentration of base sodium acetate = 0.50 M

ka = 1.8 x 10^-5)

pka = -log [ka]

pka = 4.74

From Henderson-Hasselbalch Equation:

pH = pKa + log \frac{[base]}{[acid]}

pH = 4.74 + Log \frac{[0.5]}{[0.5]}

pH = 4.74 + 0

pH = 4.74

Number of moles of NaOH = 0.010 moles

volume 1 litre

molarity = 0.010 M

Moles of acetic acid and sodium acetate before addition of NaOH

FORMULA USED:

molarity = \frac{number of moles}{volume in litres}

acetic acid,

0.5 = number of moles

0.5 is the number of moles of sodium acetate.

number of moles of NaOH  0.010 moles

NaOH reacts in 1:1 molar ratio with acetic acid so

number of moles in acetic acid = 0.5 - 0.010 = 0.49

number of moles in sodium acetate = 0.5 +0.010 = 0.51

new pH

pH = pKa + log \frac{[base]}{[acid]}

pH= 4.74 + log[0.51] - log[0.49]

pH= 4.75

PH of NaOH of 0.01 M (BASE)

pOH = -Log[0.01]

pOH         = 2

pH can be calculated as

14= pH +pOH

pH= 14-2

pH = 12

           

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erik [133]

Answer:

Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and a rubber ball dropped together. Air resistance causes the feather to fall more slowly, while the ball falls more fast.

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Density can be calculated by dividing an object's mass by its volume. If the mass of an object is 10 grams and its volume is 2 m
Luden [163]

Explanation:

  1. mass =10g. volume=2ml. density=mass/volume = 10/2=5kg/m^3
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