Based on the titration results, the adult would need to consume 85.7 mL to meet the recommended daily intake of 60 mg of Vitamin C. This is calculated from the average total volume of DCPIP used during trials.
d is your answer; I hope this assists you.
Context:
175 kilograms of methane (CH4) is to be converted into hydrogen cyanide (HCN)
The equation that balances this reaction is listed here:
2 CH4<span> + 2 NH</span>3<span> + 3 O</span>2<span> → 2 HCN + 6 H</span>2<span>O
</span>
To find the quantities of ammonia and oxygen needed, we will use 175 kg of CH4 as our reference.
Molar masses are as follows:
CH4 = 16 kg/kmol
NH3 = 17 kg/kmol
O2 = 32 kg/kmol
For ammonia: mass of NH3 = 175 kg CH4 / 16 kg/kmol * (2/2) * 17 kg/kmol
This results in 185.94 kg of NH3 required
For oxygen: mass of O2 = 175 kg CH4 / 16 kg/kmol * (3/2) * 32 kg/kmol
So the mass of O2 needed equals 525 kg
To derive the mass of oxygen: mass of O = 525 kg / 32 kg/kmol * (1/2) * 16 kg/kmol
This gives a mass of O equal to 131.25 kg O
Q=? kJ
m= 1.37 kg ×
= 1370 g
c= 4.18 J/g° C
ΔT= <span>89.5-21.3=
68.2˚C
</span>? J = (1370 g) (4.18 J/g˚C) <span>(68.2˚C)
</span>q = 390,554 J ×
q = 391 kJ
Response:
a. The return of the process fluid after it has been cooled, condensed, or heated in a distillation column or packing.
b. should remain stable at elevated temperatures
should not generate additional by-products
should be chemically inert
c. expressed as a range
d. determined by conducting a series of measurements
e. impurities cause substances to melt at lower temperatures.
Explanation:
a. In a reflux system, the condensate is returned to the initial flask or boiler. This keeps the process fluid at a constant temperature without needing more fuel while increasing the molar fraction of the distillate (which enhances product purity).
b. A solvent needs to be stable and should not participate in side reactions that produce unwanted by-products, ideally remaining inert at elevated temperatures.
c. It is advisable to report melting points as a range since various factors influence the melting point in experimental setups.
d. Melting points can be ascertained through a series of graphical measurements.
e. Impurities reduce the melting point of substances.
