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Nata [24]
3 years ago
13

Which of the following is a valid pair representing STP?

Chemistry
1 answer:
KiRa [710]3 years ago
7 0

Answer:

Option C. 760mmHg & 0°C

Explanation:

The standard pressure = 760mmHg = 1atm = 760torr = 101325N/m2

= 101325Pa

Standard temperature = 0°C =273K

From the above, the right combination is 760mmHg and 0°C

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Glucose (C6H12O6) can be fermented to yield ethanol (CH3CH2OH) and carbon dioxide (CO2). C6H12O6⟶2CH3CH2OH+2CO2 The molar mass o
jekas [21]

Answer:

The % yield is 74.45 %

Explanation:

<u>Step 1:</u> The balanced equation

C6H12O6⟶2CH3CH2OH+2CO2

<u>Step 2</u>: Data given

Molar mass glucose = 180.15 g/mol

Molar mass of ethanol = 46.08 g/mol

Molar mass of carbon dioxide = 44.01 g/mol

Mass of glucose = 61.5 grams

Mass of ethanol = 23.4 grams

<u>Step 3:</u> Calculate moles of glucose

Moles glucose = Mass glucose  / Molar mass of glucose

Moles glucose = 61.5 grams / 180.15 g/mol

Moles glucose = 0.341 moles

<u>Step 4:</u> Calculate moles of ethanol

1 mole of glucose consumed, produces 2 moles of ethanol and 2 moles of CO2

0.341 moles of glucose, will produce 2*0.341 = 0.682 moles of ethanol

<u>Step 5:</u> Calculate mass of ethanol

Mass ethanol = moles ethanol * Molar mass ethanol

Mass ethanol = 0.682 moles * 46.08 g/mol

Mass ethanol = 31.43 grams = theoretical mass

<u>Step 6:</u> Calculate % yield

% yield = actual mass / theoretical mass

% yield = (23.4 grams / 31.43 grams) * 100%

% yield = 74.45 %

The % yield is 74.45 %

7 0
3 years ago
Name the method that used to separated <br><br> amino acids from fruit juice solution
Ket [755]
Using the method chromatography
8 0
3 years ago
What is the major divide or ridgeline that separate Virginia's watersheds?
rewona [7]
In Virginia, the continental divide separates the New River from the Roanoake and James River. East of the continental divide, the rivers flow east or south toward the Atlantic Ocean. West of the continental divide, the rivers flow north or west toward the Gulf of Mexico by way of the Ohio and the Mississippi Rivers.
6 0
3 years ago
The pictures below show water in a glass and oil in a beaker.
Archy [21]

Answer: is letter D. Because minerals are solid.

Explanation:

3 0
3 years ago
Read 2 more answers
If 0.4506 g of KHP standard were titrated with NaOH and the endpoint was reached at 27.96 mL, what is the concentration (molarit
Lemur [1.5K]
Answer is in attachment.

Enjoy :)

6 0
2 years ago
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