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Reaction

Which of the following statement is true? a. A heterogenous catalyst is in a different phase from the reaction mixture b. Enzymes are protein molecules which catalyze reactions c. Catalysts are not consumed in reactions d. Answers a and b are true e. Answers a, b, and c are true

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

6654

OTA ID:

103144

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General Chemistry Help

Here is my question: A mystery compund X, composed of carbon, hydrogen, and oxygen combusts with oxygen gas in a sealed, steel cylinder to produce carbon dioxide and water gases. The temperature remains constatnt at 100 C throughout the reaction, and the cylinder has a volume of 1.50 L. The partial pressure of oxygen is initially 2.00 atm. After 0.500 seconds, oxygen's partial pressure drops to 1.86 atm; after 1.50 seconds, it drops to 1.63 atm. Half the original amount of X remains after 0.308 seconds, and 90.0 % of that is gone after an additional 1.020 seconds. Assume that the reaction finishes after 99.0% of X has reacted. It is found that the partial pressure of water changes by 0.1... click for more

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

6759

OTA ID:

103144

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acid base titrations and pH

Calculate the pH when 25.0 mL 0.20M HCl is titrated with 30.0mL of .20 M NH3 Kb(NH3)=1.8x10^-5

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

6767

OTA ID:

103144

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Calculating the concentration of hydrogen given the pH level.

A solution has a pH of 6.72. Calculate the concentration of hydrogen ions in the solution.

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

7243

OTA ID:

102792

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chemistry

How would you describe how to separate a mixture of oil, sand, and saltwater.

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

7371

OTA ID:

102901

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