CHEMISTRY HIGH SCHOOL

Unlabeled atoms joined to carbon atoms, which are not directly part of a ring structure, are assumed to be oxygen atoms.

Answers

Answer 1
Answer: The statement above is FALSE.
Unlabeled atom joined to carbon atoms which are not directly part of a ring structure are assumed to be CARBON ATOMS. In a ring structure, an unlabeled atom at the angle where two lines joined together is always assumed to be a carbon atom

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MIDDLE SCHOOL

What is the coefficient for potassium in the balanced equation

Answers

Answer:

Na2S

Explanation:

COLLEGE

List all of the metabolic pathways/processes that apply to each of the statements below (choose from: Glycolysis, Lactate Fermentation, Pyruvate Oxidation, Citric Acid Cycle, Electron Transport Chain & ATP Synthase, Beta Oxidation). For each statement, there may be no correct answer, only one correct answer, or more than one correct answer. A. Generates oxidized electron carriers B. Takes place in the absence of oxygen

Answers

Answer:

A  electron transport chain and ATP synthase B glycolysis,Lactate fermentation.

Explanation:

A  Electron transport chain and ATP synthase helps in the generation of oxidized electron carriers because during electron transport chain the reducing equivalents such as NADH and FADH2 donates electron along with proton to become oxidized to form NAD+ and FAD.

B Glycolysis and lactate fermentation occur in absence of oxygen during anaerobic respiration.

MIDDLE SCHOOL

Which statement best describes the energy of activation?

Answers

Answer:

Explanation:

it is more quickly overcome when the temperature increases

activation energy start off chemical reaction

HIGH SCHOOL

The rate of disappearance of HCl was measured for the following reaction: CH3OH(aq)+HCl(aq)→CH3Cl(aq)+H2O(l)

The following data were collected:

Time (min) [HCl] (M)
0.0 1.85
54.0 1.58
107.0 1.36
215.0 1.02
430.0 0.580(a) Calculate the average rate of reaction, in M/s, for the time interval between each measurement. (b) Calculate the average rate of reaction for the entire time for the data from t=0.0min to t=430.0min. (c) Which is greater, the average rate between t=54.0 and t=215.0min, or between t=107.0 and t=430.0min

Answers

Answer: (a)  0.000083M/s,  0.000069M/s, 0.000052M/s,  0.000034M/s

(b) average reaction rate between t=0.0min to t=430.0min =0.000049M/s

(c) The average rate between t=54.0 and t=215.0min is greater than the average rate between t=107.0 and t=430.0min

Explanation:

Average reaction rate = change in concentration / time taken

(a) after 54mins, t = 54*60s = 3240s

average reaction rate = (1.58 - 1.85)M / (3240 * 0.0)s

= -0.27M/3240

= 0.000083M/s

after 107mins, t = 107*60s = 6420s

average reaction rate = (1.36 - 1.58)M/ (6420 - 3240)s

= -0.22M/3180s

= 0.000069M/s

after 215mins, t = 215*60s = 12900s

average reaction rate = (1.02 - 1.36)M/ (12900 - 6420)s

= -0.34M/6480s

= 0.000052M/s

after 430mins,t = 430*60 = 25800s

average reaction rate = (0.580 - 1.02)M / (25800 - 12900)s

= -0.44M/12900s

= 0.000034M/s

(b) average reaction rate between t=0.0min to t=430.0min

= (0.580 - 1.85)M/ (25800 - 0.0)s

= -1.27M/25800s

=0.000049M/s

(c) average reaction rate between t = 54.0min and t = 215.0min

= (1.02 - 1.58)M / (12900 - 3240)s

= -0.56M/9660s

= 0.000058M/s

average reaction rate between t=107.0 and t=430.0min

= (0.580 - 1.36)M / (25800 - 6420)s

= 0.78M /19380s

= 0.000040M/s

Therefore the average rate between t=54.0 and t=215.0min is greater than the average rate between t=107.0 and t=430.0min

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