sweet candy

solution containing potassium iodide, sodium thiosulfate, and starch. The reaction begins colourless but at a certain point the free triiodide concentration builds up, complexing with the starch molecules and producing a dark blue to almost black colour almost instantaneously.

Which of the following options will cause the blue colour to appear faster?

Increasing temperature

Increasing pH

Increasing starch concentration

Decreasing temperature

Increasing thiosulfate concentration

Non-competitive inhibition

pH inhibition

Temperature inhibition

Competitive inhibition

Allosteric inhibition

An oscillating reaction violates the second law of thermodynamics

An oscillating reaction must always have its oscillations cease eventually.

An oscillating reaction in an open system can allow for the indefinite maintenance of oscillations

An oscillating reaction in a closed system can allow for the indefinite maintenance of oscillations

A reaction far from equilibrium can experience periodic oscillations in the concentrations of intermediate species

Potential energy surfaces are capable of depicting local and global energy minima.

A late barrier reaction transition state resembles the reactants more than the products.

Frequencies of vibrational motion can be obtained from potential energy surfaces.

Transition states generally have long lifetimes on the order of milliseconds.

An early barrier reaction transition state resembles the reactants more than the products.

Promoting ostwald ripening of catalyst

Intoduce strongly binding species to catalyst

Increase catalyst surface area

Add large amounts of catalyst

Introduced catalytic promoter

the presence of platinum?

1 CO binds weakly to platinum

2 CO binds moderately to platinum

3 CO binds strongly to platinum

4 Co doesn't bind to platinum

5 CO volatilizes platinum

reactant concentration of 7.000 M

Collision frequency

Half-Life

Rate constant

Reaction time

Kinetics

The step with the highest gibbs free energy is the rate determining step

The step with the lowest gibbs free energy is the rate determining step

The rate determining step is the slowest step

The step with the highest activation barrier is the rate determining step

The step with the lowest entropy is the rate determining step

Addition of catalysts

Temperature increases

Temperature decreases

Addition of enzymatic inhibitors

Addition of enzymes

biophysical chemistry textbook. 14C dating shows that the 14C content has decayed to 90.045% of the atmospheric value. Determine the year the book was printed given a 14C half life of 5770 years

water

M s-1

s-1

M-1 s-1

M-2 s-1

M-3 s-1

phenomenon?

The amount of hydration of the protein doubles

The frictional coefficent of the protein doubles but the molecular weight is constant

The protein changes from an oblate ellipsoid to an prolate ellipsoid of the same axial ratio with nothing else changing

The charge on the protein doubles, but nothing else changes.

The electric field strength doubles but nothing else changes

Gas molecules can travel at hundreds of meters per second. Why does an unfortunate individual in this hall not detect the smell almost instantaneously?

1) Only a small fraction of the gas molecules move at hundreds of meters per second, too few to be detected immediately.

2) Dispersion interactions with other gas molecules slow them down substantially

3)The gas is denser than air and thus remains low on the ground where it isn't being detected.

4) Collisions with other gas molecules make the scent molecules movement erratic and inefficent

5)The scent molecules react with trace ozone in the air, only being detected once all the ozone in the immediate vicinity has been reacted with.

Ag/Ag+ half-cell is +0.8V and Zn/Zn2+ is -0.76V.

city should we choose? NYC, Boston, or chicago?

do I have to add to 1 L of water in order to be able to boil eggs at 100°C?