One way of expressing the rate at which an enzyme can catalyze a reaction is to state its turnover number. The turnover number is the maximum number of substrate molecules that can be acted on by one molecule of enzyme per unit of time. The table gives the turnover number of four representative enzymes. Enzyme Ribonuclease Fumarase Lactate dehydrogenase Urease Substrate Turnover number (per second) RNA 100 fumarate 800 lactate 1000 urea 10,000 How many molecules of RNA can one molecule of ribonuclease act on in 14.9 min? RNA molecules:

State the meaning of neutralization reaction. Give two examples to illustrate your answer.

Major products of the reactants...

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Chemical Bonding -.. V Pennsylvania Acces... Department of Hu.. Bvlgari Man In Blac.. O CHEMICAL REACTIONS Identifying the limiting reactant in a drawing of a mixture The drawing below shows a mixture of molecules: key carbon hydrogen nitrogen sulfur oxygen chlorine Suppose the following chemical reaction can take place in this mixture: 2C,H,(g)+50,(g) → 4 CO,(g)+2H,O(g) Of which reactant are there the most initial moles? Enter its chemical formula: Of which reactant are there the least initial moles? Enter its chemical formula: Which reactant is the limiting reactant? Enter its chemical formula: Explanation Check

The standard concentration of a CdCl2 barium chloride solution containing 562 mg / liter is .......... Note that the atomic weights are: Cd: 112.41, Cl: 35.5,

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www-awn.aleks.com O MEASUREMENT Deducing the unit missing from the solution to a basic qu.. A student sets up and solves the following equation to solve a problem in solution stoichiometry Fill in the missing part of the student's equation. 1 kg (135D 103 1 mL 0.65 kg (0.48 L) 3 10 ? 1 X

What volume  (in mL) of 5.65 M HCl can be made by mixing 6.55 M HCl with 380 mL of 4.45 M HCl?   Hint: This is a mixing problem.

How would someone be confident in an experimentally determined concentration? Explain the reasoning using technical terms.