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Describe how the enzyme assay could still be used accurately even if maltose is already present in the test solution prior to the enzyme assay?
Can the terms ‘mass' and ‘weight' be used interchangeably - explain. Complete the following questions about nuclear radiation.
Which one has a stronger hydrogen bonding HO-H...OH2 or HS-H....SH2 ("..." indicated the location of hydrogen bonding)? Why?
If the density of benzene is 0.8766 g/mL, calculate the volume of benzene in the drum. Be sure to consider the units and significant figures.
During lightning flashes nitrogen combines with oxygen in the atmosphere to form nitrogen monoxide, NO, which then reacts further with O2 further to produce nitrogen dioxide, NO2.
Zinc reacts with 100. mL of 6.00 M cold, aqueous sulferic acid through single replacement. How many grams of zinc sulferic are produced? How many liters of hydrogen gas would be realeased at STP?
The following reaction represents the decomposition of water: How many molecules of hydrogen are produced from the decomposition of 12.2g of water into its elements?
In an experiment, 23.4g of iron sulphide, FeS (s) are added to excess oxygen, and 16.5 grams of iron (III) oxide, Fe2O3(s) are produced. the balanced equation for the reaction is: Calculate the prec
How many quarts of pure antifreeze must be added to 6 quarts of a 10% antifreeze solution to obtain 60% antifreeze solution?
The total pressure on the surface of Titanis 1220 mmHg. The atmosphere consistsof 82 mol% N2, 12 mol% Ar, and 6.0 mol%Section 10.6of 82 mol% N2, 12 mol% Ar, and 6.0 mol%CH4. Calculate the partial pr
A solution of HCl in water conducts an electrical current, but a solution of HCl in hexane does not. Explain this behavior in terms of ionization and chemical bonding?
Write the equilibrium law for the reaction. Calculate the equilibrium constant for the reaction at this temperature.
While the level in the open end (connected to the manifold) was measured as 25.2 cm above the U-neck. What is the pressure, in torr, in the gas collection manifold?
What is the mode of reaction of an acid buffer. Make list of industrial applications of buffers with clear explanation.
At equilibrium, 2.15 moles of NH3 was present. Calculate the number of moles of nitrogen and hydrogen at equilibrium.
Calculate the percent composition of sodium in sodium chloride. Tom Yum soup contains 420 mg sodium and 30 mg potassium in each 200 g serve.
How many total isomers are possible for the compound [Co(C2O4)2(NH3)Cl]2-? Make sketches of these isomers. Indicate optical isomers and draw them as mirror images.
A small body was launched up an inclined plane set at an angle α = 15° against the horizontal. Find the coefficient of friction, if the time of the ascent of the body is η = 2.0 times
A student sets up two reactions. Reaction 1 uses 0.210mol/L of reactant, and Reaction 2 uses 0.550mol/L of reactant. How many times faster is Reaction 2 compared to Reaction 1? Express your answer a
In a laboratory, you determine that the density of a certain solid is5.23×10-6kg/mm3. Convert this density into kilograms per cubic meters.
If 2.0 g of lithium metal reacts with 3.0 L of chlorine gas at STP, what mass of lithium chloride is produced?
You mix 2.0 mL of 0.50 M Cu(NO3)2 with 5.0 mL of 0.50 M KI, and collect and dry the CuI precipitate. Calculate the following:
What is the system that is buffered? What is the pH of the system? What compounds are responsible for the buffered system? What benefit does being at this pH serve?
For the list of molecules below demonstrate the different ways of representing organic molecules.
Consider the hydrogenation of benzene to form cyclohexane C6H6(l) + 3H2(g)-->C6H12(l) Delta H for combustion to CO2(g) and/or H20(l) at 298 K for C6H12, C6H12 and H2 is -3270, -4000, and -286 kJ