Enzymes/III

Which of the designations listed below does not correspond to a major class of enzymes as outlined by the International Union of Biochemistry? a.Hydrolases b.Transferases c.Carboxy lases d.Isomerases A particular oxidoreductase requires F AD as an essential component for its activity. The complete biological unit req ...continues

Understanding volume

If I have the mass total and I'm trying to find the volume of one of the items that makes up the total mass? D=M/V

Its about acid and base equilibrium.

A 0.1mol/L aqueous solution of weak monoprotic acid (contains one ionizable hydrogen atom) has a hydrogen ion concentration of 0.001mol/L. The value of the ionization,Ka, for this acid is a) 10^-6 (10 to the power of -6) b) 10^-2 (10 to the power of -2) Ps: I don't know what they are asking for, please show me the work s ...continues

Heat reaction, activation energy, diagram

FOR THE REACTION CO + NO2 ------>CO2 + NO The activation energy for the forward reaction is 135 kj/mol of CO reacted. A) Determine the heat of reaction. B) From the data given and the enthalpy of reaction, determine the activation energy for the reverse reaction. C) Draw and label a potentia ...continues

AP Chemistry Problem

1: Consider mixing solutions of silver nitrate and calcium chloride. a. write a net ionic equation for the formation of the precipitate. b. If 200.0 mL of .300 M silver nitrate are mixed with 350.0 ml of .500 M calcium chloride, how many grams of precipitate are formed? How many moles of each ions are present after orecip ...continues

AP Chemistry

Question 3: The salt NaBrO(3) oxides Sn^2+ to SnCl(6)^2- in the presence of hydrochloric acid according to the equation 3 Sn^2+ (aq) + 18 Cl^- (aq)+ BrO(3)^- (aq) + 6 H^+ (aq) -> 3 SnCl(6)^2- (aq) + Br^- (aq) + 3 H(2)O A sample weighing 2.000g is ...continues

AP Chemistry

Consider two solutions. One solution is 0.1115 M Ca(OH)(2). The other is 0.1050 M HClO(4). a) Write a balanced equation for the reaction between the two solutions. b) How many mL of Ca(OH)(2) will be required to neutralize 25.00 mL of the HClO(4)? c) If a student starts to titrate 31.39 mL of the Ca(OH)(2) solut ...continues

AP Chemistry

Balance the following equations: a. S(2)O(3)^2- (aq)+I(3)^- (aq) ->S(4)O(6)^2- (aq) + I^- (aq) b. Mn^2+(aq) + HBiO(3) (s) ->MnO(4)^- (aq) + Bio^+ (aq) (acid) c. Cr(2)O(7)^2- (aq) + H(3)AsO(3) -> H(3)AsO(4) (aq) + Cr^3+ (aq) (acid) d. CIO^1(aq) + Cro(2)^- (aq) ->Cl^- (aq) + CrO(4)^2- (aq) (Basic) e. Obr^- (aq) +HPO(3)^2- ( ...continues

AP Chemistry - Consider the element Zinc (Zn)

Consider the element Zinc (Zn). a. If Zinc was designed to have an atomic mass of 100.0amu, what would the atomic mass of Si be? b. How many atoms would there be in 1.00g of Zinc? How many moles are there in 3048g of Zinc? What is the mass of two million atoms of Zinc? c. Zinc has two isotopes. Zn-64 has an atomic mass ...continues

AP Chemistry - cyclohexane

2. Consider the molecule cyclohexane, which contains only hydrogen and carbon atoms. a) When a sample is burned in oxygen, 4.822 g of CO(2) and 1.650g of H(2)O are obtained. What is its simplest formula? b) Calculate the mass percent of carbon and hydrogen in cyclohexene. c) How many grams of carbon would you obtain fro ...continues