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40.0L of H2 at 850mmHg and 75.5 degrees celsius is reacted with an excess of I2. What mass of HI is formed? H2(g) + I2(g)--> 2HI(g)
The effective nuclear charge tends to decrease from left to right across any period of the periodic table. 3.Electrons in the 2s orbital feel a greater attraction to the nucleus than the 2p electron
Consider the reaction at 25C 2NO2 --> 2NO + O2 The overall rxn rate = k[NO2]2. The rate constant, k = 1.4 × 10?10 M?1 s?1. If 3.8 moles of NO2 are initially present in a sealed 1.00 liter
what is the final temperature of the block after the evaporation of the alcohol. Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block
What is the volume (L) of a sample of gas when 4.50 grams of H20(g) and 35.0g of Xe(g) at 650mmHg are mixed at 200 degrees celsius
The rate constant for the equation 2C2F4 --> C4F8 is 0.0438 M?1· s?1. We start with 0.142 mol C2F4 in a 5.00-liter container, with no C4F8 initially present. What will be the concentration
Calculate Keq for 3 moles of electron(s) in each half-reaction and a standard potential of 0.47 V.
A vitamin C containin sample was titrated to the blue colored endpoint with 19 ml of 0.12 M iodine solution. How many grams of Vitamin C were in the sample
A half-cell that consists of a copper wire in 1.00 M CuNO3 solution is connected by a salt bridge to a half cell containing a 1.00 M X(II) acetate solution and an electrode of metal X. The voltage o
Calculate the concentration of all the species, ions, and molecules, and the pH of the following solutions. All solutions have a total volume
The total pressure of 75.0g Ar and 75.0g Rn is 2.30atm. What is the partial pressure (in atm) of Rn?
What molarities of HBrO (pKa 8.64) and KBrO are needed to make a buffer with a pH of 7.9 if the buffer strength is 0.35 M? What volumes are needed if both species are available in 5.0 M stock soluti
A solution made by adding solid sodium hypochlorite (NaClO) to enough water to make 2.00 L of solution has a pH of 10.50. Calculate the number of moles of NaClO that was added.
How would you make a buffer with a volume of 2.0 L, pH of 5.0 and a strength of 0.25 M using 5.0 M acetic acid stock solution (Ka = 1.8x10-5) and sodium acetate ( NaO2C2H3 available as a solid salt
Sorbic acid is a weak monoprotic acid with Ka = 1.7x10-5. Its acid anion salt (potassium sorbate FW = 150 g/mole) is added to cheese to prevent mold. What is the pH of a solution that contains 4.93
The acid dissociation constant for hypochlorous acid (HClO) is 3.0x10-8. Calculate the concentrations of H3O+, ClO- and HClO at equilibrium if the initial concentration of the acid is 0.05 M. What i
Predict whether the following solutions will be acidic basic or nearly neutral a) NH4l b) NaNO2 c) FeCl3 d) NH4F, where NH4+ is Ka=5.6 x 10^10; F is Kb= 1.4 x 10^-11
Glycerol esterified with three fatty acids is called a sphingolipid d. Waxes are esters of long-chain alcohol and long-chain fatty acid e the short hand notation for fatty acid
Calculate the acid dissociation constant Ka, for the ammonium ion (NH^4+); Kb for NH3 is 1.8 x 10^-5
What is the pressure (mmHg) if 800 kPa is increased in volume from 1.75L to 3.0L and the temperature is increased from 65degrees Celsius to 100degrees Celsius
The following reaction is initiated and the concentrations are measured after ten minutes: A(g) + 3 B(g) AB3(g); Kc = 1.33 x 10-2 [A] = 1.78 M [B] = 2.21 M [AB3] = 1.19 M Is the reaction in equilibr
The equilibrium constant for the following gas phase reaction is 0.50 at 600°C. A mixture of HCHO, H2, and CO is introduced into a flask at 600°C.
determine the bond angles of BF3 and CH2O and comment on why the angles are different.
Which of the following statements about the reaction quotient, Q is false. A) The value of Q can be used to predict equilibrium concentrations B) It has the same expression as Kc
Write the lewis formula for the reactant and product species in the following chemical equation. Include nonbonding electrons. 2OH yields H2O2.