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1. The element bromine was first prepared by oxidation of aqueous potassium bromide with solid manganese(IV) oxide. Write a balanced net ionic equation for the reaction in aqueous acidic solution. (Mn2+ is also formed)
2. The first preparation of chlorine was similar to the synthesis of elemental bromine (Problem no.1). A later method entailed the reaction of hydrogen chlorine and oxygen at 400 celcius. Write a balanced equation for the reaction. (Water is also formed)
Draw the conj acid of this base and use its structure to explain why it is so basic (resonance forms may help). The pKa of the conj acid is about 26. What is the pKb of the free base?
A patient weighs 165 pounds and is to receive a drug at a dosage of 45.0 mg per kg of body weight. The drug is supplied as a solution that contains 25 mg of drug per mL of solution. How many mL of the drug should the patient receive?
The normal respiratory rate for a human being is 25.0 breaths per minute. The average volume of air for each breath is 505 cm3 at 20.0 degrees Celsius and 9.95 times ten to the fourth Pa.
Determine the osmotic pressure of a solution that contains 0.042 g of a hydrocarbon solute (molar mass = 340 g/mol) dissolved in benzene to make a 350-mL solution. The temperature is 20.0°C.
Consider the following reactions and select the false statement below. CO2(g) + OH?(aq) ? HCO3?(aq) Cr3+(aq) + 6H2O(l) ? Cr(H2O)63+(aq) A. in Cr(H2O)63+ the Cr3+ is attracted to the H2O molecules via ion-dipole intermolecular forces
If 3.50ml of vinegar needs 42.0ml of 0.130M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.20qt sample of this vinegar?
4NH3 + 5O2 yields 4NO + 6H2O Given 1.50g of NH3 reacts with 2.75g of O2 which is the limiting reactant?
What is the [H3O+] of a solution that is 0.0100 M in HOCl
Impure benzoic acid was dissolved in hot water. the container of solution was placed in ice-water bath instead of being allowed to cool slowly.
Question about Aromatic Compounds, Explain the following: a.) The cycloheptatrienyl anion is antiaromatic, whereas the cyclononatetraenyl anion is planar (in spite of the angle stain involved)
The reactant concentration in a first-order reaction was 6.80×10-2 M after 10.0 s and 4.40×10-3 M after 65.0s . What is the rate constant for this reaction?
A solution is made by mixing 41.0 mL of ethanol, C2H6O, and 59.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C?
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