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Use the following cell to answer the questions: Cr / Cr3+ (1.00 M) // Ni2+ (1.00 M) / Ni. a) How many milligrams of Ni would be plated on the cathode if a current of 0.20 A is drawn for 2.8 hrs? mg Ni b) What is [Cr3+] when [Ni2+] has dropped to 10-4 M? [Cr3+] = c) What is the cell potential at the conditions described in Part b? E = V
how many cans of Mountain Lightning would an individual have to drink to die from a tartrazine overdose If the LD50 of tartrazine in humans is supposed to be 12,750 mg/kg (as it is for mice) and the average human weighs 70 kilograms,?
A student heated a 4.901 g sample of hydrated iron chloride. After heating, the anhydrous iron chloride has a mass of 3.010 g. Calculate the percentage by mass of water in the hydrated compound.
Calculate the mass of a sample of iron (in kilograms) which contains the same number of atoms as 0.8118 L of mercury metal (density of mercury is 13.534 g/cm3).
The values for nitrous acid (HNO2) and hypochlorous (HClO) acid are 4.5 x 10^-4 and 3.0 x 10^-8 , respectively. Which one would be more suitable for use in a solution buffered at pH = 7.0
(The molecular formula for X is C8H8O2), and (The empirical formula for X is C4H4O) are all true. C) The empirical formula for X is C4H4O. D) The molecular formula for X is C8H8O2. E) X has a molecular mass of 136.
When square brackets are placed around the formula for a substance, such as [NaOH], it indicates that we are working with the percent-by-mass
During the Purification of Lactate Dehydrogenase (LDH) experiment, you will need 50ml of buffer A150. Buffer A150 is 30mM Tris (pH 8.8) and 150mM NaCl. Given 1L of 1.5M Tris and 500ml of 5M NaCl,
A chemist calculated the theoretical yield of a product to be 26.8 g. The percent yield was 92.2%. How many g of product were actually obtained
A 0.221 g sample of sodium carbonate was titrated to a pale yellow endpoint with HCl. What is the concentration of HCl
Which separation technique do you think will be fastest, flash chromatography or chromatotron. Explain.
C2H4 is emitted by fruits and is responsible for their ripening. Explain why a bunch of bananas ripen faster when placed in a paper bag.
Carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constanst (K) for this reaction (delta Gf values: H2CO3= - 616.1, H2O= - 237.1, CO2= - 394.4) .
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