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Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts u'ith essential enzymes-leading to irreversible inactivity of these enzymes. If the affiount of mercury in a poiluted lake,is 0.4 pg1gtpr,what is the total mass in kilograms of mercury in the lake? (The lake has a surface area of 100 miles2 and an average depth of 20 ft')
In one episode of the 1960s television sitcom, Gilligan's Island, the famous professor constructed voltaic cells to use as substitues for their radio's dead batteries.
a current of 2.40 a is passed through a solution containing cu2aq for 30.0 minutes with copper metal being deposited at
when an irregularly shaped chunk of silicon weighing 8.763 g was placed in a graduated cylinder containing 25.00 ml of
Dissolving 3.00 g of an impure sample of CaCO3 in an excess of HCl acid produced .656 L of CO2 (measured at 20 degrees C and 792 mmHg). calculate the percent by mass of calcium carbonate in the sample. State any assumptions.
what mass spectrometry techniw would be most effective in determining the chemical structure?
What is the temperature of .49 mol of gas at a pressure of 1.2 atm and a volume of 12.4 L? 2. A weather balloon is inflated to a volume of 26.1 L at a pressure of 755 mmHg and a temperature of 23.0. C The balloon rises in the atmosphere to an alti..
The procedure uses 3.0M NaOH. However, the student notices that the only solution of NaOH is concentrated (19M ) NaOH solution. How many mL of water are needed to make 500mL of a 3.0M NaOH
Calculate the mass of zinc iodide formed when you have 1.o grams of zinc metal and 1.0 grams of iodide crystals
Unfortunately, a mixup in the laboratory prevented an immediate analysis, and it was not until 17.0 days later that a measurement on the blood was made.
If 12800 calories is required to change 45g of substance X from a liquid to a gas, what is the heat of vaporization of substance X?
Write a balanced molecular equation for the thermal decomposition of potassium perchlorate. What is the % of KClO4 in the sample being heated
How many moles of table salt (NaCl) are in a box that has 117 grams of salt? (atomic mass of Na = 23.0; atomic mass of Cl = 35.4)
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