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Explain how bacteria are intimately involved in the generation of acidic mine waters.
element z has two isotopes: one has mass number of 19.0 amu is 55.0% abundant,and the isotope with mass number 21.0 amu is 45.0% abundant. what is the average atomic mass for element Z?
The corrosion of iron can be thought of as an electrochemical cell reaction. Calculate the voltage difference between two points of corroding iron differing only in their partial pressure of oxygen: 0.20atm of oxygen at one point and 0.0010atm of ..
Sodium bicarbonate is often used as an antacid to neutralize excess hydrochloric acid in an upset stomach. What mass of hydrochloric acid (in grams) can be neutralized by 2.3g of sodium bicarbonate?
Draw the product that is formed when 1-pentyne is treated with an excess of hydrogen gas and a nickel catalyst
Determine how many grams of the following solutes would be needed to make 550 mL of a 0.700 M solution.
An aqueous solution of KI has a freezing point of -1.95 C and an osmotic pressure of 25.0 atm at 25 C. Assumong that KI completely dissociaes in water, what is the density of the solution
if 2000 l of hard water contains 0.022 m ca2+ and 0.0070 m mg2+, how many moles of na+ are needed to replace these ions?
Utilizing the integrated form of the Gibbs-Helmholtz equation compute the Gibbs energy of vaporization of elemental mercury at a temperature of 213 C and a pressure of 1.00bar. Note- Presume the enthalpy of vaporization is constant between 25 C an..
when heated to a high temperature cyclobutane c4h8 decomposes to ethylene.c4h8g 2 c2h4gthe activation energy ea for
If equal amounts of I2 and cyclopentene are mixed at 1 bar and 500k, what will be the equilibrium partial pressure of I2. Kp=7.76x 10^-3
How many grams of 97% pure NaOH pellets do you need to make 1.000 liter of 1.5 NaOH
Find the pH and volume (mL) of 0.447 M HNO3 needed to reach the equivalence point(s) in the following titration. 0.188 L of 0.550 M NH3. 231L or 231mL is the about of HNO3 needed to reach equivalence, but I can not sort the pH.
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