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Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). Calculate the change in pH when 7.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.
what is the limiting reagent and the volume of CO2 formed when 11 L s2 reacts with 18 L O2 to produce Co2 gas adn SO2 gas at STP
For the borax solution at 48?C, no solid borax is present in the test tube. 5 millimeters is transferred to the corresponding calibrated test tube and subsequently titrated with the standardized hydrochloric acid solution.
What will be the final temperature of a mixture made from equal masses of water at 24.1 C, ethanol at 37.3 C, and iron at 93.3 C? The specific heat capacities of each are: 0.449J/g C (Fe), 4.18J/g C(Water), and 2.42 J/g C (ethanol).
We use Use the De Broglie wavelength formula, ohr radius definition and wave-particle duality equation to compute the wavelength of,
Indicators can be used to estimate the pH value of soultions. To determine the pH of a 0.01M weak acid (HX), a few drops of three different indicators are added to separate portions of HX. The resulting colors of the HX solution are below.
Important information about pH and Molarity, You add 5 drops of .100 M HCl to 100ml of "pure" water. Assuming that the volume of one drop is .035ml, calculate the expected pH of the resulting solution
An element has three naturally occurring isotopes with the following masses and abundances (in parenthesis): 27.977 amu (0.9222); 28.974 amu (0.0469); 29.974 amu (0.0310). Calculate the atomic weight of the element.
If 77.0 mL of hydrogen gas is collected over water at 50.0 degrees celsuis and 763 mm Hg, what is the volume of dry gas at standard conditions? The vapor pressure of water is 92.5mm Hg at 50.0 degrees celsuis .
Using a liquid sample of Na that has a molar heat of fusion of 2.06 kj/mol calculate the number of moles in a liquid sample of Na if sample releases 41.4 kj when it freezes?
Suppose that an excess of propane, C3H8 burns in 320 g of O2. How many moles of H2O will be formed
How many milliliters (mL) of a 1.28 M sulfuric acid solution are needed to neutralize 60.2 mL of a 0.427M sodium hydroxide solution.
Determine the percent yield for the reaction between 45.9g of NaBr and excess chlorine gas to produce 12.8g of NaCl and an unknown quantity of bromine gas.
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