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How many grams of NH4Cl must be added to 0.490 L of 1.00 M NH3 solution to yield a buffer solution with a pH of 8.90?
Determine what percent by weight of sodium carbonate does it contain If the specific gravity of the sodium carbonate solution = 1.25,?
Calculate the volume of O2 at STP, required for the complete combustion of 175 g octane (C8H18) to CO2 and H2O?
A solution of iodine was standardized with ascorbic acid. A 0.1150 g sample of ascorbic acid required 28.37 mL of I2 to reach a starch end point. Calculate the molarity of the iodine solution.
A student was given a standard Fe(s) | Fe2+(aq) half-cell and another halfcell containing an unknown metal M immersed in 1 M MNO3(aq).
Which of the following has the smallest mass? a. 3.50 x 1023 molecules of I2
C3H8 + 5O2 reacts to yield 3CO2 + 4H2O +488 kJ What is the heat released if 2.5 moles of C3H8 reacts completely with oxygen?
barium metal crystallizes in a body-centered cubic lattic. The unit cell edge length is 502 pm, and the density of the metal is 3.50 g/cm3. Using this information.
Determine how many pills does the female require to take each time she wants the dosage of 375miliigrams?
What volume of oxygen gas at 25 degrees Celcius and 1.00 atm is produced from the decomposition of 22.33 mL of a 30.0% (by mass) solution of hydrogen peroxide?
An empty Erlenmeyer flask weighs 261.9 g. When filled with water (d = 1.00 g/cm3), the flask and its contents weigh 465.2 g. What is the flask's volume in cm^3?
Solving this question helps the student to understand what is happening in a chemical reaction and to balance the given equation.
which is commonly known as table sugar, reacts in dilute acid solutions to form two simpler sugars, glucose and fructose, both of which have the formula C6H12O6 At 23C
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