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Sodium bicarbonate is often used as an antacid to neutralize excess hydrochloric acid in an upset stomach. How much hydrochloric acid in grams can be neutralized by 3.5 g of sodium bicarbonate?
How do the spacings of the energy levels of X and H compare, where X has one electron like the H atom but has different energy levels and for X: E = - (RH / n3) and RH is the same as H (2.179 ×10?18J)?
An aqueous solution with a pH of 9.87 is diluted from 1.0 L to 1.5 L. What is the pH of the diluted solution. 4.84 7.07 10.05 10.42 10.78
assume that while titration of vinegar sample with standard naoh takes place you misread the buret and the observed
One model of the hydrogen atom relies upon the idea that the electrons reside in stable orbits from which they can not deviate and are found outside of a small, densely packed group of protons. This model was created by
a student mixes 5.00 ml 2.00 x 10-3 m feno33 2.50 ml 2.00 x 10-3 m kscn and 2.50 ml h2o to give a solution having a
The equilibrium constant K(p) for the reaction: H2(g)+I2(g)-> 2HI(g) at this temperature is 54.3. Determine the equilibrium partial pressures of H2, I2, and HI
Consider all possible transitions from the initial state to the final state of the hydrogen atom described above. Calculate all possible values of the wavelength of the emitted radiation.
The reactant concentration in a second-order reaction was 0.410 M after 190s and 1.60×10^?2 M after 820s . What is the rate constant for this reaction
Silicon has been doped with 5 x 10^22 m^-3 of boron atoms. Calculate the conductivity of silicon at (a) room temperature (32 C) (b) at (125 C)
In a calorimetry experiment, 0.497 g of potassium hydroxide are dissolved in 25.o ml of water (density = 1.00 gml, specific heat = 4.184 j g-1 °c-1) in an insulated container. the temperature of the water rises from 21.37 °c to 26.25 °c.
The volume of 350. mL of gas at 25°C is decreased to 135 mL at constant pressure. What is the final temperature of the gas?
The recommended daily allowance (RDA) of calcium is 1200 mg. Calcium carbonate contains 12% calcium by mass. How many grams of calcium carbonate are needed to provide the RDA of calcium
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