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Baking powder consists of a mixture of baking soda and a substance such as cream of tartar. Baking soda is sodium hydrogen carbonate, NaHCO3. In the production of carbon dioxide gas, baking powder acts very differently from baking soda. When water is added to baking soda, it just dissolves. When water is added to baking powder, carbon dioxide gas is produced. What is the purpose of cream of tartar in baking powder?
What is the mole fraction of ethanol, CH3CH2OH, in an aqueous solution that is 20.0% ethanol by mass?
Between 0 degrees Celsius and and 30 degrees Celsius, mercury has a specific heat of 0.138 J/g*C. If 200 J of heat are removed from 100 g of Hg at 20 degrees Celsius, what will the final temperature of the Hg be
Calculate the pH at the following points a. Before Titration b. After the addition of 5.00mL of NaOH c. After the addition of 25.00mL of NaOH d. After the addition of 50.00mL of NaOH e. After the addition of 5.00mL of NaOH
Galvanized nails are iron nails that have been plated with zinc toprevent rusting. The relevant reaction is For a large batch of nails, a manufacturer needs to plate a totalzinc mass of 1.70 on the surface to get adequatecoverage.
A 2.00 L sample of air at -50 degreees C has a pressure of 700 torr. What will be the new pressure in torr if the temp is raised to 50 degrees C and volume is increaed to 4.00 L
What volumes of 0.150 M acetic acid and 0.065 M NaOH solutions must be mixed to prepare 1.00L of a buffer solution of pH 4.50 at 25C.(Show all work for 5 stars)
a gas diffuses only .5 times as fast as an oxygen molecule at the same temperature. what is the molecular weight of the gas?
Given the following set of reations and their associated heats of reactions calculate delta H for the following reaction: 2NH3(g) + 3N2O(g)
How many different tetrapeptides containing 2 molecules of alanine and 2 molecules of valine could theoretically exist?
what is the ph change of a 0.270m solution of citric acid pka 4.77 if citrate is added to a concentration of 0.145m
the solubility of the k3fec2o43.3h2o product at 00c is 4.7 g per 100 g water. given this calculate the maximum percent
Calculate the cell potential for the following reaction as written at 59 °C, given that [Zn2 ] = 0.874 M and [Sn2 ] = 0.0170 M. Standard reduction potentials can be found here.
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