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A student was performing an acid/base titration on a sample of vinegar using phenolphthalein as an indicator. She stopped the titration when her solution obtained a bright pink color. Would her calculated molarity of the vinegar be higher of lower than the true? Explain why.
These rays are categorized by wavelength. So-called UV-A radiation has wavelengths in the range of 320-380 nm, whereas UV-B radiation has wavelengths in the range of 290-320 nm. Calculate the frequency of light that has a wavelength of 320 nm.
calculate the molarity of a KCl solution made by disslving 52.5 g of KCl in 250 ml of water?
Calculate the pH of a solution resulting from the titration of 50mL of 0.04M HBr with 25 mL of 0.107M KOH. Give your answer to two decimal places
How many grams of of ethylene glycol are needed per kilogram of water to protect the radiator fluid against freezing down to -10C
Consider the titration of 25.0 mL of a 0.723 M HCl solution with a 0.273 M KOH solution. Calculate the hydrogen ion concentration before any titrant, KOH solution, is added.
Water is 11.2% hydrogen and 88.8% oxygen by weight. If 75.5 grams of hydrogen are produced by decomposing water, how many grams of water were decomposed and how many grams of oxygen were produced
Use Lewis Symbols to show the sharing of electrons between a silicon atom and hydrogen atoms to form a molecule in which silicon has an octet of electrons.
What factor determines whether a carbon atom in a compound is chiral? Draw the Lewis structure for each of the following functional groups: alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine.
A 0.1329 g sample of solid magnesiumis burned in a constant-volume bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter contains exactly 251 g of water, and the temperature increases by 1.126°C. Compute the heat given off by the..
The reaction 1 M + 2 N ? 1 P has a equilibrium constant, Kc, equal 9.16E-06 where E is the exponent on 10. The initial concentration of M is 0.34 M
Humans consume glucose, C6H12O6, to produce engery. the products of glucose consumption are CO2 and H2O. C6H12O6(s)+6O2(g)--->6CO2(g)+6H20(g)
If the yield of this reaction is 82% and aluminum ore is 71% by mass aluminum oxide, what mass of aluminum ore must be mined in order to produce 1.0 × 103 kg (1 metric ton) of aluminum metal by the Hall process
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