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A 35.0 mL sample of 0.150 M acetic acid (CH3COOH) is titrated with 0.150 M NaOH solution. Calculate the pH after the following volumes of base have been added.
0 mL17.5 mL34.5 mL35.0 mL35.5 mL50.0 mL
Draw a diagram showing the stratification in a body of water. Label the different layers and describe the type of chemistry (and species) that occurs at each level.
Understanding of chemistry basics - which of the following is not changed by the activity of an enzyme during a chemical reaction?
Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more complicated, but this is a reasonable first approximation.)
Suppose that the microwave radiation has a wavelength of 13.2 cm. How many photons are required to heat 200. mL of coffee from 23°C to 62°C?
C7H6O3 + CH3OH --> C8H8O3 + H2O In an experiment 1.50 g of salicylic acid (C7H6O3) is reacted with 11.20 g of methanol (CH3OH).
A 15.6 mL sample of vinegar, containing acetic acid, HC2H3O2, was titrated using 0.6216 M NaOH solution. The titration required 19.80 mL of the base. Assuming the density of the vinegar to be 1.0 g/mL, what was the percent (by mass) of acetic acid..
On the basis of your knowledge of bonding in liquids and solids, arrange the following substances in order of highest to lowest melting temperature: NaCl, Na, Cl2, SiO2.
1)WhenH2(g)reacts withC2H4(g)to formC2H6(g),137kJ of energy areevolvedfor each mole ofH2(g)that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.
What is the value of x in the formula for the hydrate? (hint: remember that x represents the ratio of moles of H2O to moles of hydrate compound, and that moles of hydrate compound equals the moles of anhydrous compound)
Explain how to correct for the partial of water vapor when calculating the partial pressure of a dry gas is collected over water?
what is the proper technique to measure the temperature of a liquid in a beaker with a thermometer?
Calculate the concentration of magnesium and calcium in ppm. Record your answers as ppm Mg2+, and Ca2+ espectively. For each answer indicate the ppm as CaCO3 also.
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