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When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3(s)+2HCl(aq) -> CaCl2(aq) +H2O(l) +CO2(g) How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate are combined with 12.0 g of hydrochloric acid? Which reactant is in excess and how many grams of this reactant will remain after the reaction is complete?
A certain reaction releases 10.1 kJ at constant volume and at constant pressure releases 8.4 kJ. What is the (delta)U for the reaction?
Suppose that the observed melting point range of a solid was originally 150-160 °C, but this became 145-145.5 °C after recrystallization. How might you account for this observation
Calculate the number of milliliters of stomach acid neutralized by 1 tablespoon of milk of magnesia (1 tablespoon = 3 teaspoons).
The element lanthanum has two stable isotopes, lanthanum-138 with an atomic mass of 137.9 amu and lanthanum-139 with an atomic mass of 138.9 amu
A titration is performed in which 50.0 mL of 0.0463 M acetic acid (Ka = 1.8 x10^- 5) is titrated with 0.1000 M NaOH. Calculate the pH at the beginning of the titration (Vb = 0).
How many milliliters of a 235 mL solution of 1.5 M AlCl3 must be used to make 61 mL of a solution that has a concentration of 0.5 M Al3+?
Write the decayreaction for this isotope and explain your prediction in terms of N/Zratio.
A solution contains 0.010 M silver ion and 0.0010 M lead(II). Sodium sulfate is dissolved to give a nominal concentration of 0.0010 M sulfate. Does a precipitate form?
A mixture of p-nitroaniline and o-nitroaniline is separated by column chromatography. which compound will be eluted first? Give reason.
A sample of Chlorine gas occupies a colume of 711 mL at pressure of 251 mmHg. Calculate the pressure of the gas (in mmHg) if the volume is reduced at constant temperature to 173 mL in scientific notation
The calorimeter contains exactly 321 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg, in kJ/g and in kJ/mol.
A common by-product in this reaction is biphenyl, which is generated through a coupling reaction of phenylmagnesium bromide with unreacted bromobenzene. Draw the structure of biphenyl. Which part of your workup removed this by-product
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