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The zinc within a copper-plated penny will dissolve in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can get to the zinc). The reaction between the acid and the zinc is:
Zn (s) + 2 HCl (aq) ZnCl2 (aq) + H2 (g)
When the zinc in a certain penny dissolves, the total volume of gas collected over water at 25.0 °C was 0.951 L at a total pressure of 748 mmHg. What mass of hydrogen gas was collected?
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.
Draw the Lewis dot structure of CNNO2 along with all possible resonance structures, labeling formal charges.
what is the major organic product when cyclobenzene reacts with 1-chloro-2-methyl-5-ethylcyclohexane in the presence of AlCl3. please provide drawing of final structure
Water has a heat opf vaporization of 40.7 kJ/mol and a specific heat of 4.18 J/grams degrees celsius. How many Joules of heat are required to boil a cup of tea?
A pure silver ring contains 2.80 x 10^22 silver atoms. How many silver atoms does it contain. Please show your steps and solutions.
Calculate the pH after 10.0, 20.0, 30.0, and 40.0 ml of 0.100M NaOH have been added to 40.0ml of 0.100M HClO.
From the images of the structure of benzil, if the ketone groups are facing opposite directions, you get a net 0 diploe moment because they cancel. But if you have a cis molecule, then they both face the same direction.
Which will experience the greater effective nuclear charge, the electrons in the n=3 shell in Ar or the n=3 shell in Kr? Which will be closer to the nucleus?
How much heat (in kJ ) is required to warm 13.0 of ice, initially at -13.0, to steam at 114.0? The heat capacity of ice is 2.09 and that of steam is 2.01
Draw the structural formula for ethanol, 2-propanol and 2-methyl2-propanol. Write the reaction between sodium bicarbonate and benzoic acid.
A photon having E = 46.9 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon
An unknown compound X, is thought to have a carboxyl group with a pka of 2.0 and another ionizable group with a pka between 5 and 8. When 75 ml of 0.1 M NaOH was added to 100 ml of a 0.1 m solution of X at pH 2.0, the pH increased to 6.72.
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