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In an equation for neutralization reaction that forms an aqueous solution of calcuim nitrate, the reactantsmight be
All numerical answers must be reported to the correct number of significant figures. A piece of mineral believed to be galena (PbS) with a mass of 744.5 g displaces 48.6 mL of water. What is the density of the mineral
to determine the molar volume of a gas stp a tube containercontaining potassium chlorate and manganese iv oxide
Which of the following buffer systems would be the best choice to create a buffer with the pH= 9.00? For the best system , calculate the ratio of the masses of the buffer components required to make the buffer.
10 g potassium chlorate is decomposed producing oxygen gas and potassium chloride: 2KClO3 + heat -> 2KCl + 3O2. The actual yield of oxygen measures 3.915576 g. Calculate the theoretical amount of oxygen based on your starting mass of reactant.
25 ml of 0.1002 ha was titrated with 10 ml of 0.1997 naoh ph is 4.46 what is the ka value? and what is the ph at
find the molarity of 0.5 grams of sodium chloride is dissolved to make 0.05 ml of solution
An ideal gas originally at .85 atm and 64 degrees C was allowed to expand until its final volume, pressure, and temperature were 94 mL, .60 atm, and 41 degrees C respecitively. What was its initial volume
a tablet of vitamin c was analyzed to determine whether it did in fact contain as the manufacturer claimed 1 g of the
starting from alcohol that contains four or less carbon atoms and from benzene and toluene,
The increase in volume is due to the H2 gas created. 50 g of tin (Sn) is 0.421 moles. That is also the number of moles of H2 that are created. Use tha ideal gas law to compute the added volume due to that gas.
Why is a large steroid molecule able to cross the cell membrane when a small molecule cannot?
Water has vapor pressure of 23.8 torr at 25 degrees celsius. Find vapor pressure of water at 40 degrees celsius if delta H of vaporization is 40.7 KJ/mol.
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