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Question- The metal gold crystallized in a face centered cubic lattice with an atomic radius of 144.2 pm. what is the density of gold?
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If 30.00 mL of 0.500 M KOH are needed to neutralize 10.00 mL of HCl of unkown concentration, what is the molarity of the HCl
1. what mass of kclo3 will produce 48.00 g of o2 if the decomposition of kclo3 is complete? the answer is 122.5 can you
sample of an unknown was dissolved in 10.7 g acetic acid. If the freezing point depression of the solution was 4.14°C, find the molar mass of the unknown
The mole fraction of substance A is 0.35. At 32 degrees C the vapor pressure of pure A is 87mmHg as well as the vapor pressure of pure B is 122 mmHg. Explain what is the total vapor pressure of the solution at this temperature
Dissolving 4.69g of an impure sample of calcium carbonate in hydrochloric acid produced 1.07 L of carbon dioxide (measured at 20.0 degrees Celcius and 737mmHg). Calculate the percent by mass of calcium carbonate in the sample.
when sodium is heated a yellow spectral line whose energy is 3.37x1019 jphoton is produced. what is the frequency and
A weak monoprotic acid is titrated with NaOH, and the following data are recorded. Calculate the molar mass of the weak acid. original volume of acid solution = 50.00 mL mass of acid (a solid) = 0.3459 g
A chemical process requires 8.700 g-mol of calcium sulfate (CaSO4) for a reaction. How many grams are in 8.700 g-mol of calium sulfate
The combustion of carbon with excess oxygen forming carbon dioxide is exothermic. C(s) + O2(g) => CO2(g) ?Hrxn = -393 kJ If 9,494kJ of heat is needed from the combustion
Problem- Choose a compound to make a buffer of pH=9 and calculate the weight of the buffer needed to make 100ml of 0.1M solution.
The balanced equation for trans-1,2-dibenzoylethylene in ethanol to give the product cis-1,2-dibenzoylethylene
An experiment shows that a 112-mL gas sample has a mass of 0.120 g at a pressure of 733 mmHg and a temperature of 33.0°C.
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