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What technique would you use to determine the density of approximately 5 grams samples of granular sugar at 20 degress celsius and 1 atmosphere pressure
How many grams of barium sulfate are produced if 25.34mL of 0.1133 M BaCl2 completely react given the reaction. BaCl2(aq)+Na2SO4-BaSO4(s)+2NaCl(aq)
explain the basis of your decision and note if the bond(s) formed are ionic or covalent. a.) sodium and fluorine b.) nitrogen and hydrogen c.) silicon and oxygen d.) chlorine and bromine (please explain in details.)
Calculate the pH of the solution resulting from the addition of 20 mL of 0.10 M NaOH to 100 mL of 0.10 M HCN (Ka = 4.9x10^(-10))
Assuming that the heat capacities don't change with temperature, how much energy in kilojoules is needed to heat 5.25g of Hg from a temperature of -59.5C to 43.0C
Two containers are connected by an open tube. One container (A) is at 300K, the other (B) is at 600K. These two containers must have
A dark glass bottle of chemicals is found in cleaning out an old basement. Part of the label has been eaten away with age. Only the last part of the label is readable.
Explain in terms of their structures why each of the following pairs of substances have very different chemical and physical properties (a) Silica and carbon dioxide (b) oxygen and sulfur
Determine if a precipitate forms when the following solutions are mixed. Write the overall equation, the total ionic equation, and the net ionic equation. PbNO3(aq) + 2KI (aq) ? overall equation: total ionic: Net ionic equation
How many grams of cobalt metal can be formed if a 2.00 amp current is passed through a solution of Co2+ for a period of 20.0 minutes
Carbon-14 has a half-life of 5730 years. A sample of carbon with a mass of 0.120 g has an activity of 40 decays/hr. The initial specific activity is assumed to have been 900 decays/hr/gram. How old is the sample
a bacterial culture isolated from sewage produced 35.5 ml of methane ch4 at 31 oc and 753 mmhg. what is the volume of
Determine the molar mass of the acid and given that the pH at the half way point to the equivalence is 3.86. Calculate the Ka of the unknown acid.
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