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How many grams of water are needed to make 100.00g of a 7.23% sodium bromide(m/m)solution?
A sample of a commotion whose half-life is known to be 7.50 minutes was measured from 10:03 to 10:13. The total number of counts evidence in this 10-minute interval was 34,650. Explain what was the activity of the sample in counts per minute at 10..
Sodium metal reacts with water to produce hydrogen gas and sodium hydroxide according to the chemical equation shown below. When 0.030 mol of Na is added to 100.00 g of water, the temperature of the resulting solution rises from 25.00°C to 37.90°C
Crude oil pumped out of the ground may be accompanied by formation water, a solution that contains high concentrations of NaCl and other salts. If the boiling point of a sample of formation water is 2.8 degrees C above the boiling point of pure wa..
calculate delta h degree rxn for the reduction of v2o5. the table is v2o5s -1550.6 deltah degree kjmol h2g 0 deltah
Why does Mg impart no colour to Bunsen flame while calcium does
The molality of the solution is 8.51m. If 2.00 mLs of this solution is transferred to a 500 mL volumetric flask and diluted to volume with water, what is the percent A by weight, the ppm A, and the molarity of the solution. What is the mole fracti..
The composition of a gas on a dry basis is 71.0 mole% N2, 12.0% O2, 12.0% CO2, and 5.0% CO. If the mole fraction of water is 0.160, what is the gas composition on a wet basis?
Calculate how many gramsof chlorine are needed to react with 100.0 grams of methane. finally, calculate how many grams of dichloromethane are formed from 100.0 grams of methane, if present yield for the reaction is 80%.
How do the standard amino acids differ from one another? What effect does unsaturation in fatty acids have on the melting point of the structure?
You determine the mass of a clean dry beaker and found that it was 58.1884 g. You filled water up to the mark and transferred this to the beaker and found that the new mass was 82.9658 g. What is the actual volume of the pipet?
What is the entropy change of the surroundings when 10. g of acetone, CH3COCH3, condenses at its normal boiling point
A certain weak base has a Kb of 7.80 × 10-7. What concentration of this base will produce a pH of 10.16
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