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The ion-accelerating voltage in a particular quadrupole mass spectrometer is 5.00 V. What is the velocity of a singly charged benzene ion (m = 78 Da) after acceleration? e = 1.60 x 10^-19 C
Calculate the boiling point (in Celsius) of 25% of an antifreeze in water. The antifreeze is a covalent compound with a molar mass
A camping lantern uses the reaction of calcium carbide, CaC2 (s) , and water to produce acetylene gas C2H2 (g) , and calcium hydroxide, Ca(OH)2 (s) . How many grams of water are required to produce 1.55 moles of acetylene gas
a mixture of gases containing .20 mol of SO2 and .2 mol of O2 in a 2.0L flask reacts to form SO3. If the temperature is 25C, what is the pressure in the flask after reaction is complete?
The lead contained in a 0.2000 g sample is precipitated as PbCrO4. The precipitate is filtrated, washed and re-dissolved in acid to give lead ions and dichromate.
In the laboratory, a student named Georgia weighed 4.75 grams of an unknown solid mixture containing benzoic acid, copper (II) sulfate and sand. She added 15mL of acetone to her sample. Which component of the mixture is dissolved in the acetone?
Mg3N2(s) + H2O(l) → Mg(OH)2(s) + NH3(g) If this process is 82% efficient, what mass of ammonia can be prepared from 22.0 kg magnesium nitride.
What mass of rm NaOH is needed to precipitate the rm Cd^{2+} ions from 35.0 mL of 0.540 M rm Cd(NO_3)_2 solution?
Now if your lab partner needed 7.030 x 1019 molecules of Sodium cyanide (NaCN), how many milligrams would you need to weigh out?
A solution contains an unknown mass of dissolved silver ions. when potassium chloride is add to the solution.,a white precipitate forms.
Stoichiometry of reactions, When a mole of C7H16 is combusted, it reacts with 11 moles of O2. How many moles of CO2 product are obtained? How many moles of H2O product are obtained?
the pressure exerted on a 240 mL sample of hydrogen gas at a constant temperature is increased from .428 atm to .724 atm. What will the final volume of the sample be.
How many L of H2 gas (at STP) is produced from 470 mL of 0.36 M HCl and excess Zn? The reaction is: Zn + 2HCl = ZnCl2 + H2
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