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Problem- A 125.0 L weather balloon filled with 6.1 moles of helium as a small leak. If the helium leaks at a rate of 10 mmol/hr, what is the volume of the balloon after 66 hours?
I need work shown so I know how the answer was come up with- I keep trying to utilized Avogadro's law however I do not know where to start. I know 10 mmol would be 0.01 mol. However not sure where to go from there best answer will be the one with explanation
State the chemical equation for the acid base reaction between sodium hydroxide and ethylenediamine dihydrochloride
compatible combination was titrated with 0.1021M standardHCl. It took 20.97mL to reach the phenolphthalein end point and 42.00mL to reach the bromocresol greenend point.
If the pressure exerted by a gas at 25°C in a volume of 0.032 L is 2.79 atm, how many moles of gas are present?
Calculate the pH of the solution after 52.00 mL of HNO3 is added. What is the: 1) moles of KOH: 2) moles of HNO3: 3) [H3O]+: 4) pH of the solution
The drug zalcitabine (also known as ddC) is a weak base with the following molecular structure. It has a pKb of 9.8. What is the percentage of the base is protonated in aqueous solution and contains 565mg/mL
What is the equivalence volume, Ve, in milliliters? Calculate the concentration of Ca2 at V = 1/2 Ve?
A flask contains 0.500 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
Cis/trans isometry is graded -it may help to draw hydrogen atoms associated with the carbon atoms of the double bond
Algebraically substitute in the symbols for the specific heat capacities for the copper and water (Cs,Cu, and Cs,H2O), the symbols for masses (mCu and mH2O), and the symbols for the temperature change (Tf, Ti, Cu, and Ti,H2O).
Write a total ionic equation for the reaction (if any) of FeCl2 solution with Cu, and for the reaction (if any) of FeCl2 solution with Al.
A rolaids tablet contains calcium carbonate, which neutralizes stomach acid. If a rolaids tablet neutralizes 42.15 mL of 0.320 M hydrochloric acid, how many milligrams of calcium carbonate are in a rolaids tablet. CaCO3(s) + 2HCI(aq) -(arrow right)..
In a laboratory 6.80g of Sr(NO3)2 is dissolved in enough water to form 0.450L of solution. A 0.120L sample is withdrawn from this stock solution as well as titrated with a 0.0300M solution of Na2CrO4.
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