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A sample of oxygen has a volume of 4.50 liters at 300 K and 800.0 mmHg, how many oxygen molecules does the sample contain?
Approximately 80% of the mass of a human body consists of aqueous solutions (spinal fluid, blood, etc.) These solutions are unsaturated salt solutions that are .21M NaCl and have a density of 1 g/mL
For each of the following situations, state if the amount of each of the constituents of this system (C(s), H2(g), and CH4(g)) show an increase, decrease, or if it stays constant as the system comes
25 grams of white vinegar is titrated with a standard solution of .5M KOH. 39 mL of KOH is required to neutralize the vinegar. Find percent of vinegar that is acetic acid.
Given that the heat of fusion of water is -6.02 kJ/mol, that the heat capacity of H2O (l) is 75.2 J/mol*K, and that the heat capacity of H2O (s) is 37.7 J/mol*K, calculate the heat of fusion of water
Consider this skeleton reaction in acidic solution. Split it into oxidation and reduction half reactions and balance them. Then give the overall balanced net ionic equation. Identify the OA and the
Find the adiabatic flame temperature in the complete combustion of propane (C3H8) entering at 2.5 bars and 25 C with air entering at 1 bar and 220 C. Please presume all the gases are ideal and look
A 100.0 mL sample of acetic acid solution of unknown molarity is titrated with 0.15 M NaOH solution. the titration requires 43.25 mL of the base. Determine the molarity of the acid, CH3COOH.
What is the molarity of lead(II)nitrate solution if 50.00ml of the lead(II)nitrate solution is reacted with aluminum, producing 3.580g of dry metal? Include the balanced molecular equation.
Calculate the final temperature of the mixture. Assume that no energy in the form of heat is transferred to the environment. (heat of fusion=300J/g; c(ice) =2.06J/g*K, c(water)=4.184J/g*K.
A previously evacuated tank with a capacity of .1m^3 is pressurized with 1kg each of helium(molar mass 4.0) and nitrogen(molar mass 28.0) what is the final pressure of the mixture?
The vapor pressure of nitrogen at several different temperatures is shown below.
A glucose solution contains 52.0 g of glucose (C6H12O6) in 465 g of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/ml for water.)
Suppose you inject 25.0 mL of air into a vessel at 22.0 C, which causes the pressure in the vessel to change by 0.30 atm. How many moles of gas molecules caused this change?
Identify the oxidizing and reducing agents in the following reaction: Sn+4HNO3 +4HCL+2NaCl=Na2SnCl6+4NO2+4H2O
An aqueous solution containing 34.1 g of an unknown molecular (nonelectrolyte) compound in 141.3 g of water was found to have a freezing point of -1.5 degrees C. Calculate the molar mass of the unk
An analysis of drinking water, found it to have 4.5 ppb (parts per billion of arsenic). How many grams of arsenic are in a 3.0 Kg sample of water?
The reaction for producing glucose in plants is called photosynthesis is 6CO2+6H20=C6H12O6+6O2. if a plant produce 6.26 mol of C6H12O6, how many moles of CO2 are needed
Calculate the enthalpy change when 5 mole of CO is consumed.
Derive an expression for the compression factor of a gas that obeys the equation of state p(V-nb)=nRT, where b and R are constants. If the pressure and temperature are such that Vm=10b.
Using IUPAC substitutive nomenclature rules, write the name of the major organic product when 1-propanol reacts with concentrated sulfuric acid under heated conditions
When answering, include an explanation, balanced chemical equations and/or calculations where appropriate.
What is the mass, in grams, of a sample of 1.20 × 1022 atoms of mercury (Hg)? Show your work or explain the steps that you used to determine your answer.
At standard temperature and pressure (0 C and 1.00atm ), 1.00mol of an ideal gas occupies a volume of 22.4L. What volume would the same amount of gas occupy at the same pressure and 55C?