Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
A soft drink contains 35 mg. of sodium in 315g. of H2O. What is the concentration of sodium in the soft drink in mass percent?
Suppose that 45.0 g of water at 85°C is added to 105.0 g of ice at 0°C. The molar heat of fusion of water is 6.01 kJ/mol and the specific heat of water is 4.18 J/g°C. Based on this: a) w
If, in a certain experiment, over a specific time period, 0.0048 mol PH3 is consumed in a 2.0-L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?
Consider a gas at 1.00 atm in a 5.00 L container at 20 degrees celsius. What pressure does the gas exert when transferred to a volume of 2.77 L at 43 degrees celsius?
The hot combustion product gas passes through a boiler in which heat transferred from the gas converts boiler feedwater into steam. Calculate the concentration of CO (ppm) in the stack gas on a dry
At a particular temperature, N2O5 decomposes according to a first-order rate law with a half-life of 3.0 s. If the initial concentration of N2O5 is 1.0 × 1016 molecules/cm3, what will be the c
What mass of ethanol, C2H5OH a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0C? Assume the density of water is 1.0 g/mL. Kf of water is 1.86C/m.
To produce 856 g of ammonia gas using air as your source of nitrogen gas, what volume of air is required if the air is introduced at 27°C and 760 mmHg? (the mole fraction of nitrogen gas in air
A 260-{rm mL} flask contains pure helium at a pressure of 759 {rm torr}. A second flask with a volume of 470 {rm mL} contains pure argon at a pressure of 725 {rm torr}.If the two flasks are connecte
Write four balanced equations for the reactions to separate and recover m-nitroanilin, benzoic acid, and naphthalene. Write out the full structures.
When 31 g of phosphorus reacts with oxygen gas, 71 g of an oxide of phosphorus is the product. What mass of oxygen gas is needed to produce 13 g of this product? (2 significant figures).
Predicting Membrane Protein Topology from Sequence You have cloned the gene for a human erythrocyte protein, which you suspect is a membrane protein.
A 20.0-milliliter sample of .200-molar K2CO3 solution is added to 30.0 milliliters of .400-molar Ba(NO3)2 solution. barium carbonate percipitates.
Electrons can be used to probe the arrangement of atoms on a solid surface if the wavelength of the electrons is comparable with the spacing between the atoms. Which of the following electron veloci
The specific heat of compound A is 0.50 cal/g °C. What amount of heat has been added to 100.0 g of compound A if the temperature changes by 5.0°C?
Find the corresponding reaction enthalpy and estimate the standard enthalpy of formation of the compound at 583 K. The constant-pressure molar heat capacity of benzene is 136.1 J K-1 mol-1 in its li
The evaporation of water is endothermic as indicated by the following: What minimum mass of water has to evaporate to absorb 160 kJ of heat?
Write a balanced chemical equation for the reaction Mg+ HCl. Given that 1 mole of Mg produces 1 mole of hydrogen, H2 what is the volume of 1 mole of hydrogen at room temperature and 1 atmospehre pre
2C2H6 + 7O2---> 4CO2 + 6H2O if the reaction produces 2.75 mol of H2O how many grams of CO2 are also produced?
A solution of 75 mL of 0.2 M NH3 is titrated with 50 mL of 0.5 M HNO3. What is the pH of the resulting solution when 17 mL of HNO3 is added to the solution? Kb for NH3 is 1.8 × 10-5.
An experiment requires 44.0 g of ethylene glycol, a liquid whose density is 1.114 g/mL. Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder
How does EDTA react with soap. i know it reacts with sodium by replacing some of the hydrogens of the hydroxyl groups with sodium ions but would it attach to a soap molecule.
how many grams of lead (II) chloride is produced when 13.87 g lead (II) nitrate combines with hydrochloric acid to produce lead (II) chloride and nitric acid?
What is the actual concentration of water vapor, expressed in ppm? the vapour pressure of water at 35 degree Celsius is 42 mm Hg.
Which salts are more effective for cold and hot packs, KNO3, NH4NO3, MgSO4, CaCl2, MgCl2? which are most cost effective? Maximum and minimum T for both?