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A sample containing 0.175 g of cl- is dissolved in 50 ml of deionized h2o. The solution is titrated to the equivalence point with a AgNO3 solution. The final volume of the titrated sample is 75 mL.
How many moles of are in the tube of toothpaste? How many fluoride atoms are in the tube of toothpaste? How many grams of sodium ion are in 2.10 toothpaste? How many molecules of triclosan are in th
A cylinder with a moveable piston contains 0.93 of gas and has a volume of 344. What will its volume be if an additional 0.22 of gas is added to the cylinder? (Assume constant temperature and pressu
what is the equation for ninhydrin test of egg white? also for the ninhydrin test of aspartame?
The compound X2Y has a molar mass of 110.27 g/mol. The ratio of X:Y (by mass) in the compound is 2.44 : 1. What is the compound? The name of the compound is ??
A sample of gas is collected over water at a temperature of 28.0°C when the barometric pressure reading is 742.5 torr. What is the partial pressure of the dry gas?
How much energy will be needed to heat 45.7 gal of water from 22.0 oC to 110.0 oC? (Note that temperature 110.0 oC can be at a certain pressure greater than 1 atm. Note that 1.00 gal weighs 3.77 kg
A 6.75-g sample of gold (specific heat capacity = 0.130 J/g oC) is heated using 34.6 J of energy. If the original temperature of the gold is 25.0 oC, what is its final temperature?
Suppose 600. g of P4 reacts with an excess of S8. How many grams of P4S10 can be produced, assuming 80.0% yield based on the limiting reactant?
Given the reaction 4Al(s)+302(g)--2Al2O3(S),what is the minimum number of moles of oxygen gas required to produce 1.00 mol of aluminum oxide?
A piston has an external pressure of 15.0 . How much work has been done if the cylinder goes from a volume of 0.150 liters to 0.530 liters.
Calculate the equilibrium constant, Kc, she obtained for this reaction.
Even with a drying tube, leaving phenylmagnesium bromide exposed to air will eventually lead to its decomposition. Why? What is the product of this decomposition pathway?
A specimen of iron ore weighing 0.500g was dissolved in dilute sulphuric acid. The solution was titrated with 0.0200M potassium permanganate, 6.25cm3 being required. The solution was reduced electro
The rate-determining step is the decomposition of the intermediate enzyme-substrate complex (ES) to prodcuts (P). Under these conditions, show that the overall rate of product formation is
If 94 of heat are added to a pure gold coin with a mass of 16 , what is its temperature change? Specific heat capacity of gold is 0.128 .
What are the freezing point and boiling point of an aquenous solution of 15.5g glucose (C6H12O6) dissolved in 150 g of water?
Imagine that you dissolve 10.0g of a mixture of NaNO3 and KF in 100.0g of water and find that the temperature rises by 2.00 degrees C. Using the following data, calculate the mass of each compound i
Explain the order of elution you observed while performing the gas chromatography for this experiment. What property of the product molecules seems most important in determining relative retention t
What is the percent yield if 4.65g of copper is produced when 1.87g of aluminum reacts with an excess of copper(II) sulfate?
Determine the empirical formula of sodium azide.
Design a range of five volumes of the NaCl standard solution that you will spike into equal aliquots of the unknown. First decide what volume of tonic water unknown to add to each 25-mL volumetric f
Electromagnetic radiation has an energy of 926 J. The wavelength of this radiation is 856 nm. How many photons are required to generate this energy?
A solution of sodium chloride in water has a vapor pressure of 20.1 torr at 25°C. What is the mole fraction of NaCl solute particles in this solution?