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The stannous fluoride in a 10.000g sample of toothpaste was extracted and then percipitated with lanthanum nitrate solution. If the mass of the percipitate is 0.105g explain what is the percentage of stannous fluoride in the toothpaste sample?
3SnF2(aq)+2La(NO3)3(aq)---> 2LAF3(s)+3Sn(NO3)2(aq)
suppose a single component material x has a critical temperature of 350.0 k and critical pressure of 7.50 atm. the
A sample of nitrous oxide gas, N2O in a nonrigid container at a temperature of 33C occupies a certain volume at a certain pressure. What will be its temperature in degree Celsuis in each of the following situations? a)Both pressure and volume are ..
What weight of A would be removed from the same solution by successive extraction with four portions of 25mL of hexanes? How much hexanes would be required to remove 98.5% of A in single extraction?
If 4.00 L of HCl(g) at 1.00 barr and 273K and 26.0g of I2(s) are transferred to a 12.00 L reaction vessel and heated to 25C, what will the equilibrium concentrations of HCl, HI, and Cl2 be? Kc = 1.6 x 10^-34 at 25C for 2HCl(g) + I2(s) 2HI(g) + C..
The vapor pressure of pure liquid A at 300K is 575torr and that of liquid B at 300K is 390torr. The molar volume of A is 0.0262L/mol and that of liquid B is 0.0306L/mol. Calculate the final partial pressures of A and B in the gas phase.
The oxygen conversion is 82.0%, and the concentration of the ethanol in the product stream is three times that of the aldehyde and four times that of the acetic acid. (a) What is the fractional conversion of ethane. (b) What is the production rate..
Many elements can have more than one charge or oxidation number. In this set of problems, we will assign oxidation numbers to each atom in sulfate, carbonate, bicarbonate, bisulfate, sulfite, nitrate, nitrite, chlorate, and perchlorate.
A 10.0 balloon contains gas at a pressure of 640 torr. What is the new pressure of the gas at the 22.0 liters volumes if there is no change in temperature.
What is the formula for a bicarbonate salt using X to represent any +1 charged cation. Same question for the formula for a carbonate salt.
For propanoic acid (HC3H5O2, Ka = 1.3 multiplied by 10-5), determine the concentration of the species present, the pH, and the percent dissociation of a 0.27 M solution.
what is the molar concentration of a h3po3 solution if 150.00 ml of the solution was required to neutralize 75.00 ml of
Add curved arrows to both structures to show the delocalization of electron pairs needed to form the other resonance contributor.
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