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2 NaHCO3(s) Na2CO3(s) + CO2(g) + H2O(g) Heating a 1.7184-g sample of impure NaHCO3 gives 0.196 g of CO2. What was the mass percent of NaHCO3 in the original 1.7184-g sample?
A container holds 355 mL of a mixture of nitrogen and carbon dioxide gases. Calculate the partial pressures of each gas if the container is at 27.3oC.
Write a balanced the rmochemical equation for the reaction with an energy term in kJ as part of the equation.
a solid block of exactly 100.0 cm3 has a mass of 153.6g. Determine its density. will the block sink or float in water
Calculate the density of a block.
The work function for mercury is equivalent to 435 kj/mol photons. When light of 205nm strikes a mercury surface,the kinetic energy is 2.47x10^-19 J/photon. What is the velocity of the ejected electrons in m/s?
the combustion of a fuel is found to raise the temperature of 500cm^3 of water by 20degrees celecius. how much energy is released by the fuel?
A portable electric water heater transfers 255 watts (W) of power to 5.5 L of water, where 1 W = 1 J/s. How much time (in minutes) will it take to heat the 5.5 L of water from 24 degrees C to 41 degress C? (Assume that the water has a density of 1..
If the solution is 40.0% K2CO3 by mass, what is the predicted freezing point of this solution in °C, assuming full ionization.
In the following reaction, how many moles of the non-limiting reactant are in excess if 4.4 mol Al are combined with 2.7 mol HCl
Determine the number of moles of O2 produced by the decomposition of 426 g of NaClO3
Write a balanced chemical equation, including physical state symbols, for the combustion of gaseous methan into gaseous
If a total of 13.5 mol NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of COs and NA3C6H5O7 will be produced? 3NaHCO3(aq) + C6H8O7(aq) -> 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq)
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