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You need to dissolve CaCl2 in water to make a mixture that is 31.0% calcium chloride by mass. If the total mass of the mixture is 405.5 g, what masses of CaCl2 and water should be used?
Calculate the amounts of reactants requires to produce 21.8 grams methyl benzoate assuming an 80% yield.
Calculate the theoretical yield of iron in the reaction of 254 g of iron (III) oxide with 25.0 g of carbon, according to the equation 2Fe2O3(s) + 3C(s)> 4Fe(s) +3CO2(g)
Provide a structure for the following compound
Assume that a particular reaction evolves 231 of heat and that 20 of work is gained by the system. What are the values of delta E and delta H for both the system and the surroundings?
How many grams of Na3PO4 will be needed to produce 500ml of a solution that has a concentration of Na ions of 0.600M
Draw the structure of the compound identified by the following simulated 1H and 13C NMR spectra.
In an acid base titration a 25mL portion of a solution containing sulfuric acid (H2SO4) was titrated with a 0.200M NaOH(aq). write the chemical equation for this particular titration
How many grams of dry NH4Cl need to be added to 1.60 L of a 0.700 it M solution of ammonia, NH_3, to prepare a buffer solution that has a rm pH of 8.62? K_b for ammonia is 1.8 * 10^{-5}
A chemical reaction takes place in a container of cross-sectional area 100 cm2. As a result of the reaction, a piston is pushed out through 21 cm against an external pressure of 534 torr.
How many moles of chloride ions are there?
determine How many grams of AlCl 3 are formed if 30.0 grams of Hydrogen are produced? It is given that the molar mass of AlCl 3 =133.33 g/mol.
burning 0.115g of the compound in oxygen gives 0.379g of CO2 and 0.1035g of H2O. what is the empitical formula of mesitylene.
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