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Brass is a substitutional alloy consisting of a solution of copper and zinc. A particular sample of red brass consisting of 80.0%Cu and 20.0% Zn by mass has a density of 8780 k/m3.
a)What is the molality of in the solid solution? (mol/kg)
b)What is the molarity of in the solution?
How many milliliters of O2 gas at 25 C and 1.00 atm pressure are obtained by the thermal decomposition of 0.470g of KMnO4? The balanced equation for the reaction is:
If 4.00 g of the unknown compound contained 0.133 mol of C and 0.267 mol of H, how many moles of oxygen, O, were in the sample?
calculate the ph of a 0.070 M sodium acetate CH3COONa and 0.020M acetic acid CH3COOH buffer The ka is 1.7x10^-5
The enthalpy change for the reaction below at 25oC is -1,850 kJ (per mole of C9H20). What is the internal energy change for the reaction at 25oC
A gas at 439 K occupies 5.98 L at a pressure of 1.38 atm. What will its pressure (in atm) be at 228 K if its volume is reduced to 4.40 L
Assume the products are all gaseous. Show all your work. What is delta G and is the reaction spontaneous at 298K or nonspontaneous
What is the concentration of Ca2+ ions in a solution of CaI2 that has I- ion concentration of 0.520 M.
Using the information from question 1, what are the stoichiometric coefficients for the reactant and products if you leave water as the last product
Of the two materials VO and NiO, which would be expected to exhibit more metallic properties?
determine what would be the concentration of the final solution if you take a ten mili litres portion of the stock
what is delta Urxn for the combustion X; the hardware compnent of the calorimeter has a heat capcity of 3.63kj/*c. the specific heat of water is 4.184j/g*c the MW of X is 56.0 g/mol
you have dissolved 0.298 g of soda ash into 80 mL of deionized water. It took 19.8 mL of 0.0998 M HCl to titrate the solution to the second equivalence point. What is the percent Na2CO3 in the soda ash?
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