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Question- Using data from Appendix D in the textbook, calculate [OH?] and pH for each of the following solutions.
a) 0.14M NaCN.
b) 8.4×10?2M Na2CO3.
c) A mixture that is 0.12M in NaNO2 and 0.15M in Ca(NO2)2.
I don't know how to reach these answers thus please show the steps, thank you!
A solution of 62.4 g of insulin in sufficient water to make 1.000 L of solution has an osmotic pressure of 0.305atm at 25°C. Based on these data, compute the molar mass of insulin in g/mol.
At equilibrium the rate of change of reactant concentration is zero. F) As a reaction proceeds backwards toward equilibrium the reactant concentrations rise.
consider the following equilibrium system H2(g)+ Br2(g)=2HBr(g) Keq= 14.8 A closed container is initially filled with equal moles of H2 and Br2.When equilibrium is reached the (HBr) is 0.329 mol/L What is the initial (H2)
Using the standard enthalpies of combustion, calculate the standard enthalpies of the following reactions: A. C2H5OH(l)+3O2(g)>2CO2(g)+3H2O(l)
Question- The specific heat of aluminum is 0.900J/g degrees C. Calculate the heat needed to raise the temperature of a 45.0 g block of aluminum from 20.5 degrees C to 297.4 degrees C
a steel tank with a volume of 9.583L contains N2 gas under a pressure of 4.972 atm at 31.8C Calculate the number of moles of N2 in the tank.
How many grams of KHP are needed to exactly neutralize 27.4 mL of a 0.235 M potassium hydroxide solution ?
If 5.00 g Br2 and 3.00 g NH3 react according to the equation below, what is the maximum mass of ammonium bromide produced. 3 Br2(l) + 8 NH3(g) ? 6 NH4Br(s) + N2(g)
A solution is created by adding 0.05 moles of H2CO3 (3.1 g, total mass) to 5-L of water, resulting in a pH of 4.2. Now, we add sodium hydroxide (NaOH, strong base) until the pH reaches 7. You can neglect any changes in volume. What is the alkalini..
Some species with two oxygen atoms only are the oxygen molecule, O2, the peroxide ion, O2-2 , the superoxide ion, O2-1 , and the dioxygenyl ion, O2+1 . Draw an MO diagram for each, rank them in order of increasing bong length, and find the number ..
Question- Calculate the pH and the pOH of an aqueous solution that is 0.035 M in HCl(aq) and 0.090 M in HBr(aq) at 25°C.
the equation of line determined from a beer's law plot is y=0.195x+0.4. what is the resistance of an unknown water sample if the assumed concentration is 650ohms.
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