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1. At 25 °C, how many dissociated H ions are there in 765 mL of an aqueous solution whose pH is 9.17?
2. In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B.
2 A ---> 3 B
How many molecules of substance B are produced when 30.0 g of substance A reacts? The molar mass of substance A is 23.5 g/mol.
A) Convert the mass of A to moles
B) Convert the number of moles of A to the number of moles of B
C) Concert the number of moles of B to molecules of B
How much heat is realesed at constant pressure if a 10.0-L tank containing 87.0atm of hydrogen sulfide gas condenses at its boiling point of -60.0 Celsiuse?
How many liters of NO(g) can be made from 17.57 L of O2(g) and 16.55 L of N2(g) at STP?
What are two primary advantages of using nuclear power? Uranium reserves on our planet are 5 million metric tons.
A sample containing .221g Cl is dissolved in 50.0mL of water. How many moles of Cl ion are in the solution?
when you reduce benzoin with NaBH4, why do you get mostly the meso compound?
CH3SH, has a substantial dipole mement (1.52) even though carbon and sulfer have identical electronegativities.
The element bromine was first prepared by oxidation of aqueous potassium bromide with solid manganese(IV) oxide. Write a balanced net ionic equation for the reaction in aqueous acidic solution
A 5.0 dm3 sample of oxygen at a pressure of 200kPa and 2.0dm3 sample of nitrogen at a pressure of 500kPa are introduced into a 2.5dm3 vessel.
If the diameter of a sodium atom is 3.14×10-8 cm, how many sodium atoms would fit along a line exactly 6.00 inch long?
A solution containing 100 g of an unknown liquid and 900 g water has a freezing point of - 3.33 oC. What is the molar mass of the liquid? Kf = 1.86oC/m
Within this analogy, discuss how the shielding by core electrons is analogous to putting a frosted-glass lampshade between the lightbulb and your eyes, as shown in the illustration.
If the initial temperature of the water in the calorimeter was 20.25 °C, calculate the calorimeter constant (in J/K) for the coffee cup calorimeter.
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