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How many molecules are in 22.41 L of an ideal gas at STP? Remember the answer is supposed to be in molecules, not moles. Use Avogadros number (6.022 * 10^23 molecules per mole).
To prepare 5.0 L of a 3.50 M solution of Potassium Hydroxide (KOH), how many grams of Potassium Hydroxide must be used?
Water has vapor pressure of 23.8 torr at 25 degrees celsius. Find vapor pressure of water at 40 degrees celsius if delta H of vaporization is 40.7 KJ/mol.
Compute the final temperature of the solution (assuming no heat lost to the surroundings ) the solution has a specific heat capacity = 4.18 J/°C·
How much heat is released when 25mL of 0.10 M NaOH reacts with 50 mL of 0.10 M HCl?
Why might your sample not have the same melting range as either of the known compounds, given that it must be one of them?
A solution of 100 mL of 0.2 M NH3 is titrated with 50 mL of 0.5 M HNO3. What is the pH of the resulting solution? Kb for NH3 is 1.8 × 10-5.
At a certain temperature, K = 9.1 10-4 for the following reaction. FeSCN2+(aq) Fe3+(aq) + SCN -(aq)
You have a 48.9 g sample of water at the temperature of -60.0 degrees celcius. How much energy is required to: a) heat the ice to 0 degrees celcius
whats the ph of a solution of 1000 mg of vitamin C (176.1 g/mol) in water (Ka = 8*10^5) diluted to 254 mL
An unknown mass of each of the given substances 1.Sand (tf=70.4 C),2.Pyrex glass(tf=67.6 C),3.water(tf=55.9 C) ,4.ethanol (tf=45.9 C), initially at 19.0 degrees Celsius, absorbs 1930 Joules of heat. Find out the mass of each substance.
What is the percent yield if 6.25 g S2Cl2 is isolated from the reaction of 10.0 g S8 and 7.50 g Cl2?
Limestone (CaCO3) is decomposed by heating quicklime (CaO) and carbon dioxide. Calculate how many grams of quicklime can be produced from 9.0 kg of limestone.
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