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When eating a piece of hot apple pie, you may find that the crust is only warm but the apple filling burns your mouth. Why is this? Why do sidewalks have lined joints built into them?
How many liters of dry carbon dioxide gas, measured at standard conditions will be evolved when 400 mL of a 0.20 M sulfuric acid are treated with an excess of potassium carbonate
It requires 251 J to melt 2.22 g of sodium metal at its normal melting point of 98°C. Calculate the molar heat of fusion of sodium.
What is the molarity of a solution containing 1.35 mol H2SO4 in 245 mL of solution
The pressure exerted by 0.100 mol of an ideal gas enclosed in a rigid container at 50.0 degree C is 5.00 atmospheres. If the temperature of the container is increased to 100.0 degree C, what is the new pressure of the gas? the answer is 5.80 atm
You transfer a sample of a gas at 17*C from a volume of 5.67L and 1.10atm to a container at 37*C that has a pressure of 1.10atm. what is the new volume of the gas?
in ploystyrene beaker , we mixed 30 mL of 0.1 M sodium acetate and 15 mL of 0.1 M hydrocloric acid. we measured the PH it was 4.86
Use the ideal gas law to calculate the concentrations of nitrogen and oxygen present in air at a pressure of 1.0 and a temperature of 298 .
Write the balanced net ionic equations for each of the following compounds with aqueous NH4OH 1. HCl (aq) 2. H2SO4 (aq) 3. HNO3 (aq) 4. NaOH (aq)
a volume of water was delivered using a buret and experimentally determined to have a mass of 2.00-g. what was the
In a gas mixture, the partial pressures are nitrogen 435 , oxygen 145 , and helium 240 . What is the total pressure ( torr) exerted by the gas mixture?
A sample of carbonic acid (0.125 L, 0.165 M, pKa1 = 6.35, pKa2 = 10.33) was titrated with 1.53 M NaOH. Calculate the pH at the following points: Before the titration. At the 1st midpoint. At the 1st stoichiometric point.
The Hydrocarbon Benzence, C_6_H_6 boils at 80.1 Celcius. How much energy is required to heat 1.00Kg of this liquid from 20.0 Celcius to the boiling point and then change the liquid completely to a vapor at that temperature?
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