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Explain what happens to the atomic number of a nucleus when positron emission occurs.
a. A 0.1044 gram sample of an unknown monoprotic acid required 22.10 mL of 0.0500 M NaOH to reach the end point. What is the molar mass of the unknown?
A 25.0 ml sample of 0.105 M HCl was titrated with 31.5 ml of NaOH. What is the concentration of the NaOH
what is the equilibrium pressure of hydrogen sulfide if the equilibrium pressure of hydrogen is 0.103 atm and the equilibrium pressure of sulfur is 0.417 atm?
A flask contains 0.120 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
the pressure of the vapor in this experment when the flask was full of vapor was assumed to be equal to the pressure of the atmosphere in the laboratory. why is this assumption valid
Calculate the maximum number of moles and grams of H2S that can form when 152 g aluminum sulfide reacts with 147 g water.
134 mole of KCl and .167 mole of CaCl2 were dissolved in water. What is the total number of Cl ions in the solution?
What is the minimum potential (V) required to produce both the oxidation and reduction products written above?
C a spherical balloon had the diameter of 50.0 cm. When taken outside on a hot summer day, the balloon expanded to 51.0cm in diameter. What was the temperature outside?
In a teaspoon (5.0ml ) of a common liquid antacid, there are 150mg Ca(OH)2 and 150mg Al(OH)3 . A 8.3×10-2 M HCL , which is similar to stomach acid, is used to neutralize 5.0 ml of the liquid antacid.
A 29.0-g sample of water at 260. K is mixed with 48.0 g water at 300. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
For the equilibrium H2(g)+ CO2 (g) H20 (g) + CO(g) Kc = 3.18 at 1106K. If each of the four species was initially present at a concentration of 3.000M, calculate the equilibrium concentration of the CO(g) at this temperature
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