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A 0.146 g sample of an unknown monoprotic acid (molar mass = 83.0 g/mol) was dissolved in 50.0 mL of water and titrated with a 0.101 M NaOH solution. After the addition of 14.0 mL of base, the pH was 5.12. What was the Ka for the unknown acid?
At a certain temperature the equilibrium pressure is .718 atm. Calculate Kp for the reaction
The minimum frequency of light needed to eject electrons from a metal is called the threshold frequency, ?0. Find the minimum energy needed to eject electrons from a metal with a threshold frequency of 5.73 × 10^14 s-1.
What is the relationship between K and Kc?
Three colorless solution in test tubesm whit no labels arein a test rack on the laboratory bench. lying beside the test tubesare three labels, potassium iodide, KI, silver nitrate, AgNO3 andsolution sulfide Na2S
A second-order reaction of the type A+2Bâ†'P was carried out in a solution that was initially 0.050 mol dmâˆ'3 in A and 0.030 mol dmâˆ'3 in B. After 1.0 h the concentration of A had fallen to 0.010 mol dmâ
Calculate the pH in a solution prepared by dissolving 0.08 mol of solid NH4CL in 0.450 L of 0.35 M NH_3. Assume that there is no volume change.
what mass of magnesium will react wait a 500.0mL container of oxygen at 150.0 degrees Celsius at 70.0 kPa?
How many grams of CaCl2 would be dissolved in 1.2 L of a 0.10 M solution of CaCl2?
write a balanced equation for the reaction between the iodide ion, a peroxide, and the hydrogen ion.
If 125 cal of heat is applied to a 60.0 g piece of copper at 24C, what will the final temperature be? The specific heat of copper is 0.0920cal/(g x C).
Permanganate ions, MnO4-, oxidize acetaldehyde, CH3CHO, to acetic acid CH3CO2H, and are reduced to MnO2. The reaction takes place in acidic solution.
Suppose a 5.00mL sample of vinegar required 27.58mL of 0.123 M sodium hydroxide to reach the endpoint. What is the molarity of acetic acid in the vinegar?
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