trigonometry
If sin 57=m then express the following questions 1. Sin 237 2. cos 33 3. cos 3 4. cos 66
Chemistry
Explain, not just describe, the relationship between these rankings. Most reactive to least reactive metals: Zn, Pb, Cu, Ag Most reactive to least reactive metal cations: Ag, Cu, Pb, Zn
Chemistry equation
Write a correctly balanced series of chemical equations to describe the stepwise protonation of carbonate ion. Na2CO3 with HCl
Chemistry eq
How many milliliters of 0.430M hydrochloric acid (HCl(aq)) must be added to 15.00mL of 0.682M sodium hydroxide (NaOH(aq)) to reach the equivalence point?
Chemistry eq
How many milliliters of 0.430M hydrochloric acid (HCl(aq)) must be added to 15.00mL of 0.682M sodium hydroxide (NaOH(aq)) to reach the equivalence point?
Chemistry titrations
25.00mL of an unknown sulfuric acid solution is titrated to the second equivalence point with 21.02mL of 0.420M potassium hydroxide solution. What is the concentration of the sulfuric acid solution?
Chemistry
How many mols of OH-(aq) ions are present in 20.33mL of 1.33M sodium hydroxide solution?
Chemistry
How many mols of tyrosinate ions (C9H10NO3-(aq)) are present in 909mg of sodium tyrosinate solid (NaC9H10NO3)?
Chemistry
What is the difference between a forward and a reverse reaction? I am studying Lechatelier's principal and it states that with an increase in temperature it favors a reverse reaction and when the temperature decreases it favors a forward reaction. What does this mean exactly?
chemistry concentrations
You have combined the following: 7.92mL of 1.122M Fe(NO3)3(aq), 5.02mL of 1.849M NaCl(aq), and 7.09mL of water. What is the concentration of chloride ions in the resulting solution? Assume liquid volumes are additive
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