23,980 Answered Questions for the topic chemistry

Chemistry

20h

Chemistry, Acid Base Titration

What is the pH if you have 1.0M weak acid with pKa = 5.55?If you add 20.0mL of this weak acid with 20.0mL of 1.0MNaOH, a strong base, what would be the resulting pH?Please explain the steps thanks.
Chemistry

22h

Hess' Law Chemistry

When using Hess’s Law to calculate rnthalpy of a rxn, what does a negative or positive (delta)H mean? When do you add or subtract and why?
Chemistry

1d

Chemistry question

A solution is made by combining 75.0 mL of 0.0040 M Na2SO4 and 25.0 mL of 0.080 M AgNO3. Calculate the final concentrations of all four ions in solution. The Ksp of Ag2SO4 is 1.5 x 10^-5.
Chemistry

1d

Chemistry question

Determine the equilibrium concentrations of both Cu(NH3)4 2+ and Cu2+ in a solution made initially to be 0.010 M Cu(NO3)2 and 0.100 M NH3. The Kf for Cu(NH3)4 2+ is 1.0 x 10^-12
Chemistry

1d

Is work function of a metal the same as ionisation energy?

Chemistry

1d

Chemistry question

Which ion has the largest radius? (A) CI- (B) F- (C) K+ (D) Ca2+ could you explain which option is the correct answer?
Chemistry

1d

Chemistry question

In which pair of particles is the first member larger than the second member?(A) Li + ; Be2+(B) Li + ; Li(C) Li + ; Na +(D) Be; MgCould you explain which option is the correct answer
Chemistry

4d

Determine the empirical formula and the molecular formula for Ibuprofen.

buprofen, the pain reliever in Advil and Motrin contains 75.69% C, 8.80% H, and 15.51% O by mass. The molecular mass is 206.3 g/mol. Determine the empirical formula and the molecular formula for... more
Chemistry

4d

The total mass of aluminum hydroxide at the end of the reaction was 0.94g. What was the percent yield of this experiment?

A student in a chemistry lab mixes 13.8g of aluminum sulfate with 2.04g calcium hydroxide to produce aluminum hydroxide and calcium sulfate.The unbalanced reaction is: Al2(SO4)3 + Ca(OH)2  Al(OH)3+... more
Chemistry

4d

What mass of aluminum hydroxide is produced?

A student in a chemistry lab mixes 13.8g of aluminum sulfate with 2.04g calcium hydroxide to produce aluminum hydroxide and calcium sulfate.The unbalanced reaction is: Al2(SO4)3 + Ca(OH)2  Al(OH)3+... more
Chemistry

4d

limiting reactant

A student in a chemistry lab mixes 13.8g of aluminum sulfate with 2.04g calcium hydroxide to produce aluminum hydroxide and calcium sulfate.The unbalanced reaction is: Al2(SO4)3 + Ca(OH)2  Al(OH)3+... more
Chemistry

5d

what is the expression for keq for: 3a(g)+1b(g)<->2c(g)+2d(g)

Chemistry

6d

what is the total concentration of all ions in a solution formed by dissolving 1.50 g Al2(SO4)3 in 100.0 ml of solution?

what is the total concentration of all ions in a solution formed by dissolving 1.50 g Al2(SO4)3 in 100.0 ml of solution?
Chemistry

6d

Are claw machines an example of high entropy? explain

Chemistry

6d

At 25 C, Keq = 0.90 for the reaction: H2O + Cl2O = 2HOCl (all gases)

Calculate the concentrations of all species at equilibrium a) if 1.0g of H2O and 4.83 g of Cl2O are mixed in a 1-L flask. b) 1.0 mol of pure HOCl is placed in a 2.0-L flask
Chemistry

7d

Requesting a tutoring session

I thought I messaged and requested a tutoring session for my son last night for a session today, but didn’t receive any email notifications.I also can’t seem to send a message to the previous tutor... more

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