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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.

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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?

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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.

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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

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Chemistry

1d

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

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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?

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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

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Chemistry

1d

Calculate the heat involve 2.0g of (NaOH) undergoes a temperature change of 20°c

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Chemistry

3d

The combustion of propane may be described by the chemical equation C3H8(g)+5O2(g)⟶3CO2(g)+4H2O(g) How many grams of O2(g) are needed to completely burn 80.5 g C3H8(g)?

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Chemistry

4d

There are 2.45 moles of gas at a pressure of 38.4 atm and a temperature of 401 K. What id the volume

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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

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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

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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

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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

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Chemistry

5d

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

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Chemistry

6d

How many grams of \textrm{Ag}_2 \textrm{O} are required to produce [var:O2] L oxygen gas via decomposition at 102.3 kPa and 175°C? 2

2Ag2O=4Ag+O2

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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?

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Chemistry

6d

Are claw machines an example of high entropy? explain

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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

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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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Chemistry

7d

How many grams of sodium sulfate will be formed if you start with 5 moles of sodium hydroxide?

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Chemistry

7d

How many moles of sodium react with 25g of chlorine to produce sodium cholorine?

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Chemistry

7d

Pb(SO4)2 + 4 LiNO3 -> Pb(NO3)4 + 2 LiSO4. How many moles of Lithuim nitrate will be needed to make 250g of Lithuim sulfate?

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Chemistry

7d

Use the following equations: Fe2O3 + 3 H2 -> 2 Fe + 3 H20 How many grams of iron can be made from 0.103 moles of Fe2O3

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Chemistry

7d

How many moles of rust iron (lll) oxide are produced when 15g of iron reacts with enough oxgen?

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Chemistry, Acid Base Titration

Hess' Law Chemistry

Chemistry question

Chemistry question

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

Chemistry question

Chemistry question

Calculate the heat involve 2.0g of (NaOH) undergoes a temperature change of 20°c

The combustion of propane may be described by the chemical equation C3H8(g)+5O2(g)⟶3CO2(g)+4H2O(g) How many grams of O2(g) are needed to completely burn 80.5 g C3H8(g)?

There are 2.45 moles of gas at a pressure of 38.4 atm and a temperature of 401 K. What id the volume

Determine the empirical formula and the molecular formula for Ibuprofen.

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

What mass of aluminum hydroxide is produced?

limiting reactant

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

How many grams of \textrm{Ag}_2 \textrm{O} are required to produce [var:O2] L oxygen gas via decomposition at 102.3 kPa and 175°C? 2

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?

Are claw machines an example of high entropy? explain

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

Requesting a tutoring session

How many grams of sodium sulfate will be formed if you start with 5 moles of sodium hydroxide?

How many moles of sodium react with 25g of chlorine to produce sodium cholorine?

Pb(SO4)2 + 4 LiNO3 -> Pb(NO3)4 + 2 LiSO4. How many moles of Lithuim nitrate will be needed to make 250g of Lithuim sulfate?

Use the following equations: Fe2O3 + 3 H2 -> 2 Fe + 3 H20 How many grams of iron can be made from 0.103 moles of Fe2O3

How many moles of rust iron (lll) oxide are produced when 15g of iron reacts with enough oxgen?

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