25,963 Answered Questions for the topic chemistry

Chemistry

04/09/23

My Tutor Did Not Show Up
Hey, I had a tutoring session at 9:00 AM but the tutor never joined the call. Will I be billed for this session? How can I report that this happened?
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04/09/23

Name two advantages that induced pluripotent stem cells seem to have relative to embryonic stem cell.
Name two advantages that induced pluripotent stem cells seem to have relative to embryonic stem cell.
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04/09/23

Why did Dolly the sheep end up looking like the sheep that "donated" the udder cell rather than the sheep that donated the egg?
Why did Dolly the sheep end up looking like the sheep that "donated" the udder cell rather than the sheep that donated the egg?
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Chemistry

04/08/23

40.0 mL of 0.200 M benzoic acid is titrated with 0.200 M NaOH (aq). What is the pH...

a) of the acid solution initially? my answer: pH = 0.699b) of the acid solution halfway to the equivalence point? my answer: pH = 1.18c) 5.0 mL before the equivalence point? my answer: pH = 1.00d)... more
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Chemistry

04/08/23

Chemistry (Empirical Formula)
Magnesium metal is burned in the presence of atmospheric oxygen to form magnesium oxide.Mass Mg: 0.1773 gMass after reaction: 0.2901 gUsing the given data, calculate the stoichiometric ratio of... more
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Chemistry

04/08/23

Question about state symbols
Question: Q1. What is the difference between aqueous and liquid?Also, how do we determine the state symbols when writing a chemical equation?
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Chemistry Science Act Science

04/07/23

Chemistry: half reaction problem
How much of H2SO4 will be produced after oxydizing 2 kg of pyrite FeS2, which has mass part of iron sulfide of 95.2%.Subsequently, how many litres of 5 mol/l KOH do we need to neutralize the... more
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Chemistry Science Act Science

04/07/23

Chemical reaction problem
A piece of CaCO3 is put into a 1 litre (l) of 1.1 mol/l HCl solution. After whole CaCO3 dissolved, 10 ml of the resulting solution was being titrated with 1.08 mol/l NaOH solution. 1.69 ml of NaOH... more
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Chemistry

04/07/23

50.0 mL of 0.100 M KOH (aq) is titrated with 0.100 M HNO3 (aq). What is the pH... a) initially? b) halfway to the equivalence point? c) at the equivalence point? d) 1 mL past the equivalence point?
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Chemistry

04/06/23

Chemistry Problem Help
Briefly explain how the pH of a 3.0 M solution of K 2 SO 3 should compare to that of a 3.0 M solution of Rb2 SO 3
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Chemistry

04/06/23

Confused about this problem

Hydrazine (N2H4) is one of the combustible components in rocket fuel and also behaves as a monoprotic base with a 𝐾𝑏 = 1.3 × 10^-6 A researcher tries to characterize rocket fuel by identifying the... more
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Chemistry

04/06/23

Predict whether a precipitate will form upon mixing 75.0 mL of NaOH solution with pOH of 2.58 with 125.0 mL of a 0.018 M MgCl2 solution.
I know how to tell whether a precipitate will form, and there is one for this specific reaction. Yet, I am having trouble calculating the Q and Ksp value in order to compare them to each other. I... more
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Chemistry

04/06/23

Chemistry Question help
Given that k is 0.0110 M^-1 s^-1and the [A] is 0.1000 M, determine the rate for this reaction based on the rate law determined. This is for second order reaction
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Chemistry

04/06/23

I need some help on this question, i dont quite understand

If 1.70 g of Nitrogen react with 1.09 g of hydrogen to produce ammonia, what is the limiting reactant and what mass of ammonia is produced?a. Hydrogen is the limiting reactant and 0.22g of ammonia... more
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Chemistry

04/06/23

I need some chemistry help,. I dont understand this question
How many sodium ions are present in 325 mL of 0.850 M Na2SO4?a. 5.12 x 10^23 Na ionsb. 8.32 x 10^22 Na ions c. 1.02 x 10^24 Na ions d. 3.33 x 10^23 Na ionsAnything will help!!!
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Chemistry

04/06/23

Need some chem help please

How much 1.20 M NaOH will be needed to neutralize 225 mL of 3.0 M H2SO4(aq) ?a. 0.045 Lb. 0.28 Lc. 0.56 Ld. 0.90 Le. 1.1 Lanything will help!
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Chemistry

04/06/23

Need Some Chemistry Help

What is the amount of H+ (aq) ions in 25.0 mL of 0.200 M hydrochloric acid?a. 5.00 molb. 25.0 molc. 0.200 mold. 5.00 mmol e. 25.0 mmol
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Chemistry

04/06/23

Step by step homework ASAP
What would be the concentration of hydroxide ions in a solution made by dissolving 10.0 g of sodium hydroxide in a solution with a final volume of 150.0 mL
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Chemistry

04/06/23

For the electrochemical cell 2 Al(s) + 3 Mn²⁺(aq) ⟶ 2 Al³⁺(aq) + 3 Mn(s) (E° = 0.48 V, [Al³⁺] = 1.0 M), which of the following concentrations of Mn²⁺ would cause an increase in E for the cell?
For the electrochemical cell 2 Al(s) + 3 Mn²⁺(aq) ⟶ 2 Al³⁺(aq) + 3 Mn(s) (E° = 0.48 V, [Al³⁺] = 1.0 M), which of the following concentrations of Mn²⁺ would cause an increase in E for the cell?
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Chemistry

04/06/23

For the electrochemical cell 2 Al(s) + 3 Mn²⁺(aq) ⟶ 2 Al³⁺(aq) + 3 Mn(s) (E° = 0.48 V, [Al³⁺] = 1.0 M), what is the value of E when [ Mn²⁺] = 0.050 M? Assume T is 298 K
For the electrochemical cell 2 Al(s) + 3 Mn²⁺(aq) ⟶ 2 Al³⁺(aq) + 3 Mn(s) (E° = 0.48 V, [Al³⁺] = 1.0 M), what is the value of E when [ Mn²⁺] = 0.050 M? Assume T is 298 K
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Chemistry

04/06/23

Stuck on chemistry homework problem

How many moles of magnesium bromide would you need to add to 65 mL of water to make a 1.5 M solution?
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Chemistry

04/06/23

For the galvanic (voltaic) cell Fe(s) + Mn²⁺(aq) ⟶ Fe²⁺(aq) + Mn(s) (E° = 0.77 V at 25 °C), what is [Fe²⁺] if [Mn²⁺] = 0.050 M and E = 0.78 V? Assume T is 298 K
For the galvanic (voltaic) cell Fe(s) + Mn²⁺(aq) ⟶ Fe²⁺(aq) + Mn(s) (E° = 0.77 V at 25 °C), what is [Fe²⁺] if [Mn²⁺] = 0.050 M and E = 0.78 V? Assume T is 298 K
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Chemistry

04/06/23

What is the cell potential for this cell at 25 °C when [Zn²⁺] = 0.0143 M and [Cr³⁺] = 0.1556 M?
Consider a galvanic electrochemical cell constructed using Cr/Cr³⁺ and Zn/Zn²⁺ at 25 °C. The following half-reactions are provided for each metal: Cr³⁺(aq) + 3 e⁻ → Cr(s) E°red = -0.744 V Zn²⁺(aq)... more
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Chemistry

04/05/23

Stuck on chemistry homework problems

What would be the concentration of hydroxide ions in a solution made by dissolving 10.0 g of sodium hydroxide in a solution with a final volume of 150.0 mLHow many moles of magnesium bromide would... more
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Chemistry

04/05/23

What ratio of CH₃NH₂ to CH₃NH₃⁺ is needed to prepare a pH 10.00 buffer? (Kb for CH₃NH₂ is 4.4 × 10⁻⁴)
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