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3 years ago

Which sentence contains an error in word usage

SAT

1 answer:

slava [35]3 years ago

3 0

Answer: The answer is B, "Jon was surprised when it did not take him long to learn three cords on the guitar"

Explanation: "Cords" is a type of rope and therefore incorrect in the context of the sentence. Instead, it should be "chords" because Jon is learning to play a musical instrument, and chords refers to a group of harmonized notes used in music.

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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 an

Nuetrik [128]

The concentration of Iron in the galvanic (voltaic) cell Fe(s) + Mn²⁺(aq) ⟶ Fe²⁺(aq) + Mn(s) is 0.02297 M.

<h3>What is the Nernst Equation?</h3>

The Nernst equation enables us to identify the cell potential(voltage) in presence of non-standard conditions in a galvanic cell. It can be expressed by using the formula:

$\mathbf{E_{cell} = E_o - \dfrac{0.059}{n} \times log \dfrac{[Fe^+]}{[Mn^{2+}]}}$

where;

n = Number of electrons = 2
$\mathbf{E_o}$ = Initial voltage = 0.77 V
$\mathbf{E_{cell}}$ = Cell voltage = 0.78 V
$\mathbf{[Mn^{2+}]}$ = Manganese concentration = 0.050 M

Replacing the values into the above equation, we have:

$\mathbf{0.78 = 0.77 - \dfrac{0.059}{2} \times log \dfrac{[Fe^{2+}]}{[0.050]}}$

$\mathbf{0.78 -0.77= -0.0296\times log \dfrac{[Fe^{2+}]}{[0.050]}}$

$\mathbf{log^{-1} (-0.3378) = \dfrac{[Fe^{2+}]}{[0.050]}}$

$\mathbf{Fe^{2+} = (0.4594\times 0.050 )\ M}$

$\mathbf{Fe^{2+} =0.02297 \ M }$

Learn more about using the Nernst equation here:

brainly.com/question/24258023

6 0

1 year ago

Why was it important to expand american influence in china

sleet_krkn [62]

Answer:China was "lucrative trade markets."

Explanation:It gave a nation exclusive trade rights in a particular region of China. Helping them make a lot of money

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2 years ago

Competitive admission is mostly used by

stealth61 [152]

<span>Admission for which applications are reviewed based on academic performance, completion of rigorous coursework, and extracurricular activities. Those accepted either meet thresholds for these criteria or stand out from fellow applicants in one or more of these criteria. Competitive admission is usually used by four-year colleges.</span>

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3 years ago

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What three things should study groups do to ensure they are productive?

garri49 [273]

Sample Response: In productive study groups, members participate actively in the discussions, use good listening skills, and follow group guidelines.

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2 years ago

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Which of the following words and phrases contribute to Satanta’s assertive tone? Check the two boxes that apply. ""I shall hide

Maurinko [17]

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