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2 years ago

Select the atom that will attract the electron pair (:) more strongly (the atom with the greater electronegativity)

Chemistry

1 answer:

masha68 [24]2 years ago

5 0

24. F:H :) because Fluorine is the most electronegative

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What does the mass number of an atom represent?.

mamaluj [8]

Answer:

the sum of the numbers of protons and neutrons present in the nucleus of an atom.

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2 years ago

The highest tides of the year are neap tides. True False

just olya [345]

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4 years ago

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What makes the great pyramid unusual among the places on antipater’s list?

Brut [27]

Answer : It is only one of those ancient sights which still exist and gives ancient antiquity to the great pyramid in Egypt. It is believed that the pyramids are the definition of prayers that still remains in the heart of the local people.

It is also one of seven wonders of the world that is under world heritage. Pyramids where only found in Egypt and nowhere else.

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4 years ago

a vehicle accelerates with 0.4 m/s. calculate tue time taken by the vehicle to increase its speed from 20m/s to 40m/s.

Grace [21]

Answer:

$\huge\boxed{\sf t = 50 \ seconds}$

Explanation:

<h3><u>Given data:</u></h3>

Acceleration = a = 0.4 m/s²

Initial Speed = $V_i$ = 20 m/s

Final Speed = $V_f$ = 40 m/s

<h3><u>Required:</u></h3>

Time = t = ?

<h3><u>Formula:</u></h3>

$\displaystyle a =\frac{V_f-V_i}{t}$

<h3><u>Solution:</u></h3>

Rearranging formula for t

$\displaystyle t =\frac{V_f-V_i}{a} \\\\t = \frac{40-20}{0.4} \\\\t = \frac{20}{0.4} \\\\\boxed{t = 50 \ seconds}\\\\\rule[225]{225}{2}$

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2 years ago

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The theoretical yield of ammonia in an industrial synthesis was 550 kg, but only 480 kg was obtained. What was the percentage yi

Klio2033 [76]

We know that when calculating percent yield, we use the equation:

$Percent yield=\frac{Actual yield (A)}{Theoretical yield (T)}$

Since the quantities that we are given in the question are equal, we can just directly divide them to find percent yield:

$Percentyield=\frac{480kg}{550kg} =0.8727*100=87.27$

So now we know that the percent yield of the synthesis is 87.27%.

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4 years ago