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quester [9]
3 years ago
15

What happens when the wire in an electromagnet is wrapped around a soft iron core?

Chemistry
2 answers:
Mazyrski [523]3 years ago
6 0

the answer to this question is A i hope this help

Gre4nikov [31]3 years ago
4 0

im not sure about this one but i think the field is spread out

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Identify the correct statement regarding the strength of chemical bonds.
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<h2>B)</h2><h2><u><em>brainlist plz</em></u></h2>

Explanation:

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Which of the following best explains why the oceanic crust is youngest at the oceanic ridges?
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CaO + H2O -&gt; Ca(OH)2
yawa3891 [41]

The % yield of Ca(OH)₂ : 62.98%

<h3>Further eplanation </h3>

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

Reaction

CaO + H₂O ⇒ Ca(OH)₂

mass CaO= 4.2 g

mol CaO(MW=56,0774 g/mol) :

\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{4.2}{56,0774 g/mol}\\\\mol=0.075

mol Ca(OH)₂ based on mol CaO

mol ratio CaO : Ca(OH)₂,= 1 : 1, so mol Ca(OH)₂ = 0.075

mass Ca(OH)₂(MW=74,093 g/mol) ⇒ theoretical

\tt mass=mol\times MW\\\\mass=0.075\times 74,093 g/mol\\\\mass=5.557~g

% yield :

\tt =\dfrac{actual}{theoretical}\times 100\%\\\\=\dfrac{3.5}{5.557}\times 100\%\\\\=62.98\%

8 0
2 years ago
Physical science:verification on newton's second law
mezya [45]

Explanation:

finally I have given you answer hope it will help you successfully

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How are the atomic number and the number of protons related to each other? how do the number of protons, number of neutrons, and
jarptica [38.1K]

The atomic number (Z) uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons.

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In this video Kristine Born explains this two concepts in more detail.

5 0
3 years ago
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