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svp [43]
3 years ago
14

The image shows copper wire coiled around an iron nail and connected to a battery to create an electromagnet. Which will increas

e the strength of this electromagnet? A. adding another battery to the circuit B. using a larger switch C. using a larger nail D. using a battery with lower voltage
Chemistry
1 answer:
Ulleksa [173]3 years ago
8 0
A is the correct answer and this question should be in physics not chemistry
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How many moles of hydrogen molecules (h2) are present in 9 x 1023 molecules of hydrogen?
Marta_Voda [28]
Hello

So the molar mass of a Hydrogen molecule is 2. If you have 10 grams of Hydrogen molecules, you have 5 moles<span> of Hydrogen molecules (10 moles of Hydrogen atoms). Avogadro's number is 6.0225x10^23. This means that </span>one mole<span> of a substance has that many particles.
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Have a nice day 
7 0
3 years ago
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3.) Plants make food through photosynthesis, and photosynthesis takes place mostly in plant in plant leave, but when plants lose
kati45 [8]

Answer:

B

Explanation:

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3 years ago
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What is the formula for Dicarbon trioxide
Veronika [31]

Answer:

diboron trioxide Formula: B 2 O 3 Molecular weight: 69.620 CAS Registry Number: 1303-86-2

Explanation:

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4 0
3 years ago
`Remember that an acid is something that donates hydrogen ions. So, when considering the formula HC2H3O2 (acetic acid), which of
tiny-mole [99]

Answer:

The H in the carboxyl group.

Explanation:

Acetic acid can be written as CH₃COOH, where -COOH is the functional group carboxyl, responsible for the acidity of organic acids. The H in the carboxyl group is the one that is donated in the acid reaction.

CH₃COOH(aq) + H₂O(l) ⇄ CH₃COO⁻(aq) + H₃O⁺

Acetic acid is a weak acid, so just a small fraction of the molecules undergo this reaction to donate their hydrogen.

5 0
3 years ago
A battery can provide a current of 4.60 A at 3.40 V for 2.50 hr. How much energy (in kJ) is produced? 1st attempt kJ Energy
Lunna [17]

Answer:

The energy produced equals 140.760 kJ

Explanation:

The relation between power, current and voltage is

Power=Current\times Voltage

Applying the given values in the relation above we get

Power=4.60\times 3.40=15.64W

Now Since Power=\frac{Energy}{Time}\\\\Energy=Power\times Time

Again applying the calculated values we get

Energy=15.64\times 2.50\times 3600=140760Joules=140.76kJ

4 0
4 years ago
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