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LenKa [72]
3 years ago
11

Write a chemical equation of Dr. Jeff’s demonstration using a battery to light steel wool on fire. The battery is used to allow

a current to travel through the steel wool, thus heating it up. Steel wool is made from iron (Fe).
Chemistry
1 answer:
Elis [28]3 years ago
6 0

Answer:

2Fe(s) + 3O2(g) --------> 2FeO3(s)

Explanation:

According to the question, a  battery was used  to light the steel wool by bringing the terminals very close together. When  the battery came into contact with the steel wool, current was sent out through the thin wire.  This caused the iron to heat up quite well.

Iron reacts with oxygen under these conditions as follows;

2Fe(s) + 3O2(g) --------> 2FeO3(s)

This is the chemical reaction that occurs when the steel wool is set on fire.

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Number of atoms in 5.40gB
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First, take the molar mass of B (10.81g) and divide the value you've been given by the molar mass to get moles (5.4 / 10.81). So you have .5 moles of B and then you need to convert that to atoms. To do that you must use the constant 6.022X10^23 atoms per mole. Take your moles and multiply it by that constant. Your final answer should be (3.01X10^23) atoms.

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4 years ago
An object will _____ if the weight of the liquid displaced is less than the weight of the object.
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How much energy does cameron need to add to raise the temperature of a 0.500-kg sample of silver from 200 k to 205 k? the specif
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energy to raise temperature is 590 J

Given:

mass of silver sample = 0.5 kg

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energy to raise temperature

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So, energy to raise temperature is 590 J

Learn more about Specific heat capacity here:

brainly.com/question/16559442

#SPJ4

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