Answer:
Why is copper used for most electrical wiring? All metals have some amount of resistivity to electrical currents, which is why they require a power source to push the current through. The lower the level of resistivity, the more electrical conductivity a metal has
<span>NO2 weighs 46.005 grams per mol. There are 6.02x10^23 molecules in a mol. In the given sample of 189.5 grams, there are 4.12 mols. This means that there are 2.48x10^24 molecules of NO2 in the given sample.</span>
Answer:
It's obviously <em><u>LIGHT</u></em><em><u> </u></em><em><u>ENERGY</u></em><em><u> </u></em><u>for</u><u> </u><u>me</u><u> </u><u>cuz</u><u> </u><u>it's</u><u> </u><u>from</u><u> </u><u>the</u><u> </u><u>flashl</u><u>ight</u><u>.</u><u>.</u>
Explanation:
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Temperature, that's the most important factor
The standard enthalpy of reaction should be negative.
<h3>What is enthalpy?</h3>
A thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume.
Inside the heat pack are two chemicals that get mixed when you smush them together. As they mix, some weak bonds are broken, which takes a little bit of energy. But new, stronger bonds form which release energy. Releasing that energy causes the surroundings to heat up.
Hence, option B is correct.
Learn more about enthalpy here:
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