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9966 [12]
3 years ago
14

Use the terms "radiation", "conduction", and "convection" to explain how a pot of water boils.

Chemistry
1 answer:
maria [59]3 years ago
4 0
Materials that conduct heat poorly (wood<span>, </span>styrofoam) are often called insulators. However, materials that conduct heat well (metals<span>, </span>glass<span>, some plastics) have no special name. The simplest conduction heat transfer can be described as “one-dimensional heat flow” as shown in the following figure.</span>
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A flask contains 0.370 mol of liquid bromine, br2. determine the number of bromine molecules present in the flask
Nana76 [90]
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4 years ago
What is the formula unit for a compound made from Li and Cl? (5 points)
Svetlanka [38]

Answer:

LiCl because the total negative charge on Cl is one.

Explanation:

Lithium has a charge of 1+ and Chlorine has a charge of 1-.

5 0
3 years ago
What does percent composition tell you about a molecule
geniusboy [140]

Percent composition of a molecule is found through the molecular formula (Mass of each element found in a single mole of the molecule ÷ total molar mass of the molecule). This tells you how much of a specific element makes up the molecule.

Also be aware that 2 molecules can have the same % composition but different formulas.

5 0
3 years ago
Read 2 more answers
Of the 20 amino acids, how many amino acids are considered essential? why are they called essential?
Karo-lina-s [1.5K]
There are nine essential amino acids for humans (histadine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine) that must come from your … food.
5 0
4 years ago
The half-life of a positron is very short. It reacts with an electron, and the masses of both are converted to two gamma-ray pho
sp2606 [1]

Explanation:

(a)   It is known that relation between energy and mass is as follows.

            E = 2 \times mc^{2}

where,    E = energy

              m = mass

              c = speed of light = 3 \times 10^{8} m/s

As it is given that mass is 9.109 \times 10^{-31} kg. So, putting the given values into the above formula as follows.

             E = 2 \times mc^{2}

                       = 2 \times 9.109 \times 10^{-31} kg \times 3 \times 10^{8}m/s

                       = 1.638 \times 10^{-13} J

Therefore, we can conclude that the energy produced by the reaction between one electron and one positron is 1.638 \times 10^{-13} J.

(b) When gamma ray photons are produced then they will have the same frequency. Relation between energy and frequency is as follows.

                    E = h \times \nu   ..... (1)

where,     h = plank's constant = 6.626 \times 10^{-34} J.s

              \nu = frequency

Also,     E = 2 \times mc^{2} ........ (2)

Hence, equating equations (1) and (2) as follows.

                    h \times \nu = 2 \times mc^{2}        

So,    

6.626 \times 10^{-34} Js \times \nu = 1.638 \times 10^{-13} J

                           \nu = 1.236 \times 10^{20} Hz

Thus, we can conclude that the frequency is 1.236 \times 10^{20} Hz.

5 0
4 years ago
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