Answer:
You can smell perfume because it diffuses into the air and makes its way into your nose.
A teabag placed in a cup of hot water will diffuse into the water.
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Answer:
The sun uses nuclear fusion reactions to generate heat.
Explanation:
It is true from the given choices that the sun uses nuclear fusion reactions to generate heat.
The heat that accompanies nuclear fusion reactions is very huge. In fact this is the source of energy for the whole solar system.
During a nuclear fusion reaction, small atomic nuclei combines to form larger ones.
This combination results in a series of chain reactions that releases energy.
Germanium. Germanium is in the same group and is also a metalloid, like silicon
The statement <span>“the hydronium ion concentration of a solution
that has a pH of 4.12 is 7.59 * 10^-9M</span>” is FALSE because the correct answer would be <span>7.6 x 10^-5 M. </span>I
am hoping that this answer has satisfied your query and it will be able to help
you in your endeavor, and if you would like, feel free to ask another question.
H2O(s) ==> H2O(l)
<span>The density of liquid H2O = 1.00 g/mL. </span>
<span>The density of ice is 0.917 g/mL. </span>
<span>Suppose we start with 1 mol (18 g) H2O(s) and it melts to the liquid. </span>
<span>As a liquid it will occupy 18g/1.00 = 18 mL. </span>
<span>As a solid it will occupy 18/0.917 = 19.63 mL. </span>
<span>19.63-18.0 = 1.63 mL diffeence. </span>
<span>The heat fusion of ice is 6.01 kJ/mol; therefore, 6.01/1.63 = about 3.69 kJ for each mL difference. </span>
<span>In this experiment we have a difference of 0.109 mL; then 3.69 kJ/mL x 0.109 mL = 0.402 kJ for 0.0657 g Zn. You want per mol Zn and you have 0.0657/65.39 = about 0.001 mol Zn so </span>
0.402 kJ/0.001 = <span>402 kJ/mol Zn</span>