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defon
2 years ago
15

What kind of a system is a coffee held in a cup??​don't spam..

Chemistry
2 answers:
trasher [3.6K]2 years ago
7 0

<h2>Open system.</h2>

Explanation:

<h3>Hope it helps you!! </h3>
bagirrra123 [75]2 years ago
3 0

Answer:

open system

Coffee held in a cup is an open system because it can exchange matter water vapors and energy heat with the surroundings.

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The ph of a fruit juice is 3.43.4. find the hydronium ion​ concentration, left bracket upper h 3 upper o superscript plus right
DENIUS [597]
PH is simply a convenient way to denote hydronium ion concentration (usually in moles per liter or molarity). pH is calculated from the given concentration using the equation:   pH  =  -log [H3O⁺]

To find [H3O+] from the given equation, we apply the antilog. 
 [H3O⁺]  =  10⁻⁽pH⁾ or ten raised to the negative value of pH
A solution with a pH of 3.43 has a hydrogen ion concentration of 3.7154x10^-4 moles per liter.
4 0
3 years ago
The sun is 150 kilometers from earth.if you wanted to explain to friend how far is what would you say
jasenka [17]

Answer:

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Explanation:

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3 years ago
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emmasim [6.3K]
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So the correct option is D.

Explanation:

If the Triangle has two sides equal, so the two angles there are equal. Also the other angle be some other definite angle. So

45+x+x=180(Considering definite angle to be 45)
2x=135
x=67.5

So there is only one solution to the triangle.
8 0
3 years ago
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Hitman42 [59]

Answer:

An ice pack uses friction and the chemicals inside make it mix to make it cold

Explanation:

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