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drek231 [11]
3 years ago
7

Suppose you needed to cool off 19.8 grams of water at 33.3 °C to 28 °C. Calculate the energy released in this process.

Chemistry
1 answer:
crimeas [40]3 years ago
4 0
<h2>Answer:  439.07 J</h2>

Explanation:

The energy released can be calculated using the formula Q = mcΔT; here Q is the heat energy transferred (in joules), m is the mass of the liquid being cooled (in grams), c is the specific heat capacity of the liquid (joule per gram degrees Celsius), and ΔT is the change in temperature.

since m = 19.8 g

         c  = 4.184 J/g ·°C

       ΔT = 33.3 °C - 28 °C =  5.3 °C

⇒ Q = (19.8 g) (4.184  J/g ·°C)(5.3 °C)

    Q =  439.07 J

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What is the half life of this element?<br> A. 80 days B. 40 days C. 5 days D. 10 days
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3 years ago
How many grams of perchloric acid, HClO4, are contained in 39.1 g of 74.9 wt% aqueous perchloric acid
Leno4ka [110]

Answer:

29.3 g HClO₄

Explanation:

We have 39.1 grams of 74.9 wt% aqueous perchloric acid solution, that is, there are 74.9 grams of perchloric acid in 100 grams of perchloric acid solution. The mass, in grams, of perchloric acid contained in 39.1 grams of perchloric acid solution is:

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4 years ago
A quantity that had just a number
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3 years ago
Which term names the group of organisms able to interbreed and produce fertile offspring?
vladimir2022 [97]

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Species

Explanation:

Species is the group of organisms able to interbreed and produce fertile offspring.

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"Organisms" means living thing. It can be a plant or animal like we usually think of, but it also includes the really small single-celled living things like some bacteria.

"Interbreed" means to mate with each other.

"Fertile" means that the living thing can also have babies.

"Offspring" means the children that are born.

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7 0
4 years ago
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