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VMariaS [17]
3 years ago
8

Which of the following correctly describes a compound?

Chemistry
2 answers:
Oksi-84 [34.3K]3 years ago
7 0
I think its c, it makes sense to me to be c
statuscvo [17]3 years ago
4 0

Answer: Option (C) is the correct answer.

Explanation:

A compound is a substance that contains atoms of two or more different elements which are chemically combined together in a fixed ratio by mass.

For example, NaCl, CO_{2}, Mg(OH)_{2} etc are all compounds.

Atoms of a compound can be separated by chemical means.

Hence, we an conclude that the atoms can only combine in fixed ratios, and they can only be separated by a chemical change, correctly describes a compound.

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The elements that contain electrons in an F sublevel near the highest occupied energy level are referred to as?
Mrac [35]

inner transmission levels i took the test

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3 years ago
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A 248-g piece of copper is dropped into 390 mL of water at 22.6 °C. The final temperature of the water was measured as 39.9 °C.
max2010maxim [7]

Answer:

The answer to your question is: Initial temperature of copper = 67.1°C

Explanation:

Data

mass Copper = 248 g

volume Water = 390 ml

T1 water = 22.6°C

T2           = 39.9°C

T1 copper = ?

Specific heat water = 1 cal/g°C

Specific heat copper = 0.092 cal/g°C

Formula       copper             water

Heat is negative for copper because it releases heat

                  - mCp(T2 - T1) = mCp(T2 - T1)                  

                  - (248)(39.9 - T1) = 390 (1)((39.9 - 22.6)           Substitution

                 -9895.2 + 248T1 = 390(17.3)                             Simplification

                 -9895.2 + 248T1 = 6747

                 248 T1 = 6747 + 9895.2

                 248 T1 = 16642.2

                 T1 = 16642.2 / 248

                 T1 = 67.1 °C                                                         Result

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Tellurium is a period 5 chalcogen. Selenium is a period 4 chalcogen. If the only factor affecting ionization energies was the nu
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Answer:

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Explanation: took quiz

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Answer:

heyy do you got the answer? i got that cuestion but i need the answer!!! did you finally get it?

Explanation:

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A sample of basalt has smaller crystals than a sample of granite. What is the most likely reason for this?
posledela
The most likely reason is that basalt is an extrusive rock, while granite is an intrusive rock. What this means is that basalt forms at the surface of the earth, where temperatures are cooler. Because of the cooler external temperature, basalt cools relatively quickly, and there isn't as much time for mineral crystals within the rock to align to form larger crystals while the rock is cooling. Granite, on the other hand, forms below the surface of the earth, where temperatures are significantly higher. Therefore, it doesn't cool as quickly, and the minerals within granite have more time to form larger crystals and the rock cools.
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