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3 years ago

What is one difference between a mixture and a compound?

Chemistry

2 answers:

tekilochka [14]3 years ago

5 0

D. a compound can only be separated into its components by chemical means

Dovator [93]3 years ago

3 0

That is the answer to your question

A. compound can only be separated into its components by chemical means.

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14. In groups, students create dioramas to depict different ecosystems and their physical characteristics. One of the dioramas i

Lena [83]

The answer would be E, it shows students how the different environments appear, since you can visually see it.

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3 years ago

What is the most likely charge on an ion formed by an element with a valence electron configuration of ns2np4

Andreas93 [3]

Answer:

Explanation:

For an element to be stable, it must follow the octet rule: an atom will gain, lose or share electrons until its valence shell is complete with 8 electrons.

An element with the valence electron configuration ns²np⁴ has 6 (2+4) electrons in its valence shell. Thus, in order to fulfill the octet, it will gain 2 electrons. As a consequence, it will form an anion with charge 2-.

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2 years ago

Allen is carrying out reactions in a lab. One of the products in all reactions is found to be either a precipitate, a gas, or wa

vampirchik [111]

Here are some examples for those type of reactions.

Combustion reaction: CH4(g) + 2 O2(g) --> CO2(g) + 2 H2O(l)

Decomposition reaction: CaCO3(s) ---> CaO(s) + CO2(g)

Double replacement: AgNO3(aq) + NaCl(aq) ---> AgCl(s) + NaNO3(aq)

One common thing in all is that they are reactions. They have reactants to form new substances called product.

4 0

2 years ago

Read 2 more answers

Of the following substances, ________ has the highest boiling point. Of the following substances, ________ has the highest boili

kolezko [41]

Answer:

Of the following substances, PCl₃ has the highest boiling point

Explanation:

The given substances and their boiling point from online resources are;

Krypton, Kr, boiling point = -153.4°C

Chlorine gas, Cl₂, boiling point = -34.6°C

Borane, BH₃, (transient compound), boiling point of the dimer it forms B₂H₆ = -164.85°C

Methane, CH₄, boiling point = -161.6°C

Phosphorus trichloride, PCl₃, boiling point = 76.1°C

Therefore, given that PCl₃ is a volatile liquid at room temperature, while the other substances are gases and that PCl₃ has the highest boiling point of all the substances of 76.1°C, the substance with the highest boiling point is PCl₃.

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2 years ago

Which sentence best describes the relationship between chlorophyll and the chloroplast?

Viktor [21]

Answer:

chlorophyll is a chemical found in a chloroplast

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3 years ago