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Vsevolod [243]
3 years ago
15

A chemical reaction was used to separate a sample into its components. What conclusion about the sample can be formed based on t

he technique used? A.It was a pure substance. B It was a compound. C It was a heterogeneous mixture. D It was a homogeneous mixture
Chemistry
2 answers:
Vika [28.1K]3 years ago
6 0

Answer;

B It was a compound

Explanation;

A pure chemical compound is a chemical substance that is composed of a particular set of molecules or ions that are chemically bonded. Two or more elements combined into one substance through a chemical reaction, such as water, form a chemical compound.

A chemical compound can be either atoms bonded together in molecules or crystals in which atoms, molecules or ions form a crystalline lattice.  Unlike elements compounds can be broken down in chemical means.

olga_2 [115]3 years ago
3 0

Answer:

its a compound ez dubz 98 kill solo squad gameplay enjoy!

Explanation:

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sergeinik [125]

Answer:

<h2><em>no</em></h2>

Explanation:

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7 0
3 years ago
Consider the synthesis of ammonia 3 H2+ N2 à 2 NH3 If a student were to react 38.5 g of nitrogen gas, how many moles of ammonia
Wittaler [7]

Answer:

2.75 mol

Explanation:

Given data:

Mass of Nitrogen = 38.5 g

Moles of ammonia produced = ?

Solution:

Chemical  equation:

N₂ + 3H₂    →     2NH₃

Number of moles of nitrogen:

Number of moles = mass/ molar mass

Number of moles = 38.5 g/ 28 g/mol

Number of moles = 1.375 mol

Now we will compare the moles of ammonia and nitrogen from balance chemical equation.

           N₂            :            NH₃

            1              :             2

           1.375       :           2×1.375 = 2.75 mol

Thus 2.75 moles of ammonia  are produced from 38.5 g of nitrogen.

4 0
3 years ago
In the article, Invasion of the Periodical Cicadas, why do scienctists believe that cicadas only reproduce every 13 or 17 years?
frez [133]

Hi, you've asked an incomplete question. However, I assumed you are referring to the article found on the Scientific American website.

Explanation:

<em>Remember,</em> according to that article we are told that scientists notice that these insects have a long nymphal (immature form before becoming adults) stage, one that can last up to 13 to 17 years on the ground before they leave the ground looking for mating partners.

Because it is only after mating occurs at this point that their eggs are laid, that is why scientists believe that cicadas only reproduce every 13 or 17 years.

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Phoenix [80]
It will only be valuable if proved correct so it's D
7 0
3 years ago
Read 2 more answers
5678 scientific notation
natta225 [31]
Hi , the answer is 5.678 x 10^3.
6 0
3 years ago
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