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Roman55 [17]
3 years ago
8

A gas cylinder contains exactly 15 moles of oxygen gas (O2) how many molecules of oxygen are in a cylinder

Chemistry
2 answers:
butalik [34]3 years ago
8 0
When you say mhello les do uou mean moecules
Tanzania [10]3 years ago
3 0
The answer is 9.03 × 1024<span> molecules hope it helps.</span>
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Which of the following is a chemical change? Explain your reasoning: (a) boiling canned soup; (b) toasting a slice of bread; (c)
schepotkina [342]

Answer:

(d) burning a log.

(b) toasting a slice of bread;

Explanation:

Chemical change -

A chemical change refers to , the change in which a new compound is formed .

From the question ,

  • boiling canned soup ,

Its is not a chemical process , since no new compound is formed , these is only change in state as the liquid is turning to gaseous sate .

  • Chopping a log ,

It is not a chemical process , as no new substance is formed .

  • toasting a slice of bread

It is a chemical change , in which bread surface is deposited by a brown coat via the process of heating , even this process is a irreversible in nature .

  • burning of log ,

It is a chemical change , as with the help of heating , the wood is turning to ashes .

6 0
3 years ago
HELP ASAP!!!
Alborosie

Answer:

The law of conservation of mass states that mass cannot be created or destroyed only transfered. So when a size change takes place the mass is being transfered into something else. During a state change the mass is being transfered into another state of matter. When a substance dissolves into another liquid the mass is still their just into another state.

Explanation:

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2 years ago
What is the total number of valence electrons in the lewis structure of xeo4?
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Here is a picture of which shows you how many valence electrons are in the Lewis structure of xeo4

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