CHEMISTRY MIDDLE SCHOOL

Convert to volume:
3.01 x 1023 molecules of SO2​

Answers

Answer 1
Answer:

Answer:11.19 L of SO2

Explanation:use the dimensional analysis chart and you multiply 3.01 times 10^ 23 by 22.4 then take that answer and divide by 6.022 times 10^ 23

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Where are coefficients located

Answers

A coefficient is the number that comes before a variable in a term. Examples include...

4x
5b
17y
A coefficient comes before the variable. For example, in 5x, the number 5 is the coefficient because it appears before the variable.

What does the author list in the passage?a
scientists who study electromagnetic radiation
b
different types of electromagnetic spectrums
c
different types of electromagnetic radiation
d
the differences between radio waves and microwave

Answers

Answer:

B --> Different types of electromagnetic radiation

Explanation:

Science tells us that light is the reason we are able to see objects. Without light, we wouldn't be able to ... The electromagnetic spectrum is the range of all types of electromagnetic ... C x-rays. D light.

Answer:

b i think

Explanation:

An element contains only one kind of A.) particle.
B.) property
C.) protein
D.) raw material

Answers

Answer:

particle

Explanation:

if there were more than one kind of particle, it would be a compound.

Why are some examples of a chemical reaction not actually foolproof evidence that of a chemical reaction?13, 8th grade, and I'm doing my science lab report: The lab was a chemistry lab. We got a bunch of toxic chemicals and put pairs of them together, recorded the reactions, and wrote balanced equations for each of them and identified what kind of reaction they were. The whole name of the lab is "Evidence of Chemical Reactions", and one of the first analysis questions is "write a paragraph about the kinds of changes you would expect to see if a chemical reaction occurs." I answered this with things like bubble formation, change of color, change of state of matter, etc. Then the next question said "any one of these signs is not always a fool proof indication that a chemical reaction is occurring. give two examples to support this statement." 
what are two examples to support the statement that the commonly known examples of chemical reactions occurring are not always foolproof evidence that chemical reactions are occurring?

Answers

So basically, the change in color effects the amount of cations in the solution making it a physical change rather than a chemical one, defying the law of conservation of mass! I hope this helped! (The only time the change in color affects the amount of cations is in the Alkaline Earth Metals)

source: college science teacher 

Bubble formation, change of color, and change of state are not foolproof evidence of a chemical reaction due to physical changes and variations in the reactions.

While bubble formation, change of color, and change of state of matter are commonly associated with chemical reactions, they are not always foolproof evidence. Two examples to support this statement are:

  1. Physical changes can mimic some of these signs. For example, the melting of ice is a change of state, but it is a physical change rather than a chemical reaction.
  2. Some chemical reactions may not produce the expected signs. For instance, some reactions may be slow or occur at very low concentrations, making it difficult to observe noticeable changes.

Therefore, it is important to consider multiple lines of evidence and conduct further analysis to confirm the occurrence of a chemical reaction.

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Who used experiments and scientific tools to study matter?

Answers

John Dalton used experiments and scientific tools to study matter

Final answer:

Chemists and Physicists use controlled experiments and scientific tools like microscopes and spectrometers to study the chemical and physical properties of matter.

Explanation:

Scientists, particularly Chemists and Physicists, are the ones who use experiments and scientific tools to study matter. They conduct controlled experiments to investigate the physical and chemical properties of different types of matter. For instance, they utilize scientific tools such as microscopes, spectrometers, and calorimeters to measure, observe, and analyze matter at various levels. By using these tools, scientists are able to gather precise and reliable data to better understand the composition, structure, and reactions of matter.

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In terms of ecological succession,an undisturbed community tends to become __________ over time

Answers

It becomes more stable over time

Answer:

more stable

Explanation:

In terms of ecological succession, a community tends to become more stable over time.

As an ecosystem changes over time, species best adapted to that habitat tend to replace other, lesser adapted species until an equilibrium is reached. When drastic changes in the numbers and types of species cease to occur, the community has reached a climax state.
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