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Liono4ka [1.6K]
3 years ago
10

Which of these best show a physical change?​

Chemistry
1 answer:
Angelina_Jolie [31]3 years ago
6 0

Answer:

D

Explanation:

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Automobile catalytic Converters use a platinum callus to reduce air pollution by changing emissions such as carbon monoxide CO2
natka813 [3]

Answer:

14 mol O₂

Explanation:

The reaction between CO and O₂ is the following:

CO + O₂ → CO₂

We balance the equation with a coefficient 2 in CO and CO₂ to obtain the same number of O atoms:

2CO + O₂ → 2CO₂

As we can see from the balanced equation, 1 mol of O₂ is required to react with 2 moles of CO. Thus, the conversion factor is 1 mol of O₂/2 mol CO. We multiply the moles of CO by the conversion factor to calculate the moles of O₂ that are required:

28 mol CO x 1 mol of O₂/2 mol CO = 14 mol O₂

6 0
2 years ago
Perform the following steps to successfully complete this activity:
torisob [31]

Answer:

answer is c yes I sure is c

3 0
2 years ago
The properties of each state of a substance are due largely to the degree (amount) of intermolecular bonding.
Viktor [21]

Answer:

true

Explanation:

5 0
3 years ago
Read 2 more answers
Which elements are abundant in visible universe
quester [9]

Hydrogen is the most abundant element in the Universe; helium is second. However, after this, the rank of abundance does not continue to correspond to the atomic number; oxygen has abundance rank 3, but atomic number 8. All others are substantially less common.

HOPE THIS HELPED <3

5 0
3 years ago
Why is the separation of mixtures into pure or relatively pure substances so important when performing a chemical analysis?
N76 [4]

Answer:

It is important to separate mixture into pure or relatively pure substances when performing a chemical analysis SO AS TO KNOW THE PROPERTIES COMING FROM EACH PART MIXTURE WHICH MAY INTERFERE WITH THE SEPARATION.

Explanation:

In chemistry, Mixture is the combination of two or more substances which are not combine chemically.

Mixture contain different substances with different physical and chemical properties.

It is important to purify the substances in a mixture so as to identify what properties are coming from each mixture and also some part of the mixture can interfere with the properties of other mixture present for skewing analysis.

3 0
3 years ago
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