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madam [21]
3 years ago
14

Which of these types of changes is a physical change?

Chemistry
1 answer:
Cloud [144]3 years ago
8 0

Answer:

answer is c

Explanation: cause there breaking it

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Which of the following is an example of qualitative
vichka [17]

Answer:

Option =C each mouse in the study has brown ears.

Explanation:

Qualitative:

Qualitative properties are those that can be only observed but not measured in numerical values. These are observed through senses: touch, sight, smell, taste and hear.

For example:

Color, odor, brittleness, taste etc.

Quantitative:

Quantitative properties can be measured in numerical values.

For example:

Melting point, boiling point, conductivity, viscosity, density, hardness and solubility.

In short we can say that qualitative is a measure of quality while the quantitative is a measure of quantity.

4 0
3 years ago
Determine how many oxygeng atoms are in 5.00 g of sample of sodium dichromate, na2cr2o7
vlada-n [284]

The number of oxygen atoms is in 5.00 g of sample of sodium dichromate, Na₂Cr₂O₇ is 1.125 x 10²³ atoms.

<h3>What is sodium dichromate?</h3>

Sodium dichromate is an inorganic compound. It is sued in tanning and mental illness.

The molar mass of sodium = 23 gm

The molar mass of Cr = 51.99 gm

The molar mass of oxygen = 16 gm

Molar mass of Na₂Cr₂O₇ = 2(23) + 2(51.99) + 7(16) = 261.98 gm

Number of moles in 7 gm = mass / molar mass = 7 / 261.98 = 0.0267 moles

1 mole of  Na₂Cr₂O₇ contains 7 moles of oxygen, therefore:

The number of moles of oxygen in 0.0267 moles = 0.0267 x 7 = 0.1869 moles

Thus, the number of atoms = 0.1869 x 6.02 x 10^23 = 1.125 x 10²³ atoms.

To learn more about sodium dichromate, refer to the link:

brainly.com/question/1444529

#SPJ4

6 0
2 years ago
PLEASE HELP!!!!!!!
Anna11 [10]

Answer:

i think 30

Explanation:

5 0
2 years ago
What do green plants capture from the sun?
Elodia [21]

Answer:

light energy

Explanation:

Plants use the energy from the sun to photosynthesize and  make food

hope this helps :)

8 0
3 years ago
For the following, convert the word equation to a formula equation, BUT DO NOT BALANCE
Luden [163]

its d dude this is so easy

7 0
2 years ago
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