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mr_godi [17]
3 years ago
11

An industrial chemist is studying a sample of an unknown metal. Describe two ways he could change the metal physically and two w

ays he could change the metal chemically to try to identify it.
Chemistry
2 answers:
Morgarella [4.7K]3 years ago
6 0

Heat the metal until it melts (physical change).


Attempt to react the metal with oxygen (chemical change).


Stretch the metal into a wire (physical change).


Attempt to react the metal with acid (chemical change).


Vitek1552 [10]3 years ago
5 0
Physical: slicing or cutting and painting it with a different color

Chemical: rusting
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Answer:

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How many helium atoms are there in a helium blimp containing 539kg of helium
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Dilute 0.407M & 2.56L solution to 7.005L. CF?
Alenkinab [10]

Answer:

C₂ = 0.149 M

Explanation:

Given data:

Initial concentration = 0.407 M

Initial volume = 2.56 L

Final volume = 7.005 L

Final concentration = ?

Solution:

Formula:

C₁V₁ = C₂V₂

C₁ = Initial concentration

V₁ = Initial volume

C₂ = Final concentration

V₂ =Final volume

Now we will put the values.

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C₂ = 1.042 M.L / 7.005 L

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5 0
3 years ago
If lung problems like emphysema occur, the blood ph of the patient is expected to ________.
skelet666 [1.2K]
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3 0
3 years ago
One cup of kidney beans contains 15 g of protein, 1 g of fat, and 42 g of carbohydrate. how many kilocalories, to two significan
ollegr [7]
 we need to get the total calories, we can get it by getting the average of calories of the protein, fat, and carbohydrates:
calories of protein = 15g x 4 KCal/g
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calories of fat = 1 g x 9 KCal/g
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calories of carbohydrates = 42 g x 4 KCal/g 
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∴ the total calories = 60 + 9 + 168 = 237Kcal = 0.237 Cal
to get the resualt to two significant figures 
∴ the resault is = 0.24 Cal = 240 KCal

4 0
3 years ago
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