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lapo4ka [179]
3 years ago
7

TIMED

Chemistry
2 answers:
zhannawk [14.2K]3 years ago
6 0
Density = mass/volume
Density = 81g/0.9cm³
Density = 90g/cm³
: )
Arlecino [84]3 years ago
4 0

Answer : The density of the sample in grams per cubic centimeter is, 90g/cm^3

Solution : Given,

Mass of unknown sample = 81 g

Volume of unknown sample = 0.9cm^3

Formula used :

\text{Density of unknown sample}=\frac{\text{Mass of unknown sample}}{\text{Volume of unknown sample}}

Now put all the given values in this formula, we get the density of unknown sample.

\text{Density of unknown sample}=\frac{81g}{0.9cm^3}=90g/cm^3

Therefore, the density of the sample in grams per cubic centimeter is, 90g/cm^3

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Are these answers correct? I’m a little unsure
Naily [24]

Answer:

yes I think that they are correct

8 0
3 years ago
The specific heat of zinc is 0.39 J/g*°C. How much energy needed to change the temperature of 34g of zinc from 22°C to 57°C. Is
Svetlanka [38]

Answer:

464.1 J absorbed.

Explanation:

Given data:

Specific heat of zinc =  0.39 J/g°C

Mass of zinc = 34 g

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Energy absorbed or released = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

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ΔT = 35°C

Q = m.c. ΔT

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Q = 464.1 J

6 0
3 years ago
Is cobalt 60 more dangerous than bananas ( potassium 40) and why ?
maxonik [38]

Answer:

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Explanation:

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7 0
3 years ago
The up and down movement of gases and liquids caused by heat transfer?
AnnZ [28]

Answer:

B.

Explanation:

The up and down movement of gases and liquids caused by heat transfer is convection.

4 0
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(02.01 MC)
Rina8888 [55]

Answer:

C. Particle size

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