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Paladinen [302]
4 years ago
11

Which process below would be considered a chemical change?

Chemistry
2 answers:
leonid [27]4 years ago
6 0

Answer:

C. Molding of cheese.

Explanation:

Hello,

In this case, both mixing and grating of cheese are physical changes as the composition of the cheese does not change. In contrast with the aforesaid options, molding of cheese is associated with the growing metabolic process of mold as it is chemically processing the cheese to both grow and produce other types of metabolites which are quite different than the initial cheese's components.

Best regards.

fenix001 [56]4 years ago
3 0
C. Molding of cheese
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8. If 0.795 moles of ammonia gas occupies 42.5 L at 670 torr, what is the Celsius temperature?
maksim [4K]

<u>Answer:</u> The temperature in degree Celsius is 301.31°C

<u>Explanation:</u>

To calculate the temperature, we use the equation given by ideal gas, which is:

PV=nRT

P = pressure of the gas = 670 torr = 0.882 atm   (Conversion factor: 1 atm = 760 torr)

V = volume of gas = 42.5 L

n = number of moles of gas = 0.795 mol

R = Gas constant = 0.0821\text{ L atm }mol^{-1}K^{-1}

T = temperature of gas

Putting values in above equation, we get:

0.882atm\times 42.5L=0.795mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times T\\\\T=574.31K

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

T(K)=T(^oC)+273

574.31=T(^oC)+273\\T(^oC)=301.31^oC

Hence, the temperature in degree Celsius is 301.31°C

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3 years ago
1. Which of the following does NOT indicate that a chemical change may have taken place?
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<span>1. Which of the following does NOT indicate that a chemical change may have taken place?
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