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Sliva [168]
3 years ago
7

A new penny has a mass of 2.49 g and a volume of 0.349 cm3. Is the penny made of pure copper?

Chemistry
1 answer:
velikii [3]3 years ago
7 0
Yes it is. Copper is the same mass and volume. Plus all pennies are made of copper
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The volume, in liters, occupied by 2.50 moles of N2 gas.<br><br><br> calculate at STP
kondaur [170]

Answer: The volume occupied by 2.50 moles of N_2 gas at STP is 56.0L

Explanation:

According to ideal gas equation:

PV=nRT

P = pressure of gas = 1 atm (at STP)

V = Volume of gas = ?

n = number of moles = 2.50

R = gas constant =0.0821Latm/Kmol

T =temperature =273K  (at STP)

V=\frac{nRT}{P}

V=\frac{2.50mol\times 0.0821Latm/K mol\times 273K}{1atm}=56.0L

Thus the volume occupied by 2.50 moles of N_2 gas at STP is 56.0L

6 0
3 years ago
Are alchemy and chemistry the same
Anit [1.1K]

Are alchemy and chemistry the same: No

<u>Explanation:</u>

Alchemy and chemistry differ from each other. Their main difference lies in the concepts that they are based on. Alchemy has the base of viewing the reality of nature supernaturally. Chemistry has a base of viewing the reality in a natural way.

Protoscience is the name given for Alchemy. This is because that alchemy usually focuses on the traditional things like procedures and  terminologies. Chemistry always focuses on the matter and their transformations. The matter and its transformations are dealt with chemistry.

5 0
4 years ago
What is the difference between a state and a microstate of a system?
Brut [27]

Answer:

a) A microstate is a snapshot of positions and speeds at a particular instant.

b) A thermodynamic state is a single possible arrangement of the positions and kinetic energies of the molecules.

c) A thermodynamic state is a set of conditions, usually temperature and pressure, that defines the properties of a bulk material.

d) A microstate is a single possibility for all the positions and kinetic energies of all the molecules in a sample.

e) A thermodynamic state is a set of conditions, usually temperature, volume and number of moles, that defines the properties of a bulk material.

Explanation:

A state of a system in thermodynamics give the properties that a material is been made up, these properties could be pressure, temperature, volumes and others , they are been called thermodynamic property

Microstates helps us to know how molecules is been arranged in single instant. Kinetics energy as well as position of molecules in a particular substance can be known in single instant.

4 0
3 years ago
What are the common units for expressing solution concentration?
Ira Lisetskai [31]
It would be mol/dm^3 Formula of concentration: (no. of moles/volume of solution in dm^3) 1 cm^3 = 0.001dm^3 Hope this helped. :)
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3 years ago
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What does the capital letter, such as T, represent in a punnett square​
aleksklad [387]

Answer: A dominant gene.

Explanation:

4 0
3 years ago
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