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Mars2501 [29]
4 years ago
15

A cube of copper metal has a density of 8.96 g/cm3. The cube has a mass of 29.54 g. The atomic radius of a copper atom is 1.28 a

ngstroms. How many atoms is the cube of copper metal?
Chemistry
1 answer:
hichkok12 [17]4 years ago
8 0

Answer:

The answer to your question is:  3.745 x 10 ²³ atoms

Explanation:

Data

density = 8.96 g/cm³

mass = 29.54 g

atomic radius = 1.28 A° 1.28 x 10⁻¹⁰ m

Volume of a cube

                              density = mass / volume

                              volume = mass / density

                              volume = 29.54 / 8.96

                              volume = 3.29 cm³

Volume of a copper atom

                              volume = (4/3) πr³

                              volume = (4/3) π (1.28 x 10 ⁻⁸)³

                                           = 8.784 x 10 ⁻²⁴ cm³

Number of atoms = 3.29 cm³ / 8.784 x 10 ⁻²⁴ cm³

                             = 3.745 x 10 ²³ atoms

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netineya [11]

Answer:

The α‑helix is held together by hydrogen bonds between the amide N−H and C=O groups.

Disulfide bonds stabilize secondary structure.

Explanation:

Proteins have primary, secondary, tertiary and quartinary structures.

The secondary structure of a protein is the regular, recurring sequence of amino acid in a polypeptide chain. Secondary structure of proteins give rise to the folding observed in the structure of a protein.

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7 0
3 years ago
¿Por qué los hongos no producen su propio alimento?
Vlada [557]

Answer:

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Explanation:

8 0
3 years ago
Which list includes three forms of energy?
loris [4]
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5 0
3 years ago
Read 2 more answers
A 13 Ohm resistor, R, is connected to a battery with unknown voltage, V, as shown below. The total current, I, flowing through t
wlad13 [49]

Answer:

16.12 V

Explanation:

Ohms law explains or portrays the relationship between the voltage (V), current (I) and resistance (R). This is represented using the equation as follows:

V = IR

Where;

V = voltage (Volts)

I = current (amperes)

R = resistance (ohms)

According to the information provided in the question, resistance (R) = 13 Ohm, current (I) = 1.24 Amperes, V = ?

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3 0
3 years ago
At what temperature will 5 g of Cl2 exert a pressure of 900 mmHg at a volume of .75 L?
katovenus [111]

The temperature : 154.73 K

<h3>Further explanation</h3>

Given

mass = m = 5 g of Cl2

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V = 0.75 L

Required

Temperature

Solution

mol Cl2 = mass : MW = 5 : 71 = 0.07

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P = pressure, atm  

V = volume, liter  

n = number of moles  

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Input the value :

T = 1.18421 x 0.75 / 0.07 x 0.082

T = 154.73 K

3 0
3 years ago
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