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seraphim [82]
3 years ago
13

Given the balanced equation representing a redox reaction:

Chemistry
2 answers:
Margarita [4]3 years ago
6 0
<span>From the given balanced chemical reaction, it can be seen that each aluminum atom gains loses 3 electrons. Also, each copper atoms gains 2 electrons. The choice that would best give us the described scenario above is choice number 2. That is Each Al loses 3e- and each Cu gains 2e-. </span>
alisha [4.7K]3 years ago
5 0
<span>The correct answer is option (2) i.e. Each Al loses 3e- and each Cu^2+ gains 2e- When an atom X, loses an electron, it becomes, X^1+ When an atom X, loses two electrons, it becomes, X^2+ When an atom X, gains an electron, it becomes, X^1- When an atom X, gains two electrons, it becomes, X^2- So, Here, 2Al + 3Cu^2+ --> 2Al^3+ + 3Cu, When each Al, loses three electrons, it becomes, Al^3+ When each Cu^2+, gains two electrons, it becomes, Cu^2+^2- = Cu</span>
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Does a gas phase have heterogenous properties?
vladimir1956 [14]
Ordinary window, and bottle glass is homogeneous mixture. A lot of design and special art-formed glass peaces are heterogenous mixture. Like glass marble with swirls of color in it is heterogeneous mixture.) SUGAR Table sugar is a compound.
8 0
3 years ago
The element chlorine (Cl) has 17 protons and 17 electrons. What happens to an atom of chlorine (Cl) if it gains an electron?
Vesna [10]

Answer:

It becomes negatively charged

Explanation:

An atom of chlorine having equal number of protons and electrons is neutral. The protons are the positively charged particles located in the nucleus of an atom. Electrons are negatively charged particles located outside the nucleus.

When the number of electrons and protons are the same, such an atom is neutral.

If the number of protons is more, the atom becomes positively charged.

In this case, the atom adds or gains an electron making the number of electrons to go from 17 to 18. This is more than the number of protons which are 17 by 1. The charge on the atom is therefore -1.

4 0
3 years ago
Read 2 more answers
A cubic box with sides of 20.0 cm contains 2.00 × 1023 molecules of helium with a root-mean-square speed (thermal speed) of 200
Anarel [89]

Answer:

1.133 kPa is the average pressure exerted by the molecules on the walls of the container.

Explanation:

Side of the cubic box = s = 20.0 cm

Volume of the box ,V= s^3

V=(20.0 cm)^3=8000 cm^3=8\times 10^{-3} m^3

Root mean square speed of the of helium molecule : 200m/s

The formula used for root mean square speed is:

\mu=\sqrt{\frac{3kN_AT}{M}}

where,

= root mean square speed

k = Boltzmann’s constant = 1.38\times 10^{-23}J/K

T = temperature = 370 K

M = mass helium = 3.40\times 10^{-27}kg/mole

N_A = Avogadro’s number = 6.022\times 10^{23}mol^{-1}

T=\frac{\mu _{rms}^2\times M}{3kN_A}

Moles of helium gas = n

Number of helium molecules = N =2.00\times 10^{23}

N = N_A\times n

Ideal gas equation:

PV = nRT

Substitution of values of T and n from above :

PV=\frac{N}{N_A}\times R\times \frac{\mu _{rms}^2\times M}{3kN_A}

PV=\frac{N\times R\times \mu ^2\times M}{3k\times (N_A)^2}

R=k\times N_A

PV=\frac{N\times \mu ^2\times M}{3}

P=\frac{2.00\times 10^{23}\times (200 m/s)^2\times 3.40\times 10^{-27} kg/mol}{3\times 8\times 10^{-3} m^3}

P=1133.33 Pa =1.133 kPa

(1 Pa = 0.001 kPa)

1.133 kPa is the average pressure exerted by the molecules on the walls of the container.

3 0
3 years ago
How many mm are in 5 m
Alla [95]

1 meter = 1000mm

* 5

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6 0
3 years ago
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