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Lady_Fox [76]
4 years ago
5

An atom has equal numbers of​

Chemistry
2 answers:
puteri [66]4 years ago
5 0
It has an equal number of electrons and protons. Hope that helps!
Serga [27]4 years ago
5 0

Answer:

An atom has equal numbers of protons and electrons.

Explanation:

When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.

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What is the density of marble that has a mass of 4.3 g and a volume of 2.7 cm?
KiRa [710]

Explanation:

density(d) = mass(m) × volume(v)

given:

mass = 4.3 g = 0.0043 Kg

volume = 2.7 cm³ = 0.027 m³

= 0.0043 Kg / 0.0027 m³

= 0.15 Kg/m³

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a unit of heredity responsible for determining some characteristics which is transferred from a parent to offspring​
Ludmilka [50]

Answer:

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3 0
3 years ago
Determine the concentration of nh3(aq) that is required to dissolve 743 mg of agcl(s) in 100.0 ml of solution. the ksp of agcl i
AnnyKZ [126]

Answer:

1.1 M

Explanation:

The dissociation of AgCl_{(s)} is as follows:

AgCl \leftrightharpoons Ag^+_{(aq)}+Cl^-_{(aq)}

Given Value for K_{sp} = 1.77*10^{-10}

The equation for the reaction for the formation of complex ion Ag(NH_3)^+_2 is :

Ag^+_{(aq)}    +     2NH_3_{(aq)} \rightleftharpoons Ag(NH_3)_2^+_{(aq)}

The value of K_f = 1.6*10^7

If we combine both equation and find the overall equilibrium constant will be:

AgCl \leftrightharpoons Ag^+_{(aq)}+Cl^-_{(aq)}

Ag^+_{(aq)}    +     2NH_3_{(aq)} \rightleftharpoons Ag(NH_3)_2^+_{(aq)}

<u>                                                                                                      </u>

AgCl_{(s)}+2NH_3_{(aq)} \rightleftharpoons Ag(NH_3)_2^+_{(aq)} + Cl^-_{(aq)}

                                 K = (1.77*10^{-10})(1.6*10^7)

                                  K = 0.00283

If [NH_3] = x M

The solubility of  AgCl_{(s)} in the NH_3 solution will be:

x = 743*10^{-3}g * \frac{mol AgCl}{143.32g}*\frac{1}{0.1000L}

x = 0.0518 M

Constructing an ICE Table; we have :

                             AgCl_{(s)} + 2 NH_3{(aq)} \rightleftharpoons Ag(NH_3)_2^+_{(aq)} + Cl^-_{(aq)}

Initial  (M)                                     x                   0                      0

Change  (M)                       -2 (0.0518)      + 0.0518          + 0.0518

Equilibrium (M)                    x - 0.1156          0.0518             0.0518

Equilibrium constant;

(K) = \frac{[Ag(NH_3)_2^+][Cl^-]}{[NH_3]^2}

0.00283 = \frac{(0.0518)^2}{(x-0.1156)^2}

0.00283 = (\frac{0.0518}{x-0.1156})^2

x = 0.1156 + \sqrt{\frac{0.0518^2}{0.00283} }

x = [NH₃] =  1.089 M

[NH₃] ≅ 1.1 M                

8 0
3 years ago
Losing 50 dollars may affect one's level of happiness more than winning 50 dollars. This illustrates the concept of aversion
lana [24]

Answer:

B.preference

Explanation:

B.

preference

4 0
3 years ago
Solving and balancing chemical equations
Rufina [12.5K]
Those are your answer i don’t know what 6 is though sorry. Have a good day

3 0
3 years ago
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