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Alex Ar [27]
4 years ago
6

How can you determine the number of protons in the nucleus of an atom of any of the elements listed in the table?

Chemistry
1 answer:
stealth61 [152]4 years ago
6 0
The number of protons is equal to the atomic number of every element in the periodic table.
Example: The atomic number of Niobium (Nb) is 41. Therefore, the number of protons is also 41.
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Can someone help me!!
Art [367]
Idk but here something that made my day

8 0
4 years ago
[Rn] 7s25f6d4<br> Which element is denoted
Colt1911 [192]

Answer:

Explanation:

[Rn] 7s25f6d4

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4 0
4 years ago
Consider the following reaction:
rusak2 [61]

Answer:

1. a) 0,18

2. e) The reaction proceeds to the left, forming more BrCl(g).

Explanation:

1. In a gas reaction as:

2SO₂(g) +O₂(g) ⇄ 2SO₃(g)

it is possible to convert kp to kc using:

kp = kc (RT)^Δn

Where kp is gas equilibrium constant, kc is equilibrium constant (13), R is gas constant (0,082atmL/molK), T is temperature (900K), and Δn is number of moles of gas products - number of moles of gas reactants (That is 2 - (2+1) = -1). Replacing:

kp = 13×(0,082atmL/molK×900K)^-1

<em>kp = 0,18</em>

<em></em>

2. Based on Le Chatelier's principle, the change in temperature, pressure, volume, or concentration of a system will result in predictable and opposing changes in the system. For the reaction:

2 BrCl(g) ⇄ Br₂(g) + Cl₂(g).

The addition of 0,050M of each compound cause <em>the reaction proceeds to the left, forming more BrCl(g)</em> because based on the reaction, you need two moles of BrCl per mole of Br₂(g) and Cl₂(g) to keep the system in the same. But you are adding the same proportion of moles of each compound.

I hope it helps!

8 0
4 years ago
How is enthalpy used to predict whether a reaction is endothermic or exothermic? when the enthalpy of the reactants is higher th
mafiozo [28]
When the enthalpy change of the reaction is positive the reaction is endothermic
this means that the reaction is absorbing energy from the surrounding to the vessel
8 0
3 years ago
Read 2 more answers
6. A student was conducting an experiment to find the volume of a spherical metal object. He placed it in the graduated cylinder
Sergio039 [100]
<h3>Answer:</h3>

                No, it wouldn't affect the volume.

<h3>Explanation:</h3>

                         Let us suppose the masses of metal object before and after shape change to be,

                              Mass before shape change  =  2.5 g

                                Mass after shape change  =  2.5 g

As the shape change has not affected on the mass so in both states it will remain 2.5 g.

Secondly, as density will remain same for both states because it is intensive property of a particular matter and is considered a characteristic property. Hence, it will also remain constant before and after shape change. Assume the density to be 2 g.mL⁻¹.

Therefore the volume calculated will be,

Before shape change:

                                   Volume-1  =  Density × Mass

                                   Volume-1  =  2 g.mL⁻¹ × 2.5 g

                                   Volume-1  =  5 mL

After shape change:

                                   Volume-2  =  Density × Mass

                                   Volume-2  =  2 g.mL⁻¹ × 2.5 g

                                   Volume-2  =  5 mL

<h3>Conclusion:</h3>

                  The volume is not affected by changing shape. Hence, after shape change the object will be having a volume of 5 mL.

8 0
3 years ago
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