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vlada-n [284]
3 years ago
11

Which two parts of the atom are found in nucleus?

Chemistry
2 answers:
dsp733 years ago
7 0
Neutrons and protons. Hope this helps :)
faust18 [17]3 years ago
6 0

Answer:

protons and neutrons are found in nucleus

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One assumption of the ideal gas law is that the atoms or molecules themselves occupy a negligible volume. Verify that this assum
Semenov [28]

Answer:

The correct answer is 0.09 percent.

Explanation:

Based on the given information, the atomic radius is 2 × 10⁻¹⁰ m. Now the atomic volume can be determined by using the formula, 4/3πr³. by putting the values we get,  

v = 4/3πr³ = 4/3π(2×10⁻¹⁰ m)³  

v = 3.35 × 10⁻²⁹ m³

The no. of atoms present in one mole of xenon is 6.02 × 10²³ atoms. Therefore, the total atomic volume will be,  

Va = 6.02 × 10²³ × 3.35 × 10⁻²⁹

Va = 2.02 × 10⁻⁵ m³

The %age of total volume occupied can be determined by dividing the total atomic volume with the volume under STP. Under STP, the volume is 22.4 m³ or 2.24 × 10⁻² m³.  

Va/V = 2.02 × 10⁻⁵ m³ / 2.24 × 10⁻² m³

= 9.02 × 10⁻⁴ or 0.09 %

3 0
3 years ago
Potassium sulfate has a solubility of 15g/100g water at 40 Celsius. A solution is prepared by adding 39.0g of potassium sulfate
nadya68 [22]

Answer:

5.25 grams of potassium sulfate will get crystallize out.

Explanation:

Solubility of potassium sulfate at 40 °C = 15 g/100 g

This means that at 40 °C 15 g of potassium sulfate will get completely dissolved in 100 of water.

39.0 g of potassium sulfate to 225 g water, carefully heating the solution.

Amount of potassium sulphate will get dissolve in 225 g of water at 40 °C will be:

\frac{15g}{100g} × 225 = 33.75g

Amount of potassium sulfate precipitated out by the solution:

= 39.0 g-33.75 g = 5.25 g

At 40 °C 5.25 g of potassium sulfate will get precipitate out from the solution which means that solution is saturated.

Saturated solution are solution in which solute is dissolved in maximum amount. Further addition of solute results in precipitation of solute form the solution.

5.25 grams of potassium sulfate will get crystallize out.

(Hope this Helps can I pls have brainlist (crown)☺️)

8 0
2 years ago
What drives a galvanic cell?
lutik1710 [3]

Answer:

A galvanic cell is driven by the spontaneity of the chemical reaction occurring between the two compartments of the cell: Anode and Cathode.

Explanation:

A galvanic cell is driven by the spontaneity of the chemical reaction occurring between the two compartments of the cell: Anode and Cathode.

Note that the spontaneity of a reaction is either determined by its positive standard cell potential ( ξ ∘ ) or its negative free energy ( Δ G ∘ ).

6 0
2 years ago
Even tho im an expert on brainly i still need help bc science isn't my thing HELP PLS
Luba_88 [7]

Answer:

(d) on the left side ,because it is a reactant.

8 0
3 years ago
The chemical formula for aluminum hydroxide is Al(OH)3. Which of the following is true about aluminum hydroxide?
denpristay [2]
It has three OH groups.
6 0
3 years ago
Read 2 more answers
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