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3 years ago

Which of the following statements best describes the properties of aluminum-28?

Chemistry

1 answer:

Contact [7]3 years ago

5 0

d. When aluminum-28 undergoes beta decay, silicon-28 is produced.

Explanation:

When the nuclei of aluminium-28 decays, it produces silicon- 28:

Aluminium ²⁸₁₃Al

Silicon 28 ²⁸₁₄Si

beta particle ⁰₋₁ $\beta$

²⁸₁₃Al → ²⁸₁₄Si + ⁰₋₁ $\beta$

This way, the mass and atomic number are conserved.

Conservation of mass number:

28 = 28 + 0, 28 = 28

13 = 14 -1 , 13 = 13

Learn more:

Balancing nuclear equations brainly.com/question/10094982

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Which best describes the oxidizing agent in this reaction? Cl2(aq) + 2Br(aq) 2Cl(aq) + Br2(aq) Bromine (Br) is the oxidizing age

steposvetlana [31]

Answer:
 Chlorine (Cl) is the oxidizing agent because it gains an electron.

Explanation:
Reaction is as follow,

 Cl₂ (aq) + 2 Br⁻ (aq) → 2Cl(aq) + Br₂ (aq)

Oxidation Reaction:

 2 Br⁻ → Br₂ + 2 e⁻

Two atoms of Br⁻ (Bromide) looses two electrons to form Br₂ molecule. Hence it is oxidized and is acting as reducing agent.

Reduction Reaction:

Cl₂ + 2 e⁻ → 2 Cl⁻

One molecule of Cl₂ gains two electrons to form two chloride ions (Cl⁻). Therefore, it is reduced and has oxidized Br⁻, Hence, acting as a oxidizing agent.

6 0

3 years ago

12. Which noble gas is expected to show the largest deviations from the ideal gas

Gennadij [26K]

Answer: E
Hope this helped :)

4 0

2 years ago

How many moles of O2 were produced in a decomposition reaction of H2O2 if the pressure was 0.978 atm, the temperature was 27C an

xxTIMURxx [149]

The number of mole of O₂ produced from the decomposition of H₂O₂ is 0.0033 mole

<h3>How to determine the number of mole of O₂ produced</h3>

We'll begin by obtaining the mole of H₂O₂ that decomposed. This is obatined as follow:

Pressure (P) = 0.978 atm
Temperature (T) = 27 °C = 27 + 273 = 300 K
Volume (V) = 0.082 L
Gas constant (R) = 0.0821 atm.L/Kmol
Mole of H₂O₂ (n) =?

PV = nRT

Divide both sides by RT

n = PV / RT

n = (0.978 × 0.082) / (0.0821 × 300)

n = 0.0033 mole

Finally, we shall determine the number of mole of O₂ produced. This is illustrated below

H₂O₂ -> H₂ + O₂

From the balanced equation above,

1 mole of H₂O₂ decomposed to produce 1 moles of O₂

Therefore,

0.0033 mole of H₂O₂ will also decompose to produce = 0.0033 mole of O₂

Thus, number of mole of O₂ produced from the reaction is 0.0033 mole

Learn more about number of mole:

brainly.com/question/13375719

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1 year ago

Help! why are chemical equations always balanced?

KengaRu [80]

Answer:

Explanation:

The Law of Conservation of Mass states that matter cannot be created or destroyed and must be conserved. I is stating matter cannot be created, which is true. II is saying that matter can only be rearranged/conserved, which again is true. III states matter cannot be destroyed, which is also true. IV is incorrect because it doesn't make sense. Matter does matter.

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2 years ago

A specimen of aluminum having a rectangular cross-section of 10 mm x 12.7 mm is pulled in tension with 35,500 N of force, produc

german

Explanation:

The given data is as follows.

Cross-section area of the rectangular is as follows.

Area = $10 mm \times 12.7 mm$