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3 years ago

Matching will give brainliest. if you can answer any it help

Chemistry

1 answer:

SpyIntel [72]3 years ago

4 0

Explanation:

In natural radioactive decay, three common emissions occur. When these emissions were originally observed, scientists were unable to identify them as some already known particles and so named them:

alpha particles ( α )

beta particles (β)

gamma rays (γ)

These particles were named using the first three letters of the Greek alphabet. Some later time, alpha particles were identified as helium-4 nuclei, beta particles were identified as electrons, and gamma rays as a form of electromagnetic radiation like x-rays, except much higher in energy and even more dangerous to living systems.

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Aluminum metal reacts with oxygen gas in a combination reaction that forms a product that coat the metal preventing it from furt

Rasek [7]

Answer:

d. 4 Al(s) + 3 O₂(g) → 2 Al₂O₃(s)

Explanation:

Aluminum metal reacts with oxygen gas in a combination reaction that forms a product that coats the metal preventing it from further oxidation: aluminum oxide. Aluminum is a cation with charge 3+ (Al³⁻) and oxide is an anion with charge 2- (O²⁻). Thus, the neutral compound aluminum oxide has the chemical formula Al₂O₃. The unbalanced chemical equation is:

Al(s) + O₂(g) → Al₂O₃(s)

We can balance using the trial and error method. First, we will balance O atoms by multiplying Al₂O₃ by 2 and O₂ by 3.

Al(s) + 3 O₂(g) → 2 Al₂O₃(s)

Finally, we get the balanced equation by multiplying Al by 4.

4 Al(s) + 3 O₂(g) → 2 Al₂O₃(s)

7 0

3 years ago

What is the biological advantage (in kj per mole of energy released as heat) of complete aerobic oxidation compared with anaerob

Elan Coil [88]

Aerobic respiration is the reaction of the compound or reactant in presence of oxygen whereas anaerobic respiration indicates the non availability of oxygen.

Aerobic respiration, responsible for the production of ATP slowly. It helps in breaking glucose molecule to $CO_2$ , and result in production of 38 ATP.

Whereas, anaerobic respiration break glucose molecule into two molecule of pyruvate. Glycolysis only releases two ATP per glucose. The anaerobic process occurs rapidly such as it lets the tissues and muscles to receive the energy for short durational activity.

This increase in production of energy explains the reason for domination of aerobic organisms on earth which helps in organisms to grow in size with multicellular system and great diversity

5 0

3 years ago

Select the correct answer. Which statement is true about limiting reactants? A. The limiting reactant in a reaction is the first

swat32

Answer:

completely converted to moles. done

6 0

3 years ago

Use the reaction and bond information to answer the question. C2H6 → C2H4 H2 Reactant bond energies: H–C = 413 kJ/mol, C–C singl

nlexa [21]

The energy of the reactant has been higher than the energy of the product, Thus, the reaction has been an exothermic reaction.

Bond energy has been defined as the chemical energy possessed by the bonds in the chemical structure. The energy has been conserved in the chemical reaction.

<h3>Is the reaction endothermic or exothermic?</h3>

In the reaction in which bond energy of the reactant has been higher than the product, it has been an exothermic reaction.

In the reaction in which the bond energy of the product is higher than the reactant, it has been an endothermic reaction.

In the given reaction

$\rm C_2H_6\;\rightarrow\;C_2H_4\;+\;H_2$

The bond energies of reactant has been:

H-C bond = 413 kJ/mol
C-C bond = 347 kJ/mol

The total bond energy of the reactant has been:

$\rm Reactant=6\;\times\;H-C\;bond\;+\;C-C\;bond \\Reactant=6\;\times\;413+347\;kJ/mol\\Reactant=2,825\;kJ/mol$

The total bond energy of the reactant has been 2,825 kJ/mol.

The bond energies of product has been:

H-C = 413 kJ/mol
C=C = 614 kJ/mol
H-H = 432 kJ/mol

The total bond energy of the product has been:

$\rm Product=4\;\times\;H-C\;bond\;+\;C=C\;bond\;+\;H-H\;bond\\Product=4\;\times\;413\;+\;614\;+\;432\;kJ/mol\\Product=2,698\;kJ/mol$

The total bond energy of the product has been 2,698 kJ/mol.

The energy of the reactant has been higher than the energy of the product, Thus, the reaction has been an exothermic reaction, as energy can neither be created nor be destroyed. It has been conserved in the chemical reaction.

Learn more about exothermic reaction, here:

brainly.com/question/26203526

4 0

3 years ago

If 9.5 atms of pressure were increased to 25 atms of pressure, what would be the final volume

nordsb [41]

Answer:

The final volume of the gas is 36.1 L.

Explanation:

Given:

Initial pressure of the gas is, $P_1=9.5\ atm$

Final pressure of the gas is, $P_2=25\ atm$

Initial volume of the gas is, $V_1=95\ L$

Final volume of the gas is, $V_2=?$

Here, we shall use Boyle's Law which states that for a process under constant temperature, the pressure of the gas changes inversely with the change in volume.

Here, the pressure is increased. So, the volume of the gas is decreased.

Therefore, as per Boyle's Law:

$P_1V_1=P_2V_2\\9.5\times 95=25V_2\\902.5=25V_2\\V_2=\frac{902.5}{25}\\V_2=36.1\ L$

So, the final volume of the gas is 36.1 L.

4 0

3 years ago