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3 years ago

Which one of the following descriptions relating to nuclear reactions is correct?

Chemistry

1 answer:

monitta3 years ago

4 0

Answer: option D - The total number of nucleons changes.

Explanation:

Nuclear Reaction is best described as a process such as the fission of an atomic nucleus, or the fusion of one or more atomic nuclei and / or subatomic particles in which the NUMBER of PROTONS and / or NEUTRONS in a nucleus CHANGES; the reaction products may contain a different element or a different isotope of the same element.

Note that the NUCLEONS refers to ONE of the subatomic particles of the atomic nucleus, i.e. a PROTON or a NEUTRON.

So, in a Nuclear reaction, the total number of nucleons changes.

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Which layer over time due to chemical and physical weathering leads to the other layers?

ivanzaharov [21]

Answer:

chemical weathering occurs on the surface of minerals, the water and acids that control chemical weathering require access to the surface. Physical weathering breaks the rock to provide that surface

7 0

2 years ago

In Ontario, some electricity comes from coal-burning generators. Coal is a natural form of carbon that has a large amount of sul

irinina [24]

Answer:

$C(s)+O_{2}(g) \rightarrow CO_{2}(g)$

$S(s)+O_{2}(g) \rightarrow SO_{2}(g)$

Sulphurdioxide

$SO_{2}(g) + H_{2}O(l) \rightarrow H_{2}SO_{3}(l)$

$SO_{2}(g) + \frac{1}{2}O_{2} \rightarrow SO_{3}(g)$

Incomplete combustion produce harmful gases.

Explanation:

Carbon reacts with atmospheric oxygen to form carbondioxide as well as sulphur dioxide.

The chemical equations are as follows.

$C(s)+O_{2}(g) \rightarrow CO_{2}(g)$

$S(s)+O_{2}(g) \rightarrow SO_{2}(g)$

Sulfur dioxide is very harmful to the environment to cause acid rains.

This harmful gas mix with rain water to form sulphuric acid.

The balanced chemical equation for the reaction that produces harmful environmental effects is as follows.

$SO_{2}(g) + H_{2}O(l) \rightarrow H_{2}SO_{3}(l)$

$SO_{2}(g) + \frac{1}{2}O_{2} \rightarrow SO_{3}(g)$

$SO_{3}(g) +H_{2}O(l) \rightarrow H_{2}SO_{4}(l)$

In the absence of proper amount of oxygen required for combustion, incomplete combustion will take place which will result in formation of more carbondioxide an other harmful gases.

4 0

3 years ago

How many nadh molecules are produced on each turn of the citric acid cycle?

Kaylis [27]

Answer:

three NADH molecules

The eight steps of the citric acid cycle are a series of redox, dehydration, hydration, and decarboxylation reactions. Each turn of the cycle forms one GTP or ATP as well as three NADH molecules and one FADH2 molecule, which will be used in further steps of cellular respiration to produce ATP for the cell.

Explanation:

5 0

3 years ago

Read 2 more answers

For the reaction bro3- + 5br- + 6h+ → 3br2 + 3h2o at a particular time, -δ [bro3-]/δt = 1.5 × 10-2 m/s. what is -δ [br-]/δt at t

sdas [7]

The $ -(Br) at that instant is calculated as follows
BrO3 + 5Br ---> 3Br2 + 3 H2o

by use of reacting ratio BrO3 to Br2 which is 1:3

therefore $ of Br = 3 x (1.5 x10^-2)= 4.5 x10^-2

5 0

3 years ago

Read 2 more answers

Please help with the question

kvasek [131]

The law of conservation of mass states that mass can neither be created nor destroyed. This means that, in a chemical reaction, the mass of reactants should be equal to the mass of products.

The equation we have is:
Al + 3HCl .....> H2 + AlCl3
For aluminum: we have one mole in the reactants and one mole in the products. Therefore, aluminum is balanced
For chlorine: we have three moles in the reactants and three moles in the products. Therefore, chlorine is balanced
For hydrogen: we have three moles in the reactants and only two moles in the products. Therefore, hydrogen needs to be balanced as there are fewer hydrogen moles in the products than in the reactants.

Based on this, the right choice is:
Only hydrogen needs to be balanced. There are equal numbers of aluminum and chlorine.

6 0

3 years ago