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murzikaleks [220]
4 years ago
10

In chemical reactions, there is a conservation of(1) energy, volume and mass

Chemistry
2 answers:
Lubov Fominskaja [6]4 years ago
4 0
<span>Answer: option (3) energy, charge and mass.
</span><span />

<span>Explanation:
</span><span />

<span>1) The conservation of energy is a universal principle: energy is neither created nor destroyed. This is the first law of thermodynamic.
</span><span />

<span>2) Mass conservation is another universal principle: mass is neither created nor destroyed. This principle is the base of the stochiometry: thas mass of the reactans equal the mass of the products. Another consequence, since the atoms are not transformed in the chemical reactions, is that the number of each kind of atoms in the reactants equal the number of the same kind of atoms in the products.
</span><span />

<span>3) The third principle is the conservation of charge. Also, charge is neither created nor destroyed. The electrons gained/lost by one species are lost/gained by other species. So, when one atom or molecule is oxidized other is reduced.</span>
4vir4ik [10]4 years ago
4 0
(3) energy, charge, and mass
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a 40-lb container of peat moss measure 14x20x30 inches and has an average density of 0.13 g/cm^3. how many bags of peat moss are
telo118 [61]

Volume of the peat moss = 14\times 20\times 30 inches

= 8400 in^{3}

Convert the above volume into cm^{3}

1 in^{3}= 16.4 cm^{3}

Thus, volume in cm^{3} is:

Volume of peat moss =  8400 in^{3}\times \frac{16.4 cm^{3}}{1 in^{3}}

= 137760 cm^{3}

Now,

Total volume by using area and depth of the peat moss = area of peat moss \times depth of peat moss

= (13 ft \times  25 ft)\times 1.9 inches

= (325 ft^{2})\times 1.9 inches

Convert above values in cm to get the value of volume in cm^{3}:

1 ft= 30.48 cm

1 in= 2.54 cm

Thus, volume in cm^{3} is:

Total volume = (325 ft^{2}\times\frac{(30.48 cm)^{2}}{(1 ft)^{2}})\times (1.9 in\times \frac{2.54 cm}{1 in})

= 301934.88 cm^{2}\times 4.826 cm

= 1457137.73088 cm^{3}

Now, number of bags is calculated by the ratio of total volume of the peat moss to the volume of the peat moss.

Number of bags  =\frac{total volume of peat moss}{volume of peat moss}

Substitute the values of volume in above formula:

Number of bags  = \frac{1457137.73088 cm^{3}}{137760 cm^{3}}

= 10.57

≅ 11 bags

Thus, number of bags of peat moss are needed to cover an area measure 13 ft by 25 ft to a depth of 1.9 inches are 11 bags.


4 0
3 years ago
A gas quickly expands in an isolated environment. During the process, the gas exchanges no heat with its surroundings. The proce
AysviL [449]

Answer:

e. adiabatic process

Explanation:

Adiabatic process  -

In the thermodynamic system , an adiabatic process is the one which involves no transfer of mass or heat of the substance , is referred to adiabatic process.

In this process , the temperature need not be constant ,

But only the heat is transferred into or out of the system .

Hence, from the given information of the question,.

The correct option is e. adiabatic process .

6 0
4 years ago
A reaction occurs via the following sequence of elementary steps. What is the reaction intermediate?
Trava [24]

Answer:

C is the reaction intermediate.

Explanation:

A reaction intermediate is a molecular structure that is formed during the reaction but then is converted in the final products.

Usually, these reaction intermediates are unestable and, for that reason, the lifetime of these structures is low.

In the reaction, you can see in the first step C is produced, but also, in the second step reacts producing D. As is produced and, immediately consumed,

<h3>C is the reaction intermediate.</h3>
3 0
3 years ago
The knowledge produced by science builds on old ideas and is constantly changing.
VikaD [51]
Yes it is always changing, as time moves on new technological advancements are made. This makes it possible for new ideas to be created. For example the depiction of an atom went through many stages throughout the years in order to find out our current final version. New scientists and new ideas can add on to older ones, making explanations that make more scientific sense.
6 0
3 years ago
What are characteristics of a chemical equation?
N76 [4]
Answer: e. Number 1 and 3
Reasoning: Correct formulas are necessary to get the correct outcome. No matter is created or destroyed, the equation must be balanced.
8 0
4 years ago
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