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SVETLANKA909090 [29]
3 years ago
8

Which statement is true?

Chemistry
2 answers:
MissTica3 years ago
8 0

Answer:

The correct answer is in an exothermic reaction the energy of the product is less than the energy of the reactants.

Explanation:

Exothermic reaction is a type of reaction that generates heat.As a result in case of an exothermic reaction the energy of the reactant is more than the energy of the product.

       That"s why the enthalpy change in an exothermic reaction is always positive .

lorasvet [3.4K]3 years ago
7 0

The correct answer is C. In an exothermic reaction, the energy of the products is less than the energy of the reactants.

Explanation:

A chemical reaction is a process during which two or more substances interact and form new products. In these, the first substances are known as the reactants while the substances at the end of the reaction are the products. Moreover, reactions often involve a change in the energy of substances this known as enthalpy.

In the case of exothermic reactions in which energy or heat is released, the enthalpy is negative, this means, the energy in the products is less than in the reactants because during the chemical reaction substances release energy. This makes option C correct. On the other hand, in endothermic reactions, energy is absorbed, and therefore it is expected energy in the products is more than the one in the reactants.

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___________ polymers can be produced in large quantities at low cost. please. thank you.
MA_775_DIABLO [31]

Answer:

Plastic polymers

Explanation:

Plastic polymers are usually made up of synthetic and semi-synthetic polymers such as polyethylene, polystyrene etc.

Plastic polymers have a unique property called malleability. Malleability is the ability of a substance to be moulded into different sizes and shapes.

When hear is applied plastics gets soft and can be molded into different forms and then it becomes hardened after exposure to air(dried).

The plastic polymers are usually very cheap to produce in large quantities which is why it is very common in industries.

5 0
3 years ago
What is a certain indicator that a molecule is polar
snow_lady [41]
Anything asymmetrical is polar
5 0
4 years ago
Determina el pH de una solución si la concentración de H es 3.5 x 10 molar, e indicar si es acido o bas
erastovalidia [21]

Answer:

Explanation:

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5 0
3 years ago
How much heat is absorbed when 63.7 g H2O(l) at 100 degrees Celsius and 101.3kPa is converted to steam at 100
Alona [7]

Answer:

Q = 143,921 J = 143.9 kJ.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the absorbed heat by considering this is a process involving sensible heat associated to the vaporization of water, which is isothermic and isobaric; and thus, the heat of vaporization of water, with a value of about 2259.36 J/g, is used as shown below:

Q=m*\Delta _{vap}H

Thus, we plug in the mass and the aforementioned heat of vaporization of water to obtain the following:

Q=63.7g*2259.36J/g\\\\Q=143,921J=143.9kJ

Regards!

3 0
3 years ago
Concerning the 10.0 mL of 0.50 M NaCl 100 mL of soltion:Does the dilution change the concentration
disa [49]
The answer is affirmative because <span>dilutions give you a weaker Molarity 
Plase see this in the dilution formula that follows:

C1V1 = C2V2 
(0.50M) (10.00ml) = (C2) (100ml) 
C2 = 0.050 M 
10X's weaker
</span>Hope this helps a lot 
6 0
3 years ago
Read 2 more answers
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