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denis23 [38]
3 years ago
15

HELP PLEASE

Chemistry
1 answer:
Phoenix [80]3 years ago
8 0

<u>mass of reactants = mass of products</u> best represents the law of conservation of mass

Explanation:

This is a law of thermodynamic that applies to chemical reactions. The mass of the reactants must equal to that of the products because energy/mass cannot be destroyed or created. This is why ideally, chemical reactions should be balanced to conform to this law.

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On the account of the physical state of a solute and solvent, solutions can be said to be of _______. Types.
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c. 9

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3 years ago
Groups of atoms with aligned magnetic poles are called.
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Answer: Groups of atoms with aligned magnetic poles are called magnetic domains. Each domain contains an enormous number of atoms, yet the domains are too small to be seen with the unaided eye.

Explanation:

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What is the element found in Group 17 Period 4?​
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Answer:

Bromine is found in Group 17, Period 4 on the periodic table.

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3 years ago
giving the incomplete equation 2N2O5 (g) which set of products completes and balances the incomplete equarion
a_sh-v [17]

Answer:

The complete question is as follows

Given the incomplete equation: 2 N2O5(g) ==>  Which set of products completes and balances the incomplete equation?

A)2 N2(g) + 3 H2(g)

B)2 N2(g) + 2 O2(g)

C)4 NO2(g) + O2(g)

D)4 NO(g) + SO2(g)

The correct option is C) 4NO2(g) + O2(g)

Explanation:

Note that the products should be NO2 and O2 since the reactant is entirely made up of N and O. option A is not correct as hydrogen cannot emerge as a product in this reaction. Matter can never be created or be destroyed bu can only change in a chemical reaction. Option D is not also correct for the same reason.

Option B is not correct since it did not balance the number of atoms of O and N in the reactant side of the equation.

The option C) 4NO2(g) + O2(g) is therefore the right option since it balances both the elements and the number of atoms of the elements present.

7 0
3 years ago
The change in energy needed to change the state of a substance is
ohaa [14]

Answer: energy transfer

Explanation:

latent heat, also called the heat of vaporization, is the amount of energy necessary to change a liquid to a vapor at constant temperature and pressure.

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