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balandron [24]
3 years ago
12

the scientific law of conservation of mass states that the total amount of mass in an isolated system remains constant. This mea

ns that the atoms present before a reaction are still present at the end of a reaction, they are just rearranged to form a new molecules and compounds. This is a scientific law becuse
Chemistry
2 answers:
Verdich [7]3 years ago
4 0
It describes how, when particles/mc/elements react, despite forming different substances the mass is neither created nor destroyed but only converted.
Travka [436]3 years ago
4 0

Answer:

It is a statement based on repeated experiments and observations, that assures its veracity.

Explanation:

Hello,

In this case, a raft of experiments and observations were previously carried out and analyzed in order to substantiate whether the mass remains constant when a chemical reaction is undergone into an isolated system. This, in addition to the given conclusion, led to a scientific law as the law of conservation of mass is considered as a statement that came up from repeated experiments and observations in which a repeatable behavior of matter assured its veracity over a wide range of similar conditions.

Best regards.

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Help me with this pleaseeeeeee
stiks02 [169]

Magnesium oxide is an ionic compound with a very high melting point and which requires a large amount of energy for melting.

<h3>What are ionic compounds?</h3>

Ionic compounds are compounds which are formed between oppositely charged ions which are held together by electrostatic forces of attraction between the oppositely charged ions.

Ionic compounds are formed when metal atoms donate electrons to non-metals atoms to form ions.

Magnesium oxide is an ionic compound.

The nature of bonding is ionic bonding.

It has a crystalline lattice structure.

The forces of attraction is electrostatic forces of attraction.

It has a high melting point of 2,852 °C, and thus requires a large amount of energy go melting to occur.

Therefore, magnesium oxide is an ionic compound which requires a large amount of energy for melting.

Learn more about ionic compounds at: brainly.com/question/11638999

3 0
2 years ago
Which is NOT a way to accelerate an object? *
olasank [31]
Slow it down - I believe?
4 0
3 years ago
A reaction of importance in the formation of smog is that between ozone and nitrogen monoxide described by O 3 ( g ) + NO ( g )
Aleksandr [31]

Answer:

(a) 7.11x10⁻⁴ M/s

(b) 2.56 mol.L⁻¹.h⁻¹

Explanation:

(a) The reaction is:

O₃(g) + NO(g) → O₂(g) + NO₂(g)   (1)

The reaction rate of equation (1) is given by:

rate = k*[O_{3}][NO]     (2)

<u>We have:</u>

k: is the rate constant of reaction = 3.91x10⁶ M⁻¹.s⁻¹

[O₃]₀ = 2.35x10⁻⁶ M

[NO]₀ = 7.74x10⁻⁵ M

Hence, to find the inital reacion rate we will use equation (2):

rate = k*[O_{3}]_{0}[NO]_{0} = 3.91 \cdot 10^{6} M^{-1}s^{-1}*2.35\cdot 10^{-6} M*7.74 \cdot 10^{-5} M = 7.11 \cdot 10^{-4} M/s  

Therefore, the inital reaction rate is 7.11x10⁻⁴ M/s

(b) The number of moles of NO₂(g) produced per hour per liter of air is:

t = 1 h

V = 1 L

\frac{\Delta[NO_{2}]}{\Delta t} = rate

\frac{\Delta[NO_{2}]}{\Delta t} = 7.11 \cdot 10^{-4} M/s*\frac{3600 s}{1 h} = 2.56 mol.L^{-1}.h{-1}

Hence, the number of moles of NO₂(g) produced per hour per liter of air is 2.56 mol.L⁻¹.h⁻¹

I hope it helps you!                                

5 0
3 years ago
What is meant by enthalpy change?
Vinil7 [7]
Enthalpy change refers to the overall amount of heat added or lost with each step as you progress through your reaction.
7 0
3 years ago
Which of the following most likely happens during a chemical change?
tigry1 [53]

The answer is the last option.

4 0
3 years ago
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