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dybincka [34]
3 years ago
10

Which statement shows why mass is conserved for this reaction? 2Mg + O2 → 2MgO

Chemistry
1 answer:
kogti [31]3 years ago
4 0

Answer:

The same number of each atom are on both sides of the equation.

The Law of conservation of mass states that matter is neither destroyed nor created in a chemical reaction. Therefore, the mass of the reactants will be equal to the mass of the products in a chemical reaction. According to the law matter is neither created nor destroyed in a chemical reaction.

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Two moles of neon gas enclosed in a constant volume system receive 4250 J of heat. If the gas was initially at 293 K, what is th
Veseljchak [2.6K]

Answer:

<u><em>=355.5K</em></u>

Explanation:

Specific heat, Q = mcΔT

where

  • Q= 4250J
  • ΔT= change in temp = final temp - initial temp
  • c = specific heat capacity = 1.7
  • m = mass of substance in grams

[1 mole of Ne = 20g; 2 moles of Ne = 2 × 20 = 40g]

4250 = 40 × 1.7 × (final - 293K)

final - 293k = 4250 / ( 40 × 1.7)

Final temp = 62.5 + 293

<em>=355.5K</em>

I hope this steps are simple to follow and understand.

3 0
3 years ago
PLS HELP ASAP
Scorpion4ik [409]

Answer:

The concentration of hydroxide ions in a 3.5 is

C. 10.5

5 0
3 years ago
A method that uses a mathematical equation and the half-life of decay to determine the exact date of a fossil is known as ______
Dimas [21]
The answer is indeed carbon dating, but let me explain it to you a little bit better: This is so because Carbon dating is the method that has the determination of the age of an organic matter. That is why we can say that that uses a mathematical equation and the half-life of decay to determine the exact date of a fossil. Hope this clarifies everything
6 0
3 years ago
Read 2 more answers
Helppppppppppppppppppp
lesantik [10]

Explanation:

The Watershed

The land that seperates water flowing

Hope this is correct and helpful

HAVE A GOOD DAY!

7 0
3 years ago
What is δs° for the reaction so2(s) no2(g) → so3(g) no(g)? substance s°(j/k • mol) so2(g) 248.5 so3(g) 256.2 no(g) 210.6 no2(g)
zimovet [89]

The value of ΔS° for reaction  is - 22.2 J/K.mol

SO_{2}(s)+NO_{2} (g) → SO_{3}(g)+NO(g)

Calculation,

Given value of S°(J/K.mol) for

SO_{2}(s) = 248.5

NO_{2} (g) = 240.5

NO(g) = 210.6

SO_{3}(g) = 256.2

Formula used:

ΔS° (Reaction) =  ∑S°(Product) - ∑S°(Reactant)

ΔS° = (256.2 + 210.6 ) - ( 248.5 + 240.5) = 466.8 - 489 = - 22.2 J/K.mol

The change in stander entropy of reaction is  - 22.2 J/K.mol. The negative sign indicates the that entropy of reaction is decreases when reactant converted into product.

learn about reaction

brainly.com/question/3664113

#SPJ4

3 0
2 years ago
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