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artcher [175]
3 years ago
9

Reactant A illustrates an example of which of the following​

Chemistry
1 answer:
prohojiy [21]3 years ago
7 0

Answer:

But TVs de dog was nru

Explanation:

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Which is the properly balanced equation that shows the synthesis of limewater, Ca(OH)2, from calcium oxide and water?
Maurinko [17]
Calcium oxide CaO and water H₂O react to form Ca(OH)₂

CaO + H_2O \to Ca(OH)_2

The answer is A.
5 0
4 years ago
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What trait is the result of incomplete dominance
Gnoma [55]
My answer would have to be Greed

3 0
3 years ago
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2. Se combinan 40 g de SO2 y 25 g de O2 determine el porcentaje en masa del exceso con respecto a su masa inicial. P.A. (S = 32;
Marta_Voda [28]

Answer:

60%

Explanation:

En la reacción:

2SO₂ + O₂ → 2SO₃

<em>Donde 2 moles de SO₂ reaccionan por mol de O₂.</em>

El peso atómico del SO₂ es:

1S = 32g/molₓ1 = 32g/mol

2O = 16g/molₓ2 = 32g/mol

SO₂ = 32g/mol + 32g/mol = <em>64g/mol</em>

Y el peso atómico de O₂ es:

2O = 16g/molₓ2 = <em>32g/mol</em>

Las moles de SO₂ y O₂ son:

SO₂: 40g ₓ (1mol / 64g) = <em>0.625 moles</em>

O₂: 25g ₓ (1mol / 32g) = <em>0.7813 moles</em>

Para una completa reacción de SO₂ se necesitan:

0.625 moles SO₂ ₓ (1mol O₂ / 2 mol SO₂) = <em>0.3125 moles de O₂</em>

Así, las moles en exceso de O₂ son:

0.7813 moles - 0.3125 moles = 0.4688 moles O₂

En gramos:

0.4688 moles O₂ ₓ (32g / mol) = 15g O₂ están en exeso.

El porcentaje en exceso es:

15g / 25g ₓ 100 =

<h3>60%</h3>
8 0
4 years ago
Does anyone know how to do this??? Calculate the % yield
eimsori [14]

Answer:

Percentage Yield = 56.9% (to 3 significant figures)

Explanation:

Firstly you need to calculate the amount of moles of Na used. Moles = Mass/Mr, so moles of Na = 1.72x10^-3/23. This gets you 7.47826087x10^-5 moles.

The mole ratio of Na:Na2O is 2:1 so the moles of Na2O will be the moles of Na divided by 2. This gets you 3.739130435x10^-5 moles.

Mass = Moles x Mr

The Mr of Na2O = 62

Mass = 3.739130435x10^-5 x 62 = 2.31826087x10^-3g

Percentage Yield = (Actual Yield / Theoretical Yield) x 100

Percentage Yield = (1.32x10^-3 / 2.31826087x10^-3) x 100

Percentage Yield = 56.93923481%

Percentage Yield = 56.9% (to 3 significant figures)

8 0
3 years ago
A sample of a gas has a pressure of 248mm Hg when the volume is 1.05L. What is the pressure of the gas when the volume is 3.98L?
ozzi
P1V1 = P2V2
Convert 248mm Hg to atm
248/760 = 0.326 atm
(0.326 atm • 1.05L) / 3.98L = 0.0861 atm
8 0
4 years ago
Read 2 more answers
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