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spayn [35]
2 years ago
9

Referring to the experiment in which the scientists studies how long it

Chemistry
1 answer:
pshichka [43]2 years ago
4 0

Answer:

different sizes of the parachute

Explanation:

this is what is being changed throughout the experiment

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Convert 15.6 g Na2Cr2O7 to moles of Na2Cr2O7.
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El fluoruro de hidrógeno HF que se utiliza en
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25.6g de HF son producidos

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<em>...¿Cuánto HF es producido?</em>

Para resolver este problema debemos convertir la masa de cada reactivo a moles usando su masa molar. Como la reacción es 1:1, el reactivo con menor número de moles es el reactivo limitante. Con las moles del reactivo limitante podemos obtener las moles de HF y su masa así:

<em>Moles CaF2:</em>

Masa molar:

1Ca = 40g/mol

2F = 19*2 = 38g/mol

40+38 = 78g/mol

50g CaF2 * (1mol/78g) = 0.641 moles CaF2

<em>Moles H2SO4:</em>

Masa molar:

2H = 2g/mol

1S = 32g/mol

4O = 64g/mol

98g/mol

100g H2SO4 * (1mol / 98g) = 1.02 moles H2SO4

Como las moles de CaF2 < Moles H2SO4: CaF2 es reactivo limitante.

<em>Moles HF usando la reacción:</em>

0.641 moles CaF2 * (2mol HF / 1mol CaF2) = 1.282 moles HF

<em>Masa HF:</em>

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1g/mol + 19g/mol = 20g/mol

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<h3>25.6g de HF son producidos</h3>
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