3 years ago

10

Chemistry

1 answer:

kompoz [17]3 years ago

4 0

Answer:

10-10 above the 0 is positive and the ones below is - (negitive)

Explanation:

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Explanation:

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What mass of H2 is needed to react with 8.75 g of O2 according to the following equation: O2(g) + H2(g) → H2O(g)?

alina1380 [7]

Mass of H₂ needed to react with O₂ : 1.092 g

<h3>Further explanation</h3>

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

Reaction

O₂(g) + 2H₂(g) → 2H₂O(g)

mass of O₂ : 8.75 g

mol O₂(MW=32 g/mol) :

$\tt \dfrac{8.75}{32}=0.273$

From the equation, mol ratio of O₂ : H₂ = 1 : 2, so mol H₂ :

$\tt \dfrac{2}{1}\times 0.273=0.546$

Mass H₂ (MW=2 g/mol) :

$\tt 0.546\times 2=1.092~g$

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The process by which wind removes surface materials is called what?

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Given a 1.50 Liters of solution that contains 62.5 grams of magnesium oxide. What is the Molarity of that solution? Please show

zhenek [66]

Given:
1.50 L
62.5 grams
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Molarity: mol/L

First, find mol.

62.5 g x 1mole ÷ 40.31 g = 1.55 mol

then divide mol and the given liters

1.55mol ÷ 1.50 L= 1.03 M

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