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Troyanec [42]
4 years ago
7

What is the percentage of magnesium sulfate in MgSO4 x 7H2O.

Chemistry
1 answer:
son4ous [18]4 years ago
5 0
48.78%
Percentage of MgSO4 = mass of MgSO4/ mass of sample (MgSO4. 7H20) and multiply it by 100.

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The third one because

Most minerals can be characterized and classified by their unique physical properties: hardness, luster, color, streak, specific gravity, cleavage, fracture, and tenacity.

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Need help with question 10
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Which electrons in an atom have the highest energy?
Anestetic [448]
The valence electrons
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Determine the mass of co2 prodeced by burning enough carbon to produce 5 x 10^2 kj
olga55 [171]
Answer:

= 55.7g

Explanation:

12g of carbon burnt to produce 5x10^2KJ

So, 5x10^2KJ(12g/393.5KJ)=15.2g

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7 0
3 years ago
socratic For the following reaction, 25.6 grams of hydrochloric acid are allowed to react with 52.4 grams of barium hydroxide .
TEA [102]

Answer:

63.7g BaCl₂

Explanation:

Based on the chemical reaction:

2HCl + Ba(OH)₂ → BaCl₂ + 2H₂O

<em>2 moles of HCl reacts per mole of barium hydroxide</em>

<em>  </em>

To solve this question, we need to convert the moles of each reactant to moles and, using the chemical reaction, find limiting reactant as follows:

<em>Moles Ba(OH)₂ - Molar mass: 171.34g/mol-</em>

52.4g Ba(OH)₂ * (1mol / 171.34g) = 0.306 moles Ba(OH)₂

<em>Moles HCl - Molar mass: 36.46g/mol-</em>

25.6g HCl * (1mol / 36.46g) = 0.702 moles HCl

For a complete reaction of 0.702 moles HCl are required:

0.702 moles HCl * (1mol Ba(OH)₂ / 2mol HCl) = 0.351 moles of Ba(OH)₂

As there are just 0.306 moles, limiting reactant is Ba(OH)₂

That means the maximum amount of BaCl₂ produced is:

0.306 moles Ba(OH)₂ * (1mol BaCl₂ / 1 mol Ba(OH)₂) = 0.306 moles BaCl₂

In mass -Molar mass BaCl₂: 208.23g/mol-

0.306 moles BaCl₂ * (208.23g / mol) = 63.7g BaCl₂

3 0
3 years ago
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