3 years ago

The heat of fusion for water is 80. cal/g. how many calories of heat are released

Chemistry

1 answer:

Ray Of Light [21]3 years ago

7 0

800 calories are released

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dem82 [27]

They are gases at room temperature

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3 years ago

If 42.8 mL of 0.204 M HCl solution is needed to neutralize a solution of Ca(OH)2, how many grams of Ca(OH)2 must be in the solut

Aneli [31]

Hey There!

At neutralisation moles of H⁺ from HCl = moles of OH⁻ from Ca(OH)2 so :

0.204 * 42.8 / 1000 => 0.0087312 moles

Moles of Ca(OH)2 :

2 HCl + Ca(OH)2 = CaCl2 + 2 H2O

0.0087312 / 2 => 0.0043656 moles ( since each Ca(OH)2 ives 2 OH⁻ ions )

Therefore:

Molar mass Ca(OH)2 = 74.1 g/mol

mass = moles of Ca(OH)2 * molar mass

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3 years ago

Select the correct answer.

solong [7]

I think it’s A but I’m not sure, if it’s wrong I’m sorry

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3 years ago

What is the molarity of a solution that contains 17g of NH₃ in 0.50L of solution?

erastovalidia [21]

Explanation:

Because molarity is mol/L, we'll have to convert 17g to mol.

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3 years ago

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Draw the structure of the bromohydrin formed when (Z)-3-hexene reacts with Br2/H2O. Use the wedge/hash bond tools to indicate st

Ipatiy [6.2K]

Answer:

(3R,4R)-4-bromohexan-3-ol

Explanation:

In this case, we have reaction called halohydrin formation. This is a markovnikov reaction with anti configuration. Therefore the halogen in this case "Br" and the "OH" must have different configurations. Additionally, in this molecule both carbons have the same substitution, so the "OH" can go in any carbon.

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3 years ago