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3 years ago

14

Rank the following aqueous solutions from highest to lowest freezing point: 0.1 m FeCl3, 0.30 m glucose (C6H12O6), 0.15 m CaCl2.

Assume complete dissociation.

1 answer:

Tresset [83]3 years ago

8 0

Answer:

Explanation: See images below for explanation

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How many Mg atoms are presented in 3.00 moles of MgCl2

ella [17]

Answer:

1.81 x 10²⁴ atoms

Explanation:

To find the number of atoms in the given number of moles, we need to understand that every substance contains the Avogadro's number of particles.

More appropriately, a mole of any substance will contain the Avogadro's number of particles which is 6.02 x 10²³ atoms

So;

If 1 mole of a substance = 6.02 x 10²³ atoms;

3 mole of MgCl₂ will contain 3 x 6.02 x 10²³ = 1.81 x 10²⁴ atoms

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2 years ago

Which element is reduced in the following reaction: 2Mg+O₂ → 2MgO if Mg goes from 0 to +2 and O goes from 0 to -2?

Lyrx [107]

Answer:

O.

Explanation:

The element which is oxidized is the element that losses electrons and its oxidation state be more positive.

The element which is reduced is the element that gain electrons and its oxidation state be more negative.

<em> O goes from 0 to -2, so, it is the element that is reduced.</em>

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2 years ago

ASAPP Subtract to find the temperature changes

mamaluj [8]

Hello, I would like to help you, but I really don't understand the question

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3 years ago

Pure hydrogen (H₂) is a hazardous substance. Thus, safer and more cost effective techniques have been developed to store it as a

Paha777 [63]

Answer: hello your question has some missing details attached below is the missing details

answer : 25.5% ( B )

Explanation:

<u>Determine percentage yield </u>

molar mass = 35 g/mol

mass of Li₃N(s) = 70 g

product LiH(s) = 8.0 g ( actual yield )

theoretical yield ( LiH ) = 4 * 7.95 = 31.8 g

percentage yield = actual yield * 100 / theoretical yield

= 8 * 100/31.8

= 25.5%

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3 years ago

Are the properties of a specific element the same as the properties of a molecule made up of that element? Why or why not?

LuckyWell [14K]

Answer:

no molecule and properties or defent

4 0

2 years ago