3 years ago

In the chemical formula, is the metal or nonmetal symbol written first?

1 answer:

6 0

Chemical formulas are written from the most metllic
for example group Alkali Metals are the most metallic, so they will be written first.

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Please help urgent Balance the following word equation:

LekaFEV [45]

Answer:

AlCl3 + 3Na > Al + 3NaCl

Explanation:

AlCl3+Na → Al + NaCl

Al =1 Al=1

Cl =3 Cl = 1

Na=1. Na = 1

so balance

and it would be

Alcl3 + 3Na → Al + 3NaCl

8 0

3 years ago

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Mamont248 [21]

Erm i’m afraid we need the list

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2 years ago

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Tems11 [23]

Answer:

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2 years ago

What is the freezing point of a solution of 0.5 mol of LiBr in 500 mL of water? (Kf = 1.86°C/m) –1.86°C –7.44°C –5.58°C –3.72°C

tresset_1 [31]

Answer:

Last choice: - 3.72°C

Explanation:

The freezing point depression in a solvent is a colligative property: it depends on the number of solute particles.

The equation to predict the freezing point depression in a solvent is:

ΔTf = Kf × m × i

Where,

ΔTf is the freezing point depression of the solvent,

m is the molality,

Kf is the cryoscopic molal constant of the solvent, and i is the Van'f Hoff factor, which is the number of ions produced by each unit formula of the ionic compound.

The calcualtions are in the attached pdf file. Please, open it by clicking on the image of the file.

Download pdf

6 0

3 years ago

there are tiny plants growing on rock fence after the several year . you observe something happened on the rock which of the fol

Bingel [31]

it is moss

Explanation:

5 0

3 years ago