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2 years ago

What do valence electrons determine about an element?

Chemistry

1 answer:

vekshin12 years ago

3 0

Its electronegativity and how easily it can bond with other elements or atoms.

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Describe how lead sulfate can be prepared using silver hydroxide

Anastaziya [24]

Answer:

i would have to add and divide

Explanation:

adding and dividing will get you the answer

4 0

2 years ago

Chemical Name for Rb2S

Westkost [7]

Answer:

Rubidium Sulfide

Explanation:

The chemical name for Rb2S is Rubidium Sulfide

6 0

2 years ago

Read 2 more answers

When copper metal is added to nitric acid, the following reaction takes place

zlopas [31]

Answer:

The volume of NO₂ gas collected over water at 25.0 °C is 1.68 Liters.

Explanation:

$Cu (s) + 4 HNO_3 (aq) \rightarrow Cu(NO_3)_2 (aq) + 2 H_2O (l) + 2 NO_2 (g)$

Moles of copper = $\frac{2.01 g}{63.55 g/mol}=0.03163 mol$

According to reaction, 1 mol of copper gives 2 moles of nitrogen dioxide gas.

Then 0.03613 moles of copper will give:

$\frac{2}{1}\times 0.03163 mol=0.06326 mol$ of nitrogen dioxide gas

Moles of nitrogen dioxide gas = n = 0.06326 mol

Pressure of the gas = P

P = Total pressure - vapor pressure of water

P = 726 mmHg - 23.8 mmHg = 702.2 mmHg

P = 0.924 atm (1 atm = 760 mmHg)

Temperature of the gas = T = 25.0°C =298.15 K

Volume of the gas = V

$PV=nRT$

$V=\frac{0.06326 mol\times 0.0821 atm L/mol K\times 298.15 K}{0.924 atm}$

V = 1.68 L

The volume of NO₂ gas collected over water at 25.0 °C is 1.68 Liters.

3 0

3 years ago

When one carbon atom is bonded with several other carbon atoms in a single line, then how is the structure described?

Solnce55 [7]

Its described as a Straight Branch, hope this helps :)

3 0

2 years ago

Why should the boiling point of the solvent be lower than the melting point of the compound being recrystallized?

exis [7]

The recrystallization solvent ought to have a genuinely low breaking point since it makes it simpler for the solvent to vanish out when the arrangement air drys.The breaking point ought to be bring down the softening purpose of the compound.If the breaking point is bigger than the dissolving purpose of the intensify, the crystals will liquefy and turn out as an oil rather than crystals. This would be difficult to examine.

3 0

3 years ago