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4 years ago

The most active of all the chemical elements is a halogen known as

2 answers:

5 0

I personally thought flourine. That is because it contains less outer shell electrons than the other elements. This results in the element being able to attract another electron (becoming stable) more easily.

rodikova [14]4 years ago

3 0

Astatine. Because it has the smaller shell of electrons. I believe

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Calculate the molarity of a 150 g NaCl in 250 ml solution.

Marizza181 [45]

Answer: 10.3 mol/l

Explanation: Molality = concentration c = n/V

Amount of substance n = m/M = 150 g / 58.44 g/mol =

2,5667 mol . c = 2.5667 mol / 0.25 l = 10.2669 mol/l

c =

7 0

3 years ago

What are these smooth, distinct layers most directly evidence of ?

Neko [114]

Answer: The layers of the rocks in one region of the parks are smooth and distinct, which are evidence of many, many years of deposition. The layers on the rocks are because of different deposition of sediments. Different sediments deposited over the rocks through wind, water and ice over the ages

Explanation:

5 0

3 years ago

Read 2 more answers

If the number of moles of a gas initially contained in a 2.10 l vessel is doubled, what is the final volume of the gas in liters

Anon25 [30]

Avagadro's law gives the relationship between volume of gas and number of moles of the gas. When the temperature and pressure are constant, volume is directly proportional to number of moles of gas.
$\frac{V1}{n1} = \frac{V2}{n2}$
V -volume and n - number of moles of gas.
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation
initial number of moles n1 - N
n2 - 2N as the number of moles are doubled
V1 - initial volume - 2.10 L
V2 - final volume - V
substituting the values in the equation
$\frac{2.10L}{N} \frac{V}{2N}$
V = 4.20 L
final volume is 4.20 L

7 0

3 years ago

Determine the kinds of intermolecular forces that are present in each element or compound. you may want to reference ( pages 466

Alla [95]

Majorly there are four types of inter molecular forces: Permanent dipole (like in HCl or NaCl) Ion dipole and Ion induced dipole Hydrogen bonding Van der Waals forces (Keesom, Debye, and London dispersion force)

5 0

3 years ago

Select the correct answer.

Sladkaya [172]

Answer:

Option D. There will be a shift toward the reactants.

Explanation:

The reaction is:

$PCl_5(g)+heat\rightleftharpoons PCl_3(g)+Cl_2(g)$

The application of LeChatelier's principle leads to consider the heat as a reactant or a product depending on if it is on the left side or the right side.

In this reaction, the heat is on the left side, thus it must be considered a reactant.

Decreasing the temperature is equivalent to remove or consume heat. Thus, the reaction must shif to the left to compensate that reduction of heat. That is the reverse reaction shall be favored.

In conclusion, there will be a shift toward the reactants.

5 0

3 years ago