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3 years ago

Two fluorine atoms held together by covalent bond. Which statement correctly described this bond ?

Chemistry

1 answer:

Shalnov [3]3 years ago

6 0

I feel as if there are multiple choice questions if so I need them If not I cant find the answer

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22.2 g of LiCiO4:3H2O in 125 mL of solution

PSYCHO15rus [73]

Answer:

Molarity: concentration measured by the number of moles of solute per liter of solution 3)

Explanation:

6 0

3 years ago

Solid lead acetate is slowly added to 75.0 mL of a 0.0492 M sodium sulfate solution. What is the concentration of lead ion requi

Firdavs [7]

Answer:

The concentration of lead ion required to just initiate precipitation is - $2.37\times10^-^5 M$

Explanation:

Lets calculate -:

Solubility equilibrium -: $PbI_2(s)$ ⇄ $Pb^2^+ (aq) + 2I^- (aq)$

Solubility product of $PbI_2$ , $Q=[Pb^2^+]_i_n_i_t_i_a_l$ $[I^-]^2_i_n_i_t_i_a_l$ $=9.8\times10^-^9$

Concentration of $I^-$ $=[KI]=0.0492M$

When the ionic product exceeds the solubility product , precipitation of salt takes place .

$Q_s_p\geq K_s_p$

$[Pb^2^+]_i_n_i_t_i_a_l$ $[I^-]^2_i_n_i_t_i_a_l$ $\geq 9.8\times10^-^9$

$[Pb^2^+]_i_n_i_t_i_a_l$ $[0.0492]^2$ $\geq 9.8\times10^-^9$

$[Pb^2^+]_i_n_i_t_i_a_l$ $\geq \frac{9.8\times10^-^9}{[0.0492]^2}$

$[Pb^2^+]_i_n_i_t_i_a_l$ $\geq$ $\frac{9.8\times10^-^9}{2.42\times10^-^3}$

$[Pb^2^+]_i_n_i_t_i_a_l$ $\geq$ $2.37\times10^-^5 M$

Thus , $PbI_2$ will start precipitating when $[Pb^2^+]_i_n_i_t_i_a_l$ $\geq 2.37\times10^-^5 M$ .

3 0

3 years ago

7. How many chlorine atoms are in a 34.2 g sample of dichlorine pentoxide?

Reptile [31]

Answer:

The answer to your question is 1.36 x 10²³ atoms

Explanation:

Data

number of atoms = ?

mass of the sample = 34.2 g

Molecule = Cl₂O₅

Process

1.- Calculate the molar mass of Cl₂O₅

Cl₂O₅ = (35.5 x 2) + (16 x 5) = 71 + 80 = 151 g

2.- Calculate the atoms of Cl₂O₅

151 g of Cl₂O₅ ---------------- 6 .023 x 10²³ atoms

34.2 g of Cl₂O₅ ------------ x

x = (34.2 x 6.023 x 10²³) / 151

x = 1.36 x 10²³ atoms

4 0

4 years ago

South Florida is surrounded by salt water. The need for fresh

Lady bird [3.3K]

Answer:

Aquifer

Explanation:

Instead of snowcapped mountains that store water in advance of warmer temperatures, most of our drinking water comes from underground "mountains" of porous materials called aquifers which are replenished by rain. The Biscayne Aquifer is South Florida's lower east coast's primary source of fresh water.

3 0

3 years ago

What is the element CH3CH2CH2CH2CH2OH?

dimaraw [331]

<span>Pentan-1-ol. 'Pentan' because it has a chain of 5 carbons. 'ol' because it has an alcohol group at the end (-OH), and the 1 represents the position of the alcohol group on the cardon chain. Though it is not an element. It is a compound which contains the elements Carbon, Hydrogen and Oxygen.

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7 0

4 years ago