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lora16 [44]
3 years ago
12

HELP ME PLZ

Chemistry
2 answers:
nirvana33 [79]3 years ago
7 0
Dissolves easily in water
hichkok12 [17]3 years ago
7 0

Answer:

Salt is an ionic compound. It <em>dissolves easily in water (option A)</em>

Explanation:

An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.

A polar molecule is one that is neutral, that is, it does not have a net charge. But it has an internal distribution of charges that form a partially positive region and a partially negative region.

Water molecules are polar, with positive partial charges on hydrogen, a partial negative charge on oxygen and a general angular structure. Its distribution of charges is due to the greater electronegativity of oxygen with respect to hydrogen, which makes the shared electrons of the O-H bonds more attracted by the O atom than by the H atom.

The salt is an ionic compound of the formula NaCl. As salt mixes in water, charged water molecules break up charged salt molecules, which combine into a weaker ionic bond. Then the salt dissociates in water in Na + and Cl-. The positively charged Na + ions are surrounded by the negative partial oxygen charges of the water molecules, while the negatively charged ions are surrounded by the hydrogen ends with a positive partial charge. Given this, it can be said that the intermolecular forces that are acting in this case are the ion-dipole forces (intermolecular force that occurs when the ions of a substance interact with the dipoles of a polar covalent molecule). This allows the salt to dissolve easily in water.

So, <u><em>the correct option is A)It dissolves easily in water</em></u>

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If an alloy is formed that is 50 mol% silver and 50 mol% gold, what is the karat number of the alloy?
Allisa [31]
Answer : 12 karat

Explanation : When pure gold is considered to be 24 karat then if its 50 mol% silver and 50 mol% silver then using karat scale calculation;

Karat/24 X 100 = 50 mol% (for gold) in alloy

So, Karat = (50 X 24) / 100 = 12 karat.

Hence the alloy will be of 12 karat.
7 0
3 years ago
Read 2 more answers
A mixture of 15.0 g of the anesthetic halothane (C2HBrClF3 197.4 g/mol) and 22.6 g of oxygen gas has a total pressure of 862 tor
AlexFokin [52]

Answer : The partial pressure of C_2HBrClF_3 and O_2 are, 84 torr and 778 torr respectively.

Explanation : Given,

Mass of C_2HBrClF_3 = 15.0 g

Mass of O_2 = 22.6 g

Molar mass of C_2HBrClF_3 = 197.4 g/mole

Molar mass of O_2 = 32 g/mole

First we have to calculate the moles of C_2HBrClF_3 and O_2.

\text{Moles of }C_2HBrClF_3=\frac{\text{Mass of }C_2HBrClF_3}{\text{Molar mass of }C_2HBrClF_3}=\frac{15.0g}{197.4g/mole}=0.0759mole

and,

\text{Moles of }O_2=\frac{\text{Mass of }O_2}{\text{Molar mass of }O_2}=\frac{22.6g}{32g/mole}=0.706mole

Now we have to calculate the mole fraction of C_2HBrClF_3 and O_2.

\text{Mole fraction of }C_2HBrClF_3=\frac{\text{Moles of }C_2HBrClF_3}{\text{Moles of }C_2HBrClF_3+\text{Moles of }O_2}=\frac{0.0759}{0.0759+0.706}=0.0971

and,

\text{Mole fraction of }O_2=\frac{\text{Moles of }O_2}{\text{Moles of }C_2HBrClF_3+\text{Moles of }O_2}=\frac{0.706}{0.0759+0.706}=0.903

Now we have to partial pressure of C_2HBrClF_3 and O_2.

According to the Raoult's law,

p^o=X\times p_T

where,

p^o = partial pressure of gas

p_T = total pressure of gas

X = mole fraction of gas

p_{C_2HBrClF_3}=X_{C_2HBrClF_3}\times p_T

p_{C_2HBrClF_3}=0.0971\times 862torr=84torr

and,

p_{O_2}=X_{O_2}\times p_T

p_{O_2}=0.903\times 862torr=778torr

Therefore, the partial pressure of C_2HBrClF_3 and O_2 are, 84 torr and 778 torr respectively.

6 0
2 years ago
How many moles of oxygen are in 1 mole of Pb(SO4)2
irakobra [83]
The answer to the question is Eight
4 0
3 years ago
Read 2 more answers
Calculate the volume of this regular solid.
nataly862011 [7]

Answer:2,144.7

Explanation:

7 0
2 years ago
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Ultraviolet radiation and radiation of shorter wavelengths can damage biological molecules because they carry enough energy to b
Kamila [148]

Answer:

344 nm is the longest wavelength of radiation with enough energy to break carbon-carbon bonds.

Explanation:

C-C(g)\rightarrow 2C(g) ,ΔH = 348 kJ/mol

Energy required to break 1 mole of C-C bond = 348 kJ

Energy required to break 1 C-C bond = E

E = \frac{348,000J}{6.022\times 10^{23}}=5.779\times 10^{-19} J

Energy related with the wavelength of light is given by Planck's equation:

E=\frac{hc}{\lambda }

\lambda =\frac{hc}{E}

=\frac{6.626\times 10^{-34} Js\times 3\times 10^8 m/s}{5.779\times 10^{-19} J}

\lambda =3.44\times 10^{-7} m = 344 nm

1 m =10^9 nm

344 nm is the longest wavelength of radiation with enough energy to break carbon-carbon bonds.

5 0
3 years ago
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