Which is true about the dissolving process in water? Nonpolar solutes dissolve easily in water. Solute molecules surround water molecules. Molecules or ions of a solute spread throughout the water molecules. Water molecules are repelled by solute ions at the surface of the solute.

Answers

Answer 1

Answer: The simple principle for solute dissolution in a particular solvent is "like dissolves like". In the case of water, a solute will dissolve if it is polar. This is because water is a polar solvent. A polar substance is one which has particles that have a net charge on them. This net charge produces forces of attraction. When a polar solute is added to water, the water molecules are attracted to the solute particles and they attach to them. After attaching to the water molecules, the solute particles are dispersed throughout the water. Therefore, the answer is molecules or ions of a solute spread throughout the water molecules.

Answer 2

Answer:

Answer:

C. Molecules or ions of a solute spread throughout the water molecules.

Explanation:

C. Molecules or ions of a solute spread throughout the water molecules.

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How many occupied orbitals does a fluorine atom contain in the ground state?

Answers

Well, the configuration is $1s^22s^22p^5$ . To show the electrons, we have 1s as [**], 2s as [**], 2p as [**][**][*-], where * is an electron and - is a vacant slot. We have 5 occupied orbitals (4 fully occupied, one partially occupied)

Linolenic acid (C18H30O2) can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C18H30O2 + 3H2 --->C18H36O2 What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

Answers

1.998 ml of hydrogen gas volume is is required to react with 10.5 g of linolenic acid in this reaction.

Explanation:

Data given:

mass of linolenic acid is given = 10.5 grams

atomic mass of linoleinic acid = 278.43 grams/mole

volume of hydrogen required at STP = ?

Balance chemical reaction:

C18H30O2 + 3H2 --->C18H36O2

moles of linoleinic acid given = $(mass)/(atomic mass of 1 mole)$

putting the values in the equation:

moles of linoleinic acid = $(10.5)/(278.43)$

= 0.037 moles

from the balanced equation:

1 mole of linoleinic acid reacts with 3 moles of hydrogen

so, 0.037 moles will react with x moles of hydrogen gas

$(1)/(3)$ = $(0.037)/(x)$

x = 0.111 moles of water

volume or mass = atomic mass x number of moles

volume of hydrogen gas= 1.998 ml

Final answer:

Around 2.53 liters of hydrogen gas, at STP, is required to fully hydrogenate 10.5 g linolenic acid to stearic acid.

Explanation:

To solve this problem, we first need to find the molar mass of linolenic acid (C18H30O2). The molar mass is calculated by adding the molar masses of all the atoms in the molecule: (18*12.01) + (30*1.01) + (2*16.00) = 278.44 g/mol. Next, we calculate the number of moles of the linolenic acid we have: 10.5 g / 278.44 g/mol = 0.0377 mol. According to the balanced chemical equation, we need 3 mol of hydrogen per mol of Linolenic acid, so we need 0.0377 mol * 3 = 0.1131 mol of hydrogen gas. Finally, at STP, 1 mole of any type of gas occupies a volume of roughly 22.4 L, so the volume required is 0.1131 mol * 22.4 L/mol = 2.53 L.

Learn more about Stoichiometry here:

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List three possible results of a double replacement reaction

Answers

1. two compounds form
2. precipitate forms
3. ions exchanged between the two reactants

Which pair below describes isotopes of the same element? A) an atom with 6 protons and 8 neutrons - an atom with 8 protons and 6 neutrons
B) an atom with 6 protons and 6 neutrons - an atom with 6 protons and 7 neutrons
C) an atom with 8 protons and 8 neutrons - an atom with 7 protons and 8 neutrons
D) an atom with 7 protons and 6 neutrons - an atom with 6 protons and 6 neutrons

Answers

Answer: The correct answer is Option B.

Explanation:

Isotope is defined as the chemical specie which belong to the same element but differ in their molecular mass.

The isotopes have same atomic mass but differ in their mass numbers

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Thus, isotopes of an element has same number of protons but they differ in the number of neutrons.

For Example: Chlorine has 2 isotopes, $_(17)^(35)\textrm{Cl}\text{ and }_(17)^(37)\textrm{Cl}$

In $_(17)^(35)\textrm{Cl}$ isotope:

Number of protons = 17

Number of neutrons = 35 - 17 = 18

In $_(17)^(37)\textrm{Cl}$ isotope:

Number of protons = 17

Number of neutrons = 37 - 17 = 20

Hence, the correct answer is Option B.

B because isotopes have the same number of protons but a different number of neutrons

Explain what happens to a fixed sample of gas when its temperature changes.

Answers

The Ideal gas law: pV=nRT

n=const.
R=const.

V~T, it means If temperature increase than volume of gas increase.
if temperature decrease than volume of gas decrease.

What measures the mads of an object

Answers

Mass is the amount of matter an object has. We often use a triple-balance beam to measure mass. A triple-beam balance gets its name because it has three beams that allow you to move known massesalong the beam. Here is a picture of a triple beam balance.

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