How do hydrogen bonds compare with other intermolecular forces?
A. Hydrogen bonds are stronger than dipole-dipole and van der waals forces.

B. Hydrogen bonds are weaker than dipole-dipole and Van der Waals forces

C. Hydrogen bonds are weaker than dipole-dipole forces but stronger than Van der Waals forces.

D. Hydrogen bonds are stronger than dipole-dipole forces but weaker than Van der Waals forces.

Answer:

Sublimation is the process from a solid directly into a gas. The particles of a solid absorb enough energy to completely overcome the force of attraction between them. Solid carbon dioxide changes directly to the gaseous state. Therefore the state from soiid and gas can be observed.

Explanation:

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Answer:

3000ppm of PO₄³⁻

Explanation:

First, we need to calculate the moles of potassium dihydrogen phosphate, KH₂PO₄. These moles are equal to moles of phosphate, PO₄³⁻:

Moles KH₂PO₄ -Molar mass: 136.086g/mol-:

0.430g KH₂PO₄ * (1mol / 136.086g) = 3.16x10⁻³moles KH₂PO₄ = Moles PO₄³⁻.

Now, mass of PO₄³⁻ is:

Mass PO₄³⁻ -molar mass: 94.97g/mol:

3.16x10⁻³moles PO₄³⁻ * (94.97g / 1mol) = 0.300g of PO₄³⁻ = 300mg

In 100mL = 0.100L

300mg PO₄³⁻ / 0.100L =

0.430 g of KH₂PO₄ contain 0.300 g of PO₄³⁻. When dissolved in 100 mL of water, the resulting solution is 3000 ppm in PO₄³⁻.

We want to calculate the mass of PO₄³⁻ in 0.430 g of  KH₂PO₄.

We know that:

0.430 g KH₂PO₄ × (94.97 g PO₄³⁻/136.08 g KH₂PO₄) = 0.300 g PO₄³⁻

When 0.300 g  (300. mg) of PO₄³⁻ are dissolved in 100 mL of water, the resulting concentration, in ppm, is:

300. mg/0.100 L = 3000 ppm

0.430 g of KH₂PO₄ contain 0.300 g of PO₄³⁻. When dissolved in 100 mL of water, the resulting solution is 3000 ppm in PO₄³⁻.

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Answer:

D) Both products are solids.

Explanation:

In a chemical reaction such as:

CaI2 (s) + Cl2 (g) → CaCl2 (s) + I2 (s)

You can see the phases of the chemicals involved in the reaction inmediately after the chemical formula. Where (s) means solid, (l) liquid and (g) gas

The CaI₂, CaCl₂ and I₂ are solids and Cl₂ a gas.

That means the products are solids and right solution is:

Answer:

True

Explanation:

Given parameters:

   Number of neutrons = 21

   Mass number  = 40

Unknown:

Number of electrons = 19

Number of neutrons  = 21

Solution:

To find verify whether it is true or false, we must understand the relationship between the given species.

  Protons are the positively charged particles

  Neutrons do not carry any charge

  electrons are the negatively charged particles

Mass number  = number of protons + neutrons

   Number of protons  = 40 - 21 = 19

In an atom, the number of protons and electrons are the same for charge stability.

 Number of electrons  = 19

Answer:

12 = Lead

13 = red

Explanation:

12:

Given data:

Mass of metal = 143 g

Volume of metal = 12.6 cm³

Identity of metal = ?

Solution:

To check which metal is this we will calculate the density.

Formula:

d =  m/v

d = 143 g/ 12.6 cm³

d = 11.3 g/cm³

The metal is lead.

13:

First of all we will calculate the densities of all liquid. The liquid with the highest density will form the bottom layer.

Blue:

d = m/v

d = 12 g/100 mL

d = 0.12 g/mL

Clear:

d = 10 g/ 100 mL

d = 0.1 g/mL

Red:

d = m/v

d = 15 g/100 mL

d = 0.15 g/mL

Yellow:

d = m/v

d = 13 g/ 100 mL

d = 0.13 g/mL

The density of red liquid is highest from all thus it will form bottom layer.

Answer:

10

Explanation:

Atomic mass subtracted by the atomic number to get your answer

Answer:

Run away from the lion

Explanation:

A lion is a top predator of the Savannah forest, meaning that it feeds on a wide range of prey. According to this question, a zebra grazing in the savannah sees a nearby lion charging to attack and eat the zebra. The first instinct of the Zebra is to RUN AWAY FROM THE LION.

The zebra runs because it does not want to get eaten by the fierce predator, owing to the fact that it does not have the physical strength to withstand the lion in a physical combat.

Answer:

A

Explanation:

The more time given for the water to drip, the more droplets fall, which increase the volume of the water

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Answer:

Please Mark as the Brainliest!!!!! PPPPPPPPPLLLLLLLLLSSSSSS

Explanation:

Across a period, effective nuclear charge increases as electron shielding remains constant. This pulls the electron cloud closer to the nucleus, strengthening the nuclear attraction to the outer-most electron, and is more difficult to remove (requires more energy).

.Answer: Physically, the cell structure of protists and prokaryotes differ. First, the external structures of prokaryotes consist of cell walls made of peptodoglycan. Protists do not have a cell wall, and instead have a semi-permeable plasma membrane in the form of a phospholipid bilayer

Explanation: 1  - Most of the  and all Prokaryotes are unicellular organisms. 2- Prokaryotes lack a proper nucleus and other membrane-bounded organelles while have membrane-bounded nuclei and other organelles.

Answer:

its D

Explanation:

I took the assignment on edg

Answer:

they have freely moving electrons

Answer:

Explanation:

a) 1/2 true: The Alkali metal group has one valence electron but Earth metals have two valence electrons.

b;) true Metals are good conductors because they have many free electrons.

c:)a negative ion has more electrons than protons

d;) metals lose electrons and non-metals gain electrons. metals transfer electrons to nonmetals.

I think B is your best answer.

Answer:

Ice expands

Explanation:

when you freeze water, it expands. so when it freezes in a pipe it cant take the pressure

Answer:

b

Explanation:

Answer: nitrogen (N), antimony (Sb), bismuth (BI)

Explanation:

The elements listed belongs to Group V on the periodic table.

Answer:

The Oxidation State of each atom

Explanation:

Answer:

7. 32neutrons

Explanation:

mass number is equal to number of protons plus the number of neutrons

the atomic number is also known as the number of protons

therefore 59-27=32

Answer:

chloroplast

Explanation:

Answer:

D) Trench

Explanation:

At this boundary, the landform that is most likely to form is trench.

A trench is one of the notable subduction features that occurs as a prominent depression on the earth surface where one plate slides under another.

Answer:

Matter in compound having chemical bonds while in mixture matter have physical interaction.

Explanation:

We know that element is a substance that is made up of atoms. The atoms of different elements combine to form compound. These are the form of matter that have characteristic properties and having fixed chemical composition. The atoms of different elements are combine to gather through the chemical bond.

For example:

Consider the compound water. It has hydrogen and oxygen. Atoms are bonded together through chemical bond and having fixed proportion. So we can say that their interaction is chemical interaction.

While in mixture different matter combined through the physical interaction.

Atoms of different elements are not chemically bonded together.

For example:

Mixture of sand and water.

Mixture of oil and water.

Answer: [Kr] 4d10 5s2 5p5

Answer:

Gravity

Explanation:

Answer:

that something that’s in rest will stay that way until a force moves it. And that a moving object will keep moving until a force stops it.

Explanation:

Answer:

They both are multicellular and Eukaryotes.

Answer:

A chemical change in a substances always alters the chemical composition.

Explanation:

Molecules always are combined to create a new substance, otherwise it would only be a physical change and the substance would have still had the same molecular design.

Answer:

Combustion is a rapid exothermic chemical reaction between oxygen, O₂, and a substance which is known as the fuel that is initiated by an ignition (heat) source to produce carbon dioxide and water vapor other oxides and combustion products

With the continuous model, which is the model seen with the naked eye, that have uniform parts, the combustion of coal that produces no flammable vapors and hence no flame, the combustion of hydrogen gas which is nearly colorless and the combustion of gasoline that produces a bright flame, burns without flame will be taken as different processes

Explanation:

Answer: they would have to be some where else

Explanation: hope this helps a little

Answer:

It starts to excelerate with kinetic energy

Explanation:

Answer:

a

Explanation:

Answer:

(3) kinetic energy

Explanation:

The temperature of a sample of nitrogen gas is a measure of the molecules' average kinetic energy. This is one of the postulate of the kinetic theory of gases.

The temperature of a sample  is a measure of the molecules' average

kinetic energy.

Increase in the temperature of a sample increases the degree of

randomliness and elastic collision of its atoms. We can define kinetic

energy as the type of energy as a result of its motion. Gas have more

kinetic energy as a result of it having the highest temperature while solids

have the lowest.

This explains why temperature is the measure of the average kinetic

energy of an object.

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Answer: 1s= 11

2s=11 2p= 11,11,11

3s=11 3p=11,1,1

Explanation:

The statement, that describes the electrons in the sulfur atom in the orbital diagram is "[tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}[/tex]"

Electron can be referred as subatomic particle containing negative charge on it.

Orbital diagrams are graphical representations of electrons in an atom. Three rules can be used to create orbital diagrams. Each electron, according to the Aufbau Principle, occupies the lowest energy orbital. According to the Pauli Exclusion Principle, only two electrons can fit into a single orbital.

The next two electrons will enter the 2s orbital, followed by the following six electrons, which will enter the 2p orbital because the p subshell can store up to six electrons. The following two electrons will enter the 3s orbital, and the final four electrons will enter the 3p orbital. As an outcome, the Sulphur electron configuration is [tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}[/tex]

Hence the correct answer is [tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}[/tex].

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