How is the delta H fusion used to calculate the energy released when a volume of liquid freezes

Answer:

I believe its preferred to as "Laughing Gas." It's also called, Nitrous Oxide.

Answer: :Change in thermal energy = mass x specific heat capacity x change in temperature.

Explanation: what it basically means is mass x heat x the change in temperature.

Answer:

The stigma on the underside of the leaf allows Gas and Water Vapour to move in and out of the leaf

Answer:

hydrogen bonding, hope this helps

Explanation:

Answer:

A saturated solution may not be a concentrated solution IF the solute is only sparingly or slightly soluble in the solution.

If a cell is placed in a hypertonic solution, water will leave the cell, and the cell will shrink.

Osmosis is the net movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

This may sound odd at first, since we usually talk about the diffusion of solutes that are dissolved in water, not about the movement of water itself.

If a cell is placed in a hypertonic solution, water will leave the cell, and the cell will shrink.

In an isotonic environment, there is no net water movement, so there is no change in the size of the cell.

When a cell is placed in a hypotonic environment, water will enter the cell, and the cell will swell.

Therefore If a cell is placed in a hypertonic solution, water will leave the cell, and the cell will shrink.

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Explanation:

Evolution is a biological process. It is how living things change over time and how new species develop.

Answer: It’s B

Explanation:

Answer:  The modern atomic theory states that atoms of one element are the same, while atoms of different elements are different. Each element has its own characteristic atomic number. Atoms of the same element can have different numbers of neutrons, however.

Explanation: N/A

Answer:

2,3-dimethyl pentane.........

HCl(acid)+C₄H₈ (butene)⇒ addition reaction

name of the product: 2-cloro butane

Answer C

Explanation: the solute will be sugar and the solvent will be water :)

Answer:

B .it is an exothermic reaction

Explanation:

i need brainleyest

This question involves the concept of binding energy.

The amount of energy released by this reaction is "a) 1.22 x 10¹³ m/s".

The amount of energy that is released during the radioactive decay of any element is known as binding energy. This can be given by using the following formula:

[tex]E=\Delta mc^2[/tex]

where,

Therefore,

E = (1.35 x 10⁻⁴ kg)(3 x 10⁸ m/s)²

E = 1.22 x 10¹³ m/s

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The littoral zone of a lake is the area closest to the shore. It has very little biological activity but includes a lot of oxygen. The water in the lake's littoral zone is freshwater, free of living organisms such as plants and fish.

Answer:

A restoration

Explanation:

the action of returning something to a former owner, place, or condition.

If it's not preservation then it's it's reservation.

Answer: plastic

Explanation:

The thermal conductivity of a material is highly depending on composition and structure. Generally speaking dense material such as medals and stone are good conductors of heat while load density substances such as gas and porous installations are poor conductors of heat

Answer:

Or plastic

Explanation:

May be useful................

Answer:

Explanation:

Answer: 1.380 × 10^-8 M

The pH is the measure of alkalinity or acidity of a substance.

It is the negative logarithm of H+ ions concentration [H+].

pH = -log[H+]

pOH on the other hand is negative logarith of OH- concentration [OH-].

pOH = -log[OH-]

In this case;

pOH = 7.86

We can calculate the [OH-]

pOH = -log[OH-]

But, pOH = 7.86

pOH = -log[OH-]

-log[OH-] = 7.86

[OH-] = Antilog -7.86

      = 1.380 × 10^-8 M

Therefore, [OH-] is 1.380 × 10^-8 M

Answer:

They both go backward because of force.

Explanation:

The logic behind this answer is that child right and pushes away causing her to go backward meaning her partner is being pushed backwards to.

(Hope this was helpful!)

Functional groups are the specific groups that provide characteristic properties. The compounds are butanoic acid and methyl propanoate.

Functional groups are the active side atoms and molecules that confer the physical and chemical properties of the compound. In the first compound, the functional group is the carboxylic acid (COOH) and four carbon atoms hence, the compound is butanoic acid.

In the second compound, the functional group is an ester (RCOOR) and contains a methyl group and other three carbon atoms making the compound, methyl propanoate.

Therefore, the compounds are butanoic acid and methyl propanoate.

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The best radioisotope to use in powering planet and space exploration is plutonium-239 since it has the longest half-life of 21400 years.

The half-life ofa radioactive element is the time it takes for half the amount of atoms in the element to spontaneously decay.

The half-life of radioactive elements vary.

The half life of the given radioactive elements are as follows:

Therefore, the best radioisotope to use in powering planet and space exploration is plutonium-239 since it has the longest half-life of 21400 years.

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Answer:

D. ) Plutonium-239

Answer:

Ashley, Ron, and Lindsay

Explanation:

Ultrasound technology is used for medical purposes by a scanning machine that allows to obtain living images of the inside of the body. For the type of issues they are going trough, ultrasound technology would help patients Ashley, Ron, and Lindsay. Ashley's under-developing fetus, Ron's kidney stones and, Lindsay's uterus cancer can be monitored by using ultrasound technology.

The ultrasound technology is a medical tool which can help a physician to evaluate, diagnose and treat medical conditions. Here the patients  with Ron, and Lindsay kidney stones and cancer can be detected by ultrasound technology. The correct option is D.

A term for the disease in which the abnormal cells divide without control and can invade nearby tissues is defined as cancer. The cancer cells can also spread to the other parts of the body through the blood and lymph systems.

Kidney stones are the hard deposits made of minerals and salts which form inside our kidneys. It is mainly caused due to little drinking of water, obesity, eating food with high salt or sugar content.

The ultrasound technology can detect cysts, tumors, obstructions or infections within or around your kidneys. It is also used by the medical professionals for many purposes including the pregnancy related problems.

Thus the correct option is D.

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Answer:

ethanol

Explanation:

it is a thermometric liquid

Propanal and acetone are the IUPAC names for the chemical.

Propanal, commonly known as propanaldehyde, is an aldehyde with one double bond and one oxygen atom.

Acetone is a ketone compound. R2CO is the functional group of ketones.

Thus, Propanal and acetone are the IUPAC names for the chemical.

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Answer:

D. K3PO4

Explanation:

K3PO4 would dissolve into 3 potassium ions and one phosphate ions thus total of 4 items added in water. Freezing point is depressed by high amounts of stuff. NaCl would add 2 items (one Na and one Cl). Glucose would not break apart, thus 1 item. MgCl2 would break into One Mg and two Cl ions (thus 3 things.)..

Overall, K3PO4 dissolves into most components, thus would depress the freezin point most.

5 mols of O_2 need 4 mol NH_3

Now

Moles of Ammonia

Moles of NO=0.3mol

Mass of NO

So

Moles of Oxygen

Remaining moles

Mass

Yield

Answer:

1.11 g

Explanation:

From the answer you're given that HCl is the limiting reactant.

Mg + 2HCl -> MgCl2 + H2

40.0 g

First of all you want to know the moles of HCl you actually have:

40.0 g HCl x  [tex]\frac{1 moles of HCl}{36.45 g/mol}[/tex] = 1.09739 moles of HCl.

Where 36.45 is the molar mass of H (1.008) + Cl (35.45).

Since the limiting reactant is HCl you'll have to discover how much H2 is produced from the limited quantity of reactant you have:

1.09739 moles of HCl x  [tex]\frac{1 moles of H2}{2 moles of HCl}[/tex] = 0.54869 moles of H2 is produced

Now you have to simply convert the moles of H2 in grams:

0.54869 moles of H2 x 2.016 g/mol H2 = 1.106 g

Where 2.016 is the molar mass of H2.

Theoretical yield of hydrogen atom is produced in 2Hcl mg , mgcl₂ and h₂ if 40.0 g of Hcl react with an excess of magnesium is 1.096 moles.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.

Theoretical yield of hydrogen atom is calculated by using mass amd molar mass of an atom.

2Hcl + mg---> MgCl₂ + H₂

The theoretical yield of hydrogen is calculated as follows

mass/molar mass

40 ÷ 36.5 = 1.096 moles

by use of mole ratio of Hcl to H2 which is 2:1

moles of H2 = 1.096 ÷ 2 = 0.548moles

mass is therefore =  moles x molar mass

that is 0.548moles x 2 = 1.096 grams

Hence, the theoretical yield of hydrogen atom is 1.096 grams.

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Answer:

Below•

Explanation:

Fossil Fuel: It's a natural gas based on natural materials such as coal.

Biomass: It's the total weight of substance.

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