Answer this with work

Answer: D is correct

Explanation: I took the exam

The diagram best shows the transfer of thermal energy that takes place when an instant cold pack cools its surroundings is option D.

The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted across various systems and how work is performed in the process.

Since they both include power produced by heat, the terms thermal energy and heat energy are frequently used interchangeably. Heat, on the other hand, is the transfer of thermal energy, whereas thermal energy refers to the stored or total internal energy of a system's temperature. The average kinetic energy of an object is its temperature.

Utilizing thermal energy productively includes a variety of processes, including baking, chilling, smoking, drying, heating, and manufacturing.

Thus, option D is correct.

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Answer:

Mass of 1 litre of this gas at 273 degree Celsius and 1140 mm Hg pressure is

3 grams. So, (T1) = (273 + 273) degree Absolute = 546 degree Absolute and

(P1) = (760 + 1140) mm Hg = 1900 mm Hg and (V1) = 1 Litre

First, we have to find out how much volume does it occupy at NTP; (T2) = 273 degree Absolute and (P2) = 760 mm Hg.

So, (V2) = (1900*1 / 546)*(273 / 760) = 1.25 litre.

So, the mass of 1.25 litre volume of this gas = 3 grams

Therefore, the mass of 22.4 litre volume of this gas = (3*22.4 / 1.25) grams

= 53.76 grams.

So, the gram molecular mass of the gas is 53.76.

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Answer:

Outer electrons.

Explanation:

All bonds are localized bonds formed between two atoms by the donation of electrons from each atom.

Answer:

a

Explanation:

The molecules of a substance formed a rigid repeating crystal structure. Then, a phase change occurred. That structure is now more like clusters of molecules moving past one another this change is caused by condensing phase.

The transformation of water vapor into liquid is known as condensation. The process is the opposite of evaporation, in which liquid water turns into a vapor. Either the air is chilled to its dew point or it gets too saturated with water vapor to retain any more water, causing condensation to occur.

By removing and transferring heat from the vapor to a cooling medium, condensation is the process by which a substance goes from its vapor phase to its liquid phase. The vapor must be saturated for the process to begin as well as having its vaporization heat reduced.

Thus, option A is correct.

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Answer:

C

Explanation:

Alleles being more minute than genes,can pass on trait similar or different

Answer:

C. The hand shears because their shorter handles transfer force more quickly to the cutting blade.

Explanation:

Answer:

1 mole of carbon.

Explanation:

Answer:

yoooo si se puede jejeje

Explanation:

Answer:

Explanation:

hola como esta yo tan biene es  aburrido

Answer:

Explanation:

Na2O has 2 atoms of Sodium and 1 atom of Oxygen

So, the molecular mass of Na2O is:

(2 x Atomic weight of Na) + (1 x Atomic weight of O)

Atomic weight of Na = 22.99 g

Atomic weight of O = 16 g

Therefore, Molecular Mass of Na2O = (2x 22.99g) + (1 x 16g)

= (45.98 + 16)g = 61.98 g

Therefore 61.98 g of Na2O contains 6 x 10^23 molecules (Avogadro's number).

24.6 g of Na2O therefore contains:

(24.6/61.98) x 6 x 10^23 = Answer!

D. 1-butyne.

The name of this molecule is 1-butyne.

The name of this molecule is 1-butyne. D is correct.

IUPAC nomenclature of organic chemistry is a method of naming organic chemical compounds as given by the International Union of Pure and Applied Chemistry (IUPAC).

There are 3 main parts of IUPAC nomenclature -

1. Prefix

2. Root word

3. Suffix

We have to select the longest continuous chain in a compound and give prefixes as the substituents. Root word will the part which depends on no. of carbon atoms such as meth or eth. And in suffix we focus on type of carbon chain whether it is saturated or not and also the functional group.

Here, we can say that the numbering will be started from the carbon having triple bond and it is present at first position.

Therefore, The name of this molecule is 1-butyne. D is correct.

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Answer:

B

Explanation:

Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.

Answer:

solution A

Explanation:

it is because solution A has a pH of 2.0 and solution B has the pH of 5.0 and also whose number is greater than the solution A .That is why it is acidic

Answer:

mass

Explanation:

mass is weight mass is weight mass is weight

Answer:

A common characteristic of most Alkali Metals is their ability to displace H2(g) from water. This is represented by their large, negative electrode potentials. In this event, the Group 1 metal is oxidized to its metal ion and water is reduced to form hydrogen gas and hydroxide ions. The general reaction of an alkali metal (M) with H2O (l) is given in the following equation:2M(s)+2H2O(l)⟶2M+(aq)+2OH−(aq)+H2(g)(1)

Explanation:

Answer: i dont understand

Explanation:

Question

What is the name of this ben zene ?

the name of this benzene is benzene circle

if you also don't understand the go in this link

https://en.m.wikipedia.org/wiki/File:Benzene_circle.svg

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Answer:

NH4+ is the conjugate acid of the base NH3.

Explanation:

Answer:

When chlorine water is added to potassium bromide solution, chlorine will displace the bromine from the salt solution. The chlorine will be REDUCED (gain electrons) to chlorine ions. The bromide ions will be OXIDISED (lose electrons) to become bromine. The bromine will turn the solution orange.

Explanation:

HAVE A GOOD DAY

Answer:

Option 2: X is the screening constant, & it remains constant across a period.

Explanation:

I took the test and got the question correct :)

As we move across the period, X is the screening constant, and it remains constant across a period.

As we move across the period, the size of atoms become smaller because of an increase in the size of the nuclear charge. This leads to a decrease in atomic radius.

As the size of atom decreases, the screening effect on the outermost electron decreases accordingly. Hence, as we move across the period, X is the screening constant, and it remains constant across a period. This is because, no new shells are added across the period.

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Answer:

0.25M

Explanation:

acording to M1V1/M2V2=n1/n2

The substance which completely consumed in a chemical reaction are known as Limiting reagents. Hence, option (1) is the correct option.

It is the reactant in a chemical reaction that gets consumed first in a chemical reaction and therefore limits how much product can be formed, Thus, known as Limiting reagent.

Hence, The substance which completely consumed in a chemical reaction are known as Limiting reagents. Hence, option (1) is the correct option.

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Answer:hey man hey man

Explanation:

ooo she fine  

Answer:

Moving two particles of the opposite charge close together.

Explanation:

Think about it.

Opposites attract.

When you attempt to move particles with the same charges, a force is created.

Answer:

naphthalene aka mothball sublimes

Answer:

water

Explanation:

the reason I think water is because water is probably the only source of nutrients which breaks down to energy

Answer:

Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.

Answer:

4.285 L of water must be added.

Explanation:

Hello there!

In this case, for this dilution-like problems, we need to figure out the final volume of the resulting solution so that we would be able to obtain the correct volume of diluent (water) to be added. In such a way, we can obtain the final volume, V2, as shown below:

[tex]M_1V_1=M_2V_2\\\\V_2=\frac{M_1V_1}{M_2}[/tex]

Thus, by plugging in the initial molarity, initial volume and final molarity (0.587 M) we obtain:

[tex]V_2=\frac{3.4M*0.895 L}{0.587M}\\\\V_2=5.18L[/tex]

It means we need to add:

[tex]V_{H_2O} ^{added}=5.18L-0.895L=4.285L[/tex]

Of diluent water.

Regards!

Answer:

pOH = 3.18

Explanation:

The equilibrium of a weak base as NX3 is:

NX3(aq) + H2O(l) ⇄ HNX3⁺(aq) + OH-(aq)

Where the equilibrium constant, Kb, is:

Kb = 2.5x10⁻⁶ = [HNX3⁺] [OH-] / [NX3]

As both HNX3⁺ and OH- ions comes from the same equilibrium, their concentrations are the same, that is:

[HNX3⁺] = X

[OH-] = X

And: [NX3] = 0.175M:

2.5x10⁻⁶ = [X] [X] / [0.175M]

4.375x10⁻⁷ = X²

X = 6.61x10⁻⁴M = [OH-]

As pOH = -log [OH-]