The diagram above represents the melting of H2O(s). A 2.00mole sample of H2O(s) at 0°C melted, producing H2O(l) at 0°C. Based on the diagram, which of the following best describes the amount of heat required for this process and the changes that took place at the molecular level?

Explanation:

Orbitals are spaces that have a high probability of containing an electron. ... The s sublevel has just one orbital, so can contain 2 electrons max. The p sublevel has 3 orbitals, so can contain 6 electrons max. The d sublevel has 5 orbitals, so can contain 10 electrons max.

Answer:

There are different energy levels in atoms. There are also different orbitals: there is 1s orbital, 3p orbitals, 5d orbitals and 7f orbitals. Not sure about sub levels...

Explanation:

Answer:

We can't see the options so we don't know what we can put

Explanation:

Answer:

False.

Explanation:

all planets have gravity because if they didnt, the gasses and whatever makes up the planet wouldnt be pulled down to the core of the planet, and it would just be floating around in space.

Answer:

A

Explanation:

bc inorganic compoud refers to all compound that do not contain carbons.

Answer:

space,mass

Explanation:

Answer:

4.031×[tex]10^{23}[/tex]

Explanation:

You first need to calculate the number moles of NO2.  To do this use PV=nRT

STP stands for standard temperature and pressure which is 0 degrees C and 1 atm.

due to that:

P = 1 atm

V = 15 L

R = 0.08206 L*atm/mol*K

T = 273 K

n = unknown moles

solve for n to make the equation n=PV/RT

n=(1atm*15L)/(0.08206 Latm/molK*273K)

n=0.6696 mol of NO2

Then to find the number of molecules we use Avogadro's number which tells us the number of molecules per mol of a molecule or atom.

Avogadro's number is  6.02x10^23 molecules/mol

number of molecules = 0.6696mol × 6.02x10^23 molecules/mol

number of molecules = 4.031×10^23 molecules of NO2

Let me know if anything is not clear or if you get something else in the comments so that we can work it out.

Answer:

C

Explanation:

When a hammer strikes and exerts force on a nail, the nail exerts an equal force back on the hammer. Option C. This is further explained below.

Generally, According to Newton's third law, when two bodies contact, they apply forces to each other that are equal in magnitude and opposing in direction.

In conclusion, Newton’s third law of motion certifies that the nail exerts an equal force back on the hammer.

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Answer:

C

Explanation:

Just look at the reactants.

2AgCl + BaBr2

The first reactant is made of 2 elements.

The second reactant is made of 2 elements.

It can't be a decomposition. At this level there is only one reactant made of 2 elements. Something like

2MgO ===> 2Mg + O2

is a decomposition.  One compound breaking down into 2 elements Mg and O.

It can't be a combustion. One of the reactants in a combustion is oxygen. Those equations look like

C3H8 + 5O2 ==> 3CO2 + 4H2O

That would be what a combustion looks like

It can't be a single replacement. They look like

Mg + CuO ===> Cu + MgO

There are elements on both sides of the reaction.

that leaves a double replacement which I wrote about how you distinguish it.

Answer:

c

Explanation:

Answer:

[tex]\boxed {\boxed {\sf FeBr_3}}[/tex]

Explanation:

We can assume that this is a neutral compound, meaning the charges of the ions are balanced.

We are given: Iron (III) Bromide.

We want to find the chemical formula.

First, find the symbols of the elements.

Next, find the charges on the ions.

The Roman Numeral 3 in parentheses (III). This indicates the iron cation has a charge of +3.

We need to balance out the charge of +3 with the bromine. Bromine can have a charge of +5, +1, and -1. Since we already have a cation (positive ion), bromine must be an anion (negative ion). We also know the charge must be negative to balance out the compound.

But, the charge is only -1. That would still leave the compound unbalanced. Therefore, we must have 3 bromine atoms to balance out the iron. The 3 will become a subscript.

So, put all the information together and write the formula:

FeBr₃

A chemical formula lists the constituent elements of a compound together with the number of atoms in each element's smallest unit, such as a molecule or formula unit. Here the formula for Iron (III) Bromate is FeBr₃.

A compound's chemical composition is symbolically represented by its chemical formula. Chemical formulas reveal the elements that make up a compound's molecules as well as the ratio in which their atoms combine to create those molecules.

The sorts of atoms and their numbers in an element or compound are described by a chemical formula. Each element's atoms are denoted by one or two distinct letters. a collection of chemical symbols indicating the constituent elements and their corresponding ratios.

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longitudinal

all sound waves are longitudinal

the electrons of each atom will be attracted to both nuclii.

Answer:

the surface may become etheir scratchy and soft and that the surface may also be come heated up due to friction

When a surface is experiencing friction with another surface, the surface may become either scratchy and soft and that the surface may also be come heated up due to friction.

When a surface is experiencing friction with another surface, the surface may become either scratchy and soft and that the surface may also be come heated up due to friction.

Projectile motion is a type of motion in which a object is thrown from the surface earth at some angle it will take projectile projection .

In above question a man thrown a object 14 m/sec an it will moves 2 meter.

Then

vsinθ×t−1/2×gt^2=25

where v = initial velocity in m/sec

t = time in sec

g = acceleration due to gravity

14sinθ×1−5×12=25

14sin=30

sin=30/14

sinθ>2 not possible

vsinθt−1/2×gt^2=2

14×sinθ−5=2

14xsinθ=7

Sinθ=7/14

Sinθ=1/2

θ=30 degree

Therefore, When a surface is experiencing friction with another surface, the surface may become either scratchy and soft and that the surface may also be come heated up due to friction.

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Answer:List of isotopes

Nuclide Z Isotopic mass (Da)

Excitation energy

63Cu 29 62.9295975(6)

64Cu 29 63.9297642(6)

65Cu 29 64.9277895(7)

Explanation:

Answer:

actually there are 6 of them

Explanation:

heres the list:

They are beryllium, magnesium, calcium, strontium, barium, and radium.

hope it helpssss :)

Answer/Explanation:

Alkaline earth metals are similar to Alkali Metals, but they tend to to be harder, denser, and less reactive. However it is too reactive to be found in nature. It is commonly found in batteries, fireworks, flashlights, and cameras. It has Valence Electrons of 2 and the elements in this category are:

Answer:

True

Explanation:

Whenever something loses thermal energy, it contracts and becomes smaller.

Answer: it might be true

Explanation:

Answer:

4. one

Explanation:

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. The atomic number of vanadium is 23. The electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³. The noble gas electronic configuration of vanadium is  [Ar]3d³4s². 1,2,3 represents the number of shells and s and represents the orbitals. The superscripts represents the number of electrons in each orbitals.

Therefore, the electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³.

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Answer:

the sun would reflect off of the windows causing less heat to travel into the building

Explanation:

Answer: It is the middle one on the bottom

Explanation:

trust me i just did this question

I believe the crrect answer is B) two

IamSugarBee

Answer:

[tex]$Na_2O + H_2O \rightarrow 2NaOH$[/tex]

Explanation:

When solid sodium oxide reacts with water in a room temperature, it forms sodium hydroxide.

The one word equation of the reaction will show or represent the reactants on the left hand side of the arrow and the products on the reaction on the right hand side of the reactants.

Thus the equation of the reaction is :

[tex]$Na_2O(s) + H_2O(l) \rightarrow 2NaOH(aq)$[/tex]

Sodium oxide + water ----[tex]$\rightarrow$[/tex] sodium hydroxide.

The equation for the chemical reaction should be [tex]Na_2O + H_2O \rightarrow 2NaOh[/tex]

At the time when the solid sodium oxide reacted with the water in room temperature so it created the sodium hydroxide.

Here the one-word equation represents that the reactant should be on the left-hand side while on the other hand, the product should be on the right-hand side.

Also, it should be like

Sodium oxide + water ---- sodium hydroxide.

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Answer:

Concentration of the original [tex]\rm KOH[/tex] solution: approximately [tex]1.05\; \rm mol \cdot dm^{-3}[/tex].

Explanation:

Notice that the concentration of the [tex]\rm HCl[/tex] solution is in the unit [tex]\rm mol\cdot dm^{-3}[/tex]. However, the unit of the two volumes is [tex]\rm cm^{3}[/tex]. Convert the unit of the two volumes to [tex]\rm dm^{3}[/tex] to match the unit of concentration.

[tex]\begin{aligned} V(\mathrm{NaOH}) &= 25.0\; \rm cm^{3} \\ &= 25.0\; \rm cm^{3} \times \frac{1\; \rm dm^{3}}{1000\; \rm cm^{3}} \approx 0.0250\; \rm dm^{3} \end{aligned}[/tex].

[tex]\begin{aligned} V(\mathrm{HCl}) &= 35.0\; \rm cm^{3} \\ &= 35.0\; \rm cm^{3} \times \frac{1\; \rm dm^{3}}{1000\; \rm cm^{3}} \approx 0.0350\; \rm dm^{3} \end{aligned}[/tex].

Calculate the number of moles of [tex]\rm HCl[/tex] molecules in that [tex]0.0350\; \rm dm^{3}[/tex] of [tex]0.75\; \rm mol \cdot dm^{3}[/tex] [tex]\rm HCl\![/tex] solution:

[tex]\begin{aligned}n(\mathrm{HCl}) &= c(\mathrm{HCl}) \cdot V(\mathrm{HCl}) \\ &= 0.00350\; \rm dm^{3} \times 0.75\; \rm mol \cdot dm^{3} \\ &\approx 0.02625\; \rm mol\end{aligned}[/tex].

[tex]\rm HCl[/tex] is a monoprotic acid. In other words, each [tex]\rm HCl\![/tex] would release up to one proton [tex]\rm H^{+}[/tex].

On the other hand, [tex]\rm KOH[/tex] is a monoprotic base. Each [tex]\rm KOH\![/tex] formula unit would react with up to one [tex]\rm H^{+}[/tex].

Hence, [tex]\rm HCl[/tex] molecules and [tex]\rm KOH\![/tex] formula units would react at a one-to-one ratio.

[tex]{\rm HCl}\, (aq) + {\rm NaOH}\, (aq) \to {\rm NaCl}\, (aq) + {\rm H_2O}\, (l)[/tex].

Therefore, that [tex]0.02625\; \rm mol[/tex] of [tex]\rm HCl[/tex] molecules would neutralize exactly the same number of [tex]\rm NaOH[/tex] formula units. That is: [tex]n(\mathrm{NaOH}) = 0.02625\; \rm mol[/tex].

Calculate the concentration of a [tex]\rm NaOH[/tex] solution where [tex]V(\mathrm{NaOH}) = 0.0250\; \rm dm^{3}[/tex] and [tex]n(\mathrm{NaOH}) = 0.02625\; \rm mol[/tex]:

[tex]\begin{aligned}c(\mathrm{NaOH}) &= \frac{n(\mathrm{NaOH})}{V(\mathrm{NaOH})} \\ &= \frac{0.02625\; \rm mol}{0.0250\; \rm dm^{3}}\approx 1.05\; \rm mol \cdot dm^{-3}\end{aligned}[/tex].

Answer:

C. The electrons in each C-F bond will be more attracted to the fluorine atom.

Answer:

D)  single replacement

Explanation:

Given reaction:

         Mg       +           2HCl      →      MgCl₂        +        H₂

The reaction shown above is a single displacement reaction.

In a single displacement reaction, a more reactive atom displaces another from a given compound.

The comparison here is between Mg and H.

On the activity series, Mg is higher and more reactive, it will displace H from the solution of HCl. This

This reaction type is called a single replacement reaction.

Answer:

B.

Explanation:

Velocity: the speed of something given direction

Acceleration: increase or decrease of velocity over time

B is the answer because it is the only point on the image that has to slow down and change direction. To turn, a vehicle must slow down so it doesn't skid. Hope this helps!

A race car traveling around the racetrack at a constant speed of 150km/hr at B point on the track is the car accelerating.

Acceleration is the rate at which an object's velocity with respect to time changes. They are vector quantities, accelerations. The direction of the net force applied on the item determines the object's acceleration.

An item has positive acceleration if it is accelerating and travelling in the right direction. Positive acceleration was demonstrated in the first case by the fast automobile.

The acceleration is in the same direction as the car's motion since it is moving ahead and speeding up.

The equation a = v/t denotes acceleration ( a ), which is the change in velocity ( v ) over the change in time ( t ). This enables you to calculate the change in velocity in meters per second squared  ( m/s² ).

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Answer:

yes I do

But I can't see the question very well

Explanation: