Which watershed drains into Chesapeake Bay?
Label A
Label B
Label C
Label D

Answer:

Explanation:

The two electrons in the outer orbit, together with the other negatively charged electrons, repel each other and that make the diameter of the O^2- ion larger.

Answer:

A; deciduous

Explanation:

Trees that lose all of their leaves for part of the year are known as deciduous trees. Those that don't are called evergreen trees. Common deciduous trees in the Northern Hemisphere include several species of ash, aspen, beech, birch, cherry, elm, hickory, hornbeam, maple, oak, poplar and willow

Answer:

the answer is decidous trees

Answer:

The molarity of MgCl₂ in water is 0.088 mol/L.

Explanation:

The molarity of MgCl₂ can be calculated as follows:

[tex] C = \frac{\eta}{V} = \frac{m}{MV} [/tex]

Where:

C: is the molarity =?

η: is the number of moles of MgCl₂ = m/M

V: is the volume of water = 500 mL = 0.500 L

m: is the mass of MgCl₂ = 4.18 g

M: is the molar mass of MgCl₂ = 95.211 g/mol

Hence, the molarity is:

[tex] C = \frac{m}{MV} = \frac{4.18 g}{95.211 g/mol*0.500 L} = 0.088 mol/L [/tex]

Therefore, the molarity of MgCl₂ in water is 0.088 mol/L.

I hope it helps you!

Answer: There are 0.499 moles present in [tex]3.01 \times 10^{23}[/tex] molecules of Boron trichloride.

Explanation:

According to mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of a substance.

Hence, number of moles present in [tex]3.01 \times 10^{23}[/tex] molecules are as follows.

[tex]Moles = \frac{3.01 \times 10^{23}}{6.022 \times 10^{23}}\\= 0.499 mol[/tex]

Thus, we can conclude that there are 0.499 moles present in [tex]3.01 \times 10^{23}[/tex] molecules of Boron trichloride.

Answer:

The energy of a wave is inversely proportional to the wavelength of the wave.

As wavelength increases, the energy of the wave decreases.

As wavelength decreases, the energy of the wave increases.

Explanation:

The energy of a wave is directly proportional to the wave's frequency. As frequency increases, so does the energy of the wave.

[tex]E\propto f[/tex] (energy [tex]E[/tex] is proportional to frequency [tex]f[/tex])

How is this related to wavelength?

Frequency is inversely proportional to wavelength. That means that as frequency increases, wavelength decreases and as frequency decreases, wavelength increases.

[tex]f\propto \frac{1}{\lambda}[/tex] (frequency [tex]f[/tex] is inversely proportional to wavelength [tex]\lambda[/tex])

Therefore, as wavelength increases, the energy of a wave decreases and as wavelength decreases, the energy of a wave increases.

[tex]E\propto f\propto \frac{1}{\lambda}[/tex]

Forming an Ion Ionic bonds are a class of chemical bonds that result from the exchange of one or more valence electrons from one atom, typically a metal, to another, typically a nonmetal. This electron exchange results in an electrostatic attraction between the two atoms called an ionic bond.

Answer:

proton

A proton is composed of two up quarks, one down quark, and the gluons that mediate the forces "binding" them together.

Answer:

Acids have a pH less than 7. Acids contain lots of hydrogen ions

Alkalis have a pH greater than 7. Alkalis contain lots of hydroxide ions

Please mark as brainliest if answer is right

Have a great day, be safe and healthy  

Thank u  

XD

Answer:

ACID - A substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind. Often contrasted with alkali and base.

ALKALIS - A compound with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids; typically, a caustic or corrosive substance of this kind such as lime or soda: Often contrasted with acid and base.

Hope this helps

Answer:

im not sure

Explanation:

Answer:

Bases

Explanation:

Most soaps fall under the base category as they are slippery and will taste bitter if you taste it (DONT TRY IT THO).

Answer:

[tex]V_2=0.87L[/tex]

Explanation:

¡Hola!

En este caso, al considerar la información dada, inferimos que este problem se resuelve aplicando la ley de Charles, dado que tenemos una relación entre el volume y la temperatura:

[tex]\frac{V_2}{T_2}=\frac{V_1}{T_1}[/tex]

Así, despejamos V2 (volumen final) y obtenemos:

[tex]V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{0.5L*473.15K}{273.15K}\\\\V_2=0.87L[/tex]

Saludos!

Answer:

1.204 × 10^24 formula units

Explanation:

Using the following formula to convert mass of iron (III) chloride to moles;

mole = mass/molar mass

Molar mass of FeCl3 = 56 + 35.5(3)

= 56 + 106.5

= 162.5g/mol

Mole = 325/162.5

mole = 2mol

Next, to calculate the formula units of FeCl3, we multiply the number of moles of FeCl3 by Avagadro number (6.02 × 10^23)

Formula units of FeCl3 = 2 × 6.02 × 10^23

12.04 × 10^23

= 1.204 × 10^24 formula units.

Answer:

76.1g

Explanation:

The balanced equation for this reaction is as follows:

3NaOH + AlCl3 --> Al(OH)3 + 3NaCI

From the above equation, it can be observed that 1 mole of AlCl3 is needed to produce 3 moles of NaCl.

Using the formula below, we convert the mass of NaCl to moles;

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

mole = 100/58.5

mole = 1.71mol of NaCl

Since 1 mole of AlCl3 is needed to produce 3 moles of NaCl.

Then 1.71 moles of NaCl will be produced by 1.71/3 = 0.57mol of AlCl3

Molar mass of AlCl3 = 27 + 35.5(3)

= 27 + 106.5

= 133.5g/mol

Mole = mass/molar mass

Mass = molar mass × mole

Mass = 133.5 × 0.57

Mass = 76.1g

the Answer is             502 Joules

Answer:

3040 mmHg

Explanation:

Here

we have to convert 4.00 atm to mmHg

As we know that

The number of atm in 1 mmHg is 0.0013157895567935

Now there is 4.00 atm So, in mmHg it would be

And, according to this, the working is given below:

= 4 ÷ 0.0013157895567935

= 3,039.99

= 3040 mmHg

Hence, the last option is correct

And, the same is relevant and considered too

Answer:

Molarity of 40 ml of NaoH is 0.3125 mL

Explanation:

As we know  

Molarity of acid *  volume of acid = molarity of base * volume of base

Substituting the given values, we get  

[tex]0.5 * 25 = X* 40 \\X = \frac{0.5*25}{40} \\X = 0.3125[/tex]

Molarity of 40 ml of NaoH is 0.3125 mL

Answer:

6.22 mol

Explanation:

I think so but I don't know just yet

sorry if im wrong

Answer:

D. 7-methyl-3-octyne

Explanation:

1) Identify the parent chain and name it like an alkane.

• The longest chain of carbons, which consists of the functional group (which is the alkyne group in this case: C≡C).

• There are 8 carbons in the longest chain, so it is called an octane.

2) Now, identify the location of the functional group.

• The location number of the functional group should be as low as possible. Thus although we could count from the right, we start counting from the left since the functional group is closer to the left. From the left, the functional group would be at carbon 8 while from the left, it is on carbon 3.

• Replace 'ane' with 'yne' in octane for the alkyne group.

• This would give us 3-octyne.

3) Lastly, add in the name of the branch.

• Here we have one branch, -CH₃. This is read as methyl.

• Identify the location number of the branch by counting the number of carbons in the same direction as when we counted the location number of the functional group. The methyl branch has a location number of 7.

• Adding the name of the branch before the parent chain, we would arrive at 7-methyl-3-octyne as the IUPAC name of the alkyne.

Further Explanation:

A) This option is incorrect as there are only 8 carbons in the parent chain. Although there are 9 carbons in total, the 9th carbon is taken care of in '7-methyl'.

B) Location number of the functional group should be as low as possible, so start counting the number of carbons from the left!

C) Since the functional group is an alkyne, the word 'octane' should be 'octyne' instead.

Answer:

1077.3 molecular in 1.05*1026 molecules

Answer:

[tex]\boxed {\boxed {\sf x \approx 1.34 \ atm}}[/tex]

Explanation:

Since we are dealing with temperature and pressure, we must use Boyle's Law. This states that the pressure is inversely proportional to the volume. The formula is:

[tex]P_1V_1=P_2V_2[/tex]

Where P is the pressure and V is the volume.

We know the original pressure (P₁)  of the gas is 1.20 atmospheres and the volume (V₁) is 2.45 liters.

[tex]1.20 \ atm * 2.45 \ L = P_2V_2[/tex]

We also know the gas is contracted to a new volume of 2.20 liters (V₂) , but we do not know the pressure (P₂). We can use x.

[tex]1.20 \ atm *2.45 \ L = x * 2.20 \ L[/tex]

We can solve the left side of the equation and multiply.

[tex]2.94 \ atm *L= x*2.20 \ L[/tex]

We are trying to find the new pressure (x), so we must isolate the variable. It is being multiplied by 2.20 liters. The inverse of multiplication is division, so we divide both sides by 2.20 L.

[tex]\frac {2.94 \ atm *L}{2.20 \ L}=\frac{x*2.20 \ L}{2.20 \ L}[/tex]

[tex]\frac {2.94 \ atm *L}{2.20 \ L}=x[/tex]

The units of liters cancel.

[tex]\frac {2.94 \ atm}{2.20 \ }=x[/tex]

[tex]1.33636363636 \ atm =x[/tex]

The original measurements have 3 significant figures, so our answer should have the same. For the number we found, that is the hundredth place.

The 6 in the thousandth place tells us to leave the 3 in the hundredth place.

[tex]1.34 \ atm \approx x[/tex]

The new pressure is approximately 1.34 atmospheres.

Answer:

Gravity

Explanation:

Sir Isaac Newton was an English mathematician and mathematician and physicist who lived from 1642-1727. The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature.

Answer:

A. Gravity

Explanation:

because Isaac Newton published a comprehensive theory of gravity in 1687. Though others had thought about it before him, Newton was the first to create a theory that applied to all objects, large and small, using mathematics that was ahead of its time.

Answer:

6atm

Explanation:

Using Boyle's law equation as follows;

P1V1 = P2V2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (L)

V2 = final volume (L)

Based on the information provided in this question;

P1 = 2 atm

P2 = ?

V1 = 3L

V2 = 1L

Using P1V1 = P2V2

2 × 3 = P2× 1

6 = P2

P2 = 6atm

The new pressure of the balloon is 6 atm.

Answer:

yes

Explanation:

Answer:

578.....882...767..86

Answer:

We are to name the compound:

Assuming carbon is represented by the big gray atoms while the smaller ones represents hydrogen atoms and the the red atom represents oxygen, the chemical formula of the compound is:

CH3CH2CH2OH

Answer:

First Blank: 656.3 kJ

Second Blank: Endothermic

Explanation:

Edge 21'

Answer:

1.  656.3

2.  endothermic

Explanation:

Answer:

An F1 offspring could produce four types of gametes, RY, Ry, rY, and ry. The F2 generation supports the independent-assortment model and refutes the linkage model.

Explanation:

Answer:

Final temperature = [tex]43.53^{\circ} C[/tex]

Explanation:

Given that,

Heat added, Q = 250 J

Mass, m = 30 g

Initial temperature, T₁ = 22°C

The Specific heat of Cu= 0.387 J/g °C

We know that, heat added due to the change in temperature is given by :

[tex]Q=mc\Delta T\\\\Q=mc(T_2-T_1)\\\\\dfrac{Q}{mc}=(T_2-T_1)\\\\T_2=\dfrac{Q}{mc}+T_1[/tex]

Put all the values,

[tex]T_2=\dfrac{250}{30\times 0.387}+22\\\\=43.53^{\circ} C[/tex]

So, the final temperature is equal to [tex]43.53^{\circ} C[/tex].

Answer:

food doesn't spoil as fast when it is refrigerated because  it would be at  room temperature. Because of the lowered temperature, there are less collisions, which slows down the reaction! Due to decomposition reactions with oxygen or carbon dioxide in the air, meat begins to feel slimy and smell spoiled.  and member mark me as brainliest

Answer:

A lower temperature slows down the reactions in the food because there are less collisions. The chemical breakdowns and microorganism activity can't work as fast as it used to because of the cold.