Which law is that pls hellp

Answer:

109.5°, 120°, 109.5°

Explanation:

The bond angles that are marked as a, b and c in the given molecules is in the order of :

Angle a : 109.5°

Nitrogen is [tex]$sp^3$[/tex] hybridized and the geometry is tetrahedral. So the bond angle is 109.5°

Angle b : 120°

Carbon is [tex]$sp^2$[/tex] hybridized, so the shape is trigonal planer and the bond angle is 120°

Angle c : 109.5°

Carbon is [tex]$sp^3$[/tex] hybridized and the geometry is tetrahedral. The bond angle is 109.5°

Answer:

your mile-time for tuesday would be shorter compared to your mile-time for monday

Explanation:

Answer: Your time on Tuesday would be different because your body has improved from a simple exercise on Monday, allowing your speed to increase; meaning your time will be much faster.

Explanation:

Answer:

exothermic

Explanation:

Answer:

3) Q = -836.8 J.

4) Q = 950J.

Explanation:

Hello there!

In this case, for those calorimetry problems, we use the general equation:

[tex]Q=mC\Delta T[/tex]

Thus, we proceed as follows:

3) Here, the temperature difference is from 80 °C to 40 °C, the mass is 5.0 g and the specific heat 4.184 in SI units; thus, the heat is calculated as follows:

[tex]Q=(5g)(4.184\frac{J}{g\°C} )(40\°C-80\°C)\\\\Q=-836.8J[/tex]

4) Here, the temperature difference is from 100 °C to 200 °C, the mass is 5.0 g and the specific heat about 1.90 in SI units; thus, the heat is calculated as follows:

[tex]Q=(5g)(1.90\frac{J}{g\°C} )(200\°C-100\°C)\\\\Q=950J[/tex]

Regards!

Answer:

8.87 atm

Explanation:

From the question given above, the following data were obtained:

Volume (V) = 5 L

Number of mole (n) = 6 moles

Temperature (T) = 90 K

Gas constant (R) = 0.821 atm.L/Kmol

Pressure (P) =?

The pressure inside the container can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

P × 5 = 6 × 0.0821 × 90

P × 5 = 44.334

Divide both side by 5

P = 44.334 / 5

P = 8.87 atm

Therefore, the pressure inside the container is 8.87 atm

Explanation:

M(Bapo3) = 216m/mol

n = 3.8 mole

m = M × n = 216 × 3.8 = 820.8g

The characteristic of an element that differs between isotopes is the Mass (Option b).

Isotopes are elements that exhibit an equal atomic number but distinct nucleonic number.

Isotopes contain different numbers of protons in their atomic nuclei (atomic weight).

In conclusion, the characteristic of isotopes is the Mass (Option b).

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Answer:

0.086

Explanation:

The formula for calculating the fraction of a covalent bond can be expressed as:

= exp (-0.25ΔE²)

[tex]= exp[-0.25(E_{Al}-E_{p})^2]---(1)[/tex]

from the equation above;

[tex]E_{Al}[/tex] = the electronegativity of aluminum

[tex]E_P[/tex] = electronegativity of phosphorus

Using the data from periodic table figures;

[tex]E_{Al}[/tex] = 1.5

[tex]E_P[/tex] = 2.1

∴

fraction of the covalent = exp[-0.25(1.5 - 2.1)²]

fraction of the covalent = exp(-0.09)

fraction of the covalent = 0.914

Now, the fraction of ionic bond will be = 1 - the fraction  of covalent bond

= 1 - 0.914

∴

the fraction of bond that is ionic = 0.086

Answer:

B. strong base titration with a strong acid

Answer:

2-pentene

Explanation:

The name of the alkene is 2 pentene. The correct option is B, 2-pentene.

Alkenes with the chemical formula [tex]C_5H_10[/tex] are known as pentene. Within its molecular structure, each has one double bond.

The given alkene [tex]CH_3CH = CHCH_2CH_3[/tex] is 2-pentene because the double bond is present in the second carbon and it's pentene because there are five carbons present.

Thus, the correct option is B. 2-pentene.

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Answer:

i-When lead nitrate is heated, it decomposes into lead oxide (PbO), nitrogen dioxide (NO2), and oxygen gas (O2). The type of this reaction is thermal decomposition reaction.

Answer:

Explanation:

Thank you for providing the graph which was missing in the question!

D is the correct answer because a catalyst will speed up a chemical reaction. In an exothermic reaction as shown, the catalyst also enhances the reaction so that more energy is given out.

D. The pathway A-C-D involves a catalyst and is faster than A-B-D.

because a catalyst will speed up a chemical reaction.

In an exothermic reaction as shown, the catalyst also enhances the response so that more energy is given out.

A catalyst is a substance that speeds up a chemical reaction or lowers the temperature or pressure needed to start one, without itself being consumed in the course of the reaction. Catalysis is the process of adding a catalyst to facilitate a reaction.

A chemical catalyst is a substance that causes a chemical reaction to take place in a special way than it would happen without that catalyst. as an example, a catalyst should cause a reaction between reactants to happen at a faster rate or at a lower temperature than would be possible without the catalyst.

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Answer: A.) 2 is the answer.

Explanation:

Answer:

643g of methane will there be in the room

Explanation:

To solve this question we must, as first, find the volume of methane after 1h = 3600s. With the volume we can find the moles of methane using PV = nRT -Assuming STP-. With the moles and the molar mass of methane (16g/mol) we can find the mass of methane gas after 1 hour as follows:

Volume Methane:

3600s * (0.25L / s) = 900L Methane

Moles methane:

PV = nRT; PV / RT = n

Where P = 1atm at STP, V is volume = 900L; R is gas constant = 0.082atmL/molK; T is absolute temperature = 273.15K at sTP

Replacing:

PV / RT = n

1atm*900L / 0.082atmL/molK*273.15 = n

n = 40.18mol methane

Mass methane:

40.18 moles * (16g/mol) =

Answer:

0.004235 M

Explanation:

The neutralization reaction of this question is given as follows:

Mg(OH)2 + 2HCl → MgCl2 + 2H2O

Using the formula below:

CaVa/CbVb = na/nb

Where;

Ca = concentration of acid (M)

Cb = concentration of base (M)

Va = volume of acid (mL)

Vb = volume of base (mL)

na = number of moles of acid = 2

nb = number of moles of base = 1

From the information provided in this question;

Ca = ?

Cb = 0.00125 M

Va = 425 mL

Vb = 720 mL

na (HCl) = 2

nb = (Mg(OH)2) = 1

Using the formula; CaVa/CbVb = na/nb

Ca × 425/0.00125 × 720 = 2/1

425Ca/0.9 = 2

472.2Ca = 2

Ca = 2/472.2

Ca = 0.004235 M

Answer:

It's

Explanation:

Pbo + c

= pb + co2

While balancing it becomes

2pbo + c = 2pb + co2

(I was also doing same qn)

Answer:

20auhhdkdkkdJkrijsuofsyo

Answer:

well please answer me it's question too after you get it

Explanation:

i am also stucked in that question

No. of molecules of any substance is one mole

= Avogadro's Number = (6.022 x 10^23)

So, no. of molecules in 7.2 moles of sodium fluoride

= 7.2 × (6.022 x 10^23)

= 4.33584^24

Answer:

Molecule

Explanation:

N=N

the answer is liquid

Explanation:

Coz liquid is better than anyone else about the league Now guys are u doing anything for the link to know

Explanation:

Write the balance equation for the reaction taking place:

CO(g) + 2H2(g) ==> CH3OH ... balanced equation

Find the limiting reactant:

Because according to the balanced equation it takes 2 moles H2 for every 1 mole CO, there isn't enough H2, so it is limiting and will dictate how much CH3OH can be made.

Mass of CH3OH produced = 0.75 moles H2 x 1 mol CH3OH / 2 mol H2 x 32 g CH3OH / mol = 12 g CH3OH

Answer:

9.2375 grams of lithium carbonate is required to prepare 500.0 mL of a 0.250 M Li₂CO₃ solution.

Explanation:

Molarity is a measure of the concentration of a substance and is defined as the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

[tex]molarity=\frac{number of moles of solute}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

In this case:

Replacing in the definition of molarity:

[tex]0.250 M=\frac{number of moles of solute}{0.5 L}[/tex]

Solving

0.250 M*0.5 L = number of moles of solute

0.125 = number of moles of solute

If the molar mass of lithium carbonate is equal to 73.9 g/mol, then the required mass of the compound can be calculated by:

[tex]73.9 \frac{g}{mol}*0.125 moles= 9.2375 grams[/tex]

9.2375 grams of lithium carbonate is required to prepare 500.0 mL of a 0.250 M Li₂CO₃ solution.

The mass of lithium carbonate required to prepare 500.0 mL of a 0.250 M Li₂CO₃ solution is 9250.0 grams.

The molar mass, also known as the molecular weight, is the mass of one mole of a substance. It is expressed in units of grams per mole (g/mol). The molar mass of a compound is calculated by adding up the atomic masses of all the atoms in its chemical formula.

Given:

Volume = 500.0 mL = 500.0 cm³

Concentration = 0.250 M (moles per liter)

Molar mass of lithium carbonate (Li₂CO₃) = 73.9 g/mol

Use the formula:

Mass = Volume × Concentration × Molar mass

Substitute the values in the above equation:

Mass = 500.0 cm³ × 0.250 mol/L × 73.9 g/mol

= 9250.0 g

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Answer:

the amount of water

in the ocean increases

Answer:

A. The hydrogen ion concentration increases.

Answer:

0.766atm

Explanation:

Boyles law

P1V1=P2V2

1×635=P2×829

P2=635/829

P2=0.766atm

Answer:

22 neutrons

Explanation:

If so please sorry

[tex]\huge\color{yellow}\boxed{Answer:}[/tex]

My answer is C.Its particles slide past one another

[tex]\huge\color{yellow}\boxed{toshiro hitsugaya}[/tex]

When the  6 liters volume of the substance takes up 12 liter container, we conclude that the substace is highly compressible.

Compressibility is the measure of the relative volume change of a solid or a fluid with respect to pressure change.

Gases are the most compressible susbtance because most of the volume of a gas is composed of the large amounts of empty space between the gas particles.

Therefore, when the  6 liters volume of the substance takes up the entire volume of 12 liter container, we can conclude that the substace is highly compressible.

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Answer:

no

Explanation:

Becasue time zones, San Fransico is in the west while New York is in the north New York is 3 hours ahead of California

Answer:

a. CH3COO⁻.

Explanation:

Hello there!

In this case, according to the given ionization reaction of acetic acid:

CH₃COOH + H₂O --> H₃O⁺ + CH₃COO⁻

Whereas we can evidence how the CH₃COOH is the acid whereas H₂O the base, as the former donates H ions to the latter, which accepts them; we can infer that H₃O⁺ is the conjugate acid, resulting from the base and the a. CH3COO⁻ is the conjugate base, resulting from the acid.

Best regards!