How many grams of water will be produced when 14.9 L of H2 reacts according to the following equation?
H2 + O2 H2O

The correct option is option 5 that is 1s²2s²2p³.

Acc to the general electronic configuration of carbon is 1s²2s²2p².

generally the carbon contains the six electrons but with ionic charge of 1 , the carbon contains seven electrons and these electrons are filled in the orbitals acc to the Hund's rule.

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The correct Option is 5 that is 1s²2s²2p³

The atomic number of carbon is six it means the carbon has six electrons and six protons in its valence shell.

Acc to that the general electronic configuration of carbon is 1s²2s²2p ².

since the carbon has four electron in its last shell so it can share their electron with other atom to formed the compound to complete  its octet and become the neutral compound.

The orbitals present in the subshell and to fill the orbitals with electron we follow HUND's RULE.

acc to HUND's rule , every orbital are filled first filled with one electron then filled with second electron so as to make doubly occupied the orbital.

There are fours types of orbitals S,P,D,F.

In the S orbital has capacity to filled only two electrons , 2 S orbital filled 2 electrons The P orbitals has capacity to filled 6 electrons divided into 2px , 2py, 2pz (Each contain two electrons).

Since as per the question one ionic charge are added so the total number of electrons in the carbon is 7 acc to that the electrons are distributed in the orbitals.

1S² = 2 electrons

2S²= 2 electrons

2px = 1 electron

2py= 1 electron

2pz = 1 electron

Generally the carbon contain 6 electron but with ionic charge the total number of electron becomes 7 and the filling of orbital follow the Hund's rule.

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The molarity of the final solution  by dissolving 516.5 mg of oxalic acid to make 100.0 ml of a solution is 002295M.

Molarity of a given result is defined as the total number of intelligencers of solute per litre of result. The molality of a result is dependent on the changes in physical parcels of the system similar as pressure and temperature as unlike mass, the volume of the system changes with the change in physical conditions of the system.

516.5 mg of oxalic acid

516.5 mg = 0.5165 g

Number of moles,

=  0.5165 g *(1mole)/(90g)

= 0.0057388

Molarity for the solution,

= 0.0057388moles/.1liters

= 0.05738 M

The molarity of the final solution,

= (0.057388 moles/liter)*(10ml/250ml)

= 0.002295 M

Therefore, The molarity of the final solution  by dissolving 516.5 mg of oxalic acid to make 100.0 ml of a solution is 002295M.

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The concentration of the HCl solution needed to neutralize 25 mL of 0.2 M NaOH is 0.25 M

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

CaVa / CbVb = nA / nB

(Ca × 20) / (0.2 × 25) = 1

(Ca × 20) / 5  = 1

Cross multiply

Ca × 20  = 5

Divide both side by 20

Ca = 5 / 20

Ca = 0.25 M

Thus, the concentration of the HCl solution is 0. 25 M

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Answer:

Explanation:

Titration: titrate twice, the first time with an indicator to determine how much sodium hydroxide is needed to completely react with hydrochloric acid, and the second time without an indicator to prevent the contamination of the sodium chloride salt produced

Answer:

The molecular weight of C5H12 is 72.15 g/mol, and the molecular weight of CO₂ is 44.01 g/mol.

To calculate the amount of CO₂ produced when 2500.0g of C5H12 are burned, we first need to calculate the number of moles of C5H12:

2500.0g / 72.15 g/mol = 34.64 mol C5H12

According to the balanced equation, 5 moles of CO₂ are produced for every 1 mole of C5H12 burned, so we can calculate the number of moles of CO₂ produced:

34.64 mol C5H12 × 5 mol CO₂ / 1 mol C5H12 = 173.2 mol CO₂

Finally, we can convert the number of moles of CO₂ produced to liters using the ideal gas law:

PV = nRT

Assuming standard temperature and pressure (STP), which is 0°C and 1 atm, we can simplify the equation to:

V = n × 22.4 L/mol

V = 173.2 mol × 22.4 L/mol = 3876.7 L

Therefore, if a car burns 2500.0g of gasoline, it releases approximately 3876.7 L of carbon dioxide.

The term mole concept is used here to determine the moles of copper. It is the convenient method for expressing the amount of the substance. The number of moles of copper in 564 grams is  8.87 moles.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

Molar mass of copper = 63.55 g / mol

Number of moles = 564 / 63.55 = 8.87 moles

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The reaction between hydrochloric acid (HCl) and potassium hydroxide (KOH) generates heat. By measuring the temperature change of the reaction, the enthalpy change of the reaction can be determined. To calculate the enthalpy change of this reaction, the amount of heat released by the reaction needs to be measured.

The amount of heat that the reaction generates is proportional to the amount of substance that is consumed and the temperature change that occurs as a result of the reaction. Thus, the enthalpy change of a reaction can be calculated by measuring the heat released and the number of moles of reactant consumed. In this case, you carefully measure 50.0 mL of 1.00 M HCl and 55.0 mL of 1.00 M KOH.

This represents the amount of heat released by the reaction. The enthalpy change of the reaction can be calculated as follows:ΔH = -q/n

ΔH = -6364 J / (0.0500 moles)

ΔH = -127280 J/mole

Therefore, the enthalpy change per mole of reactant is -127280 J/mol.

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LiCl

because Li loses 1 electron ==> Li+

and Cl gains 1 electron ==> Cl-

Li+ Cl-

we use the criss cross rule

===> LiCl

When 1.00 L of a 0.500 M LiBr solution is tripled by dilution with water . the number of moles of  lithium in new solution is 0.5 moles.

given that :

volume = 1.00 L

molarity = 0.500 M

The solution is tripled by dilution but there will be no effect in number of mole by the dilution.

the number of moles = molarity × volume in L

the number of moles = 1 × 0.500

the number of moles = 0.5 mol

Thus, When 1.00 L of a 0.500 M LiBr solution is tripled by dilution with water . the number of moles of  lithium in new solution is 0.5 moles.

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Answer:

air, water, sunlight

Explanation:

A limiting factor may be defined as a environmental condition or a resource that can limit the plant growth as well as distribution or the abundance of an organism or its population within the ecosystem. The ability  of any plant species to grow and spread throughout any geographic area is the direct result of the adaption to its biotic  and abiotic components of that region.

Some of the factor that affect the plant growth are : sunlight, air, proper temperature, moisture, nutrients, wind,etc.

The lack of the any one of the above essential component will determine the health of the  plant.

Answer:

Carbonic acid

Best of luck

The diameter of a liquid droplet suspended in zinc vapor such that the vapor pressure has doubled, we need the specific values for surface tension (σ) and molar volume (V) of the liquid. Unfortunately, these values are not provided in the question.

To calculate the diameter of a liquid droplet suspended in zinc vapor such that the vapor pressure has doubled, we need to use the relationship between the vapor pressure and the diameter of the droplet. The equation that relates these two quantities is known as the Kelvin equation:

ΔP = (2σV) / r

where ΔP is the change in vapor pressure, σ is the surface tension of the liquid, V is the molar volume of the liquid, and r is the radius of the droplet.

In this case, the vapor pressure has doubled, so we have:

ΔP = 2P

where P is the initial vapor pressure.

Rearranging the Kelvin equation, we can solve for the radius:

r = (2σV) / ΔP

Now, let's plug in the given values:

Initial vapor pressure, P = 150 (units not specified)
Surface tension, σ = (depends on the liquid used)
Molar volume, V = (depends on the liquid used)
Change in vapor pressure, ΔP = 2P

Since the values for surface tension and molar volume are not given, we cannot calculate the exact diameter of the droplet. These values depend on the specific liquid being used.

To obtain the diameter, we would need to know the specific values for σ and V, which are properties of the liquid. Once we have those values, we can substitute them into the equation and solve for the radius. Then, we can double the radius to get the diameter of the droplet.

In summary, to calculate the diameter of a liquid droplet suspended in zinc vapor such that the vapor pressure has doubled, we need the specific values for surface tension (σ) and molar volume (V) of the liquid. Unfortunately, these values are not provided in the question.

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Answer:

i think it's oxygen

Explanation:

the smart kid in my class said so lol

The statement that is false regarding the chemical grooming of pyruvate is "each pyruvate molecule has a CO2 added and then joins with an NADH.

Pyruvate is the end product of glycolysis that further undergoes chemical grooming in the presence of oxygen to produce ATP. The complete oxidation of glucose produces a total of 36-38 ATPs per molecule.

Pyruvate is oxidized to produce Acetyl-CoA. During this process, the carboxyl group of pyruvate is removed and given off as CO2. This is known as decarboxylation.

The remaining 2-carbon molecule is then oxidized by the removal of electrons by the NAD+ which is reduced to NADH. This is called oxidative decarboxylation, and its purpose is to prepare the substrate for energy production.

The correct statement regarding the chemical grooming of pyruvate is, "Each pyruvate molecule loses a CO2 molecule and then joins with a coenzyme A to form acetyl-CoA, producing an NADH molecule."

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Looking at the solubility curve above for KClO3, at 30 degrees Celsius 37grams will dissolve to make a saturated solution.

Saturated and unsaturated solutions: what are they?

A saturated solution is one that has as much of the solute present as is capable of dissolving. A solution is said to be unsaturated if it doesn't contain all of the solute that can disperse in it.

A depiction of solubility (measured in g/100 g water) versus temperature (measured in °C) is known as a solubility curve. On the same graph, solubility curves for various substances are frequently depicted, allowing for easy comparisons. The curved line on the graph that depicts the connection between temperature and a substance's solubility at various temperatures is known as the solubility curve.

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Answer:where did you get this

Explanation:

When, where, and how much a gene is expressed in a cell depends on the histones and epigenetic elements working together.

In eukaryotic cells, there are proteins called histones that serve two purposes. They support the maintenance of DNA in a compact state and control the loosening the tightening of DNA strands, which controls the expression of genes.

Epigenetic factors are substances that alter the gene to control how a gene expresses itself. Both of these modifications are not heritable and do not result in mutations. These are transient alterations such DNA remodeling, methylation, and alkylation, among others.

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If a researcher wanted to the temporarily denature a protein but wanted to be sure it would refold, the method or the substances would be most appropriate is the urea.

The denature is defined as the process of the modification of the molecular structure of the protein. In this method it involves the breaking of the many weak linkage or the bonds in the protein molecules. It is responsible for highly ordered of the structure of the protein in the natural of state.

Thus, the urea is the appropriate substances , if the researcher wanted to the  temporary denature the proteins.

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Answer:

I belive C: essential amino acids

Explanation:

They can t be made from the body so they must be obtained my food

c. No, it is not enthalpy favored since the chemical system gains energy.

If the temperature of the water lowers while ammonium nitrate dissolves in it, the process is endothermic and heat is absorbed by the system.

Through the process of dissociation into its individual ions, ammonium nitrate readily dissolves in water. Because it was created from a strong acid (HF) and a weak base (NH3), this salt has an acidic character (HNO3). This reaction is extremely exothermic and it happens quickly.

A spontaneous reaction favors one that favors the creation of products in the environment in which it is taking place. A campfire that is roaring is an exothermic example of a spontaneous reaction. 

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Answer:

Lungs.

Explanation:

They bring the blood throughout the body, to help it function properly

Answer:

243L of SO2

Explanation:

You'll want to use the Ideal Gas Law for this problem.

First, determine your formula. V=nRT/P

Next, determine your factors.

V = ?

n = 847g

R = 0.0821L.atm/mol.k

T = 313k (40+273)

P = 89.4kPa

Now just plug it in!

847g x 313k / 89.4kPa  x  0.0821L.atm / mol. K

243L of SO2. Hope this helps!

The angle between vectors A and B is approximately 0.5328 radians or about 30.49°.

A=(1,3,2) and B=(2,5,1)

Formula used: \($$\cos\theta=\frac{\mathbf{A}\cdot\mathbf{B}}{|\mathbf{A}|\cdot|\mathbf{B}|}$$\)

The angle between vectors A and B is given by \($\cos^{-1}\theta$\)

First, let us calculate the dot product of vectors A and B: \($\mathbf{A}\cdot\mathbf{B}=1\cdot2+3\cdot5+2\cdot1=2+15+2=19$\)

Now, we need to calculate the magnitude of vectors A and B :

\($|\mathbf{A}|=\sqrt{1^2+3^2+2^2}=\sqrt{1+9+4}=\sqrt{14}$$|\mathbf{B}|=\sqrt{2^2+5^2+1^2}=\sqrt{4+25+1}=\sqrt{30}$\)

Substituting these values in the formula to calculate \($\cos\theta$\), we have \($$\cos\theta=\frac{\mathbf{A}\cdot\mathbf{B}}{|\mathbf{A}|\cdot|\mathbf{B}|}=\frac{19}{\sqrt{14}\sqrt{30}}\approx0.851$$\)

Therefore,\($$\theta=\cos^{-1}(0.851)\approx0.5328$$\)

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Answer:

balanced equation: CH₄ + 2O₂ → CO₂ + 2H₂O

Explanation:

Given sample: CH₄ + O₂ → CO₂ + H₂O

changes applied: CH₄ + 2O₂ → CO₂ + 2H₂O

The mass of AgBr produced from 22.5 L of AgNO₃ is 50.01 gram

Mass is a measure of the amount of matter in a substance or an object.

Here given reaction is stoichiometric

From the balanced equation for the reaction si

2AgNO₃ + MgBr₂ → 2AgBr + Mg(NO₃)₂

The mole ratio of AgNO₃ and AgBr is 2 : 1

Mole of 22.5 g AgNO₃ = 22.5/169.87

Mole of 22.5 g AgNO₃ = 0.1325 mole

Equivalent mole of AgBr = 0.265 mole

Mass of 0.265 mole AgBr = 0.265×188.77

Mass of 0.265 mole AgBr = 50.01 gram

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The approximate partial pressure of oxygen at 1500 m is 0.18 atm.

From barometric pressure table;

1500 m = 85 kPa

1 kPa = 0.0099 atm

85 kPa = ?

= 0.84 atm

Oxygen percentage in air  = 21%

P = 0.21 x P(total)

P = 0.21 x 0.84 atm

P = 0.18 atm

Thus, the approximate partial pressure of oxygen at 1500 m is 0.18 atm.

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