What molecule is shown below?

Answer:

Complete combustion

Explanation:

To solve such this we must know the concept of combustion reaction. Therefore the products of complete combustion are carbon monoxide, carbon and water.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.

There are so many types of chemical reaction reaction like combustion reaction, acid base reaction, double displacement reaction, combustion reactions. The products of complete combustion are carbon monoxide, carbon and water. Large amount of heat is also released in combustion reaction

Therefore the products of complete combustion are carbon monoxide, carbon and water.

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Answer:

For sp3 hybridized central atoms the only possible molecular geometry is tetrahedral.

...,...................................

A spring tide occurs when there is a new or full moon in the solar system.

This is the type of tide which occurs when the sun, moon and earth are in line and occurs between three to four times per year.

Lunar and solar tides also line up and reinforce each other to produce this type of tide.

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Answer:

The two men can arrange a position such as the center of gravity must be nearer the stronger man and the weaker man must be away from the center of gravity of the wooden pole.

In plain language, the stronger man must be near the center while the weaker man must be away from the center of the wooden pole.

Explanation:

I am sachhyam lama

from nepal

my teacher wrote this answer thats why I wrote the answer

A reaction between colorless substances can produce a colored precipitate by formation of new ionic compound.

An ionic compound is a compound that is made up of two elements, one metal and the other non metal, which are held together by an ionic bonding.

When reaction occurs between two colourless substances, colored precipitate results by formation of new ionic compound.

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The optimum pH of formic acid - formate buffer is 3.75

A substance or a solution which resists any changes in pH, when acid or alkali is added to it.

pH = pKa + log[base] / [acid]

Considering equimolar concentration of acid and base

pH = 3.75 + log(x)/(x)

pH = 3.75 + log (1)

pH = 3.75 + 0

pH = 3.75

Hence,

The optimum pH of formic acid - formate buffer is 3.75

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The metal which will reach the highest temperature is the metal with the lowest specific heat capacity.

The amount of heat Q = mcΔT where

Making ΔT subject of the formula, we have

ΔT = Q/mc

Given that Q and m are the same for each metal,

ΔT ∝ 1/c

We see that the temperature change is inversely proportional to the specific heat capacity.

Since the metals are at the same temperature, the metal which will reach the highest temperature is the metal with the lowest specific heat capacity.

So, the metal which will reach the highest temperature is the metal with the lowest specific heat capacity.

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Answer:

82.606g

Explanation:

[tex]5.15mol CO* \frac{1 mol CO}{1 mol CH4} *\frac{16.04 g CH4}{1 mol CH4} =82.606g CH4[/tex]

When an element is placed into a solution with lesser reaction, the reaction rate will be slow.

The rate of a reaction is the rate which reactants molecules are converted or the products molecules are formed.

The rate of a reaction increases with increase in concentration of the reactants and decreases with decrease in concentration.

Therefore, when an element such as a metal is placed in solution of low concentration such as very dilute acid, the reaction rate will be slow.

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Answer:

19-73 19-73 70-65-46 71-76-63 25-46-79

The enthalpy of the reaction is obtained as 4.876 kJ.

The enthalpy of a reaction is the heat that is absorbed or emitted in a reaction.

Given the reaction; N2(g) + 3H2(g) ⇔2NH3(g);

Number of moles of N2 = 6.44 grams/28 g/mol

= 0.23 moles

If 1 mole of N2 releases 21.2 kJ of energy

0.23 moles of N2 releases 0.23 moles *  21.2 kJ /1 mole

= 4.876 kJ

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C. PH3 represents a compound commonly known as phosphine, whose IUPAC name is phosphorus trihydride.

The electronegativity of PH3 found in the Periodic Table of the Period attracts covalent electron pairs and creates covalent bonds. However, because the electrons are not bound, asymmetrical rate distribution occurs. Therefore, PH3 is a polar molecule with a non-polar covalent bond and currently has no polar bond.

A covalent bond consists of sharing one or more electron pairs between two atoms. These electrons are attracted to two nuclei at the same time. Covalent bonds are formed when the difference in electronegativity between two atoms is too small for electron transfer to form ions.

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Answer:

C.) ph3

Explanation:

Answer:

seven on the ph scale is the neutral point

Explanation:

The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

Answer:

The answer will be false.

Explanation:

because it is not balanced.

Answer:

yellow

Explanation:

The heat required to warm the fuel back to it's operating temperature is 3.83×10⁷ J

The heat required to warm the fuel can be obtained as follow:

Q = MC(T₂ – T₁)

Q = 135 × 1559.45 × (298 – 116)

Q = 135 × 1559.45 × 182

Q = 3.83×10⁷ J

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Before the occurance of Fossil fuel, our energy needs were modest. For heat, we relied on the sun—and burned wood, straw, and dried dung For transportation, the muscle of horses and the power of the wind in our sails took us to every corner of the world.

Fossil fuels are made from decomposing plants and animals.

These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy.

Coal, oil, and natural gas are examples of fossil fuels.

Hence, Before the occurance of Fossil fuel, our energy needs were modest. For heat, we relied on the sun—and burned wood, straw, and dried dung For transportation, the muscle of horses and the power of the wind in our sails took us to every corner of the world.

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Answer:

B is the answer.

Explanation:

sry if wrong :D

Answer:

= 62g

Explanation:

We have been asked to find the mass of Na2O having 6.02 x 10^23 units.

We know that one mole of a substance contains 6.02 x10^23 units/particles.

That means we have one mole of Na2O.

To find the mass of Na2O we use the formula,

mass = number of moles x formula mass

= 1 mole x 62g/mol

= 62g

Therefore the mass of Na2O with 6.02 x 10^23 units is 62g.

The required energy will be "87752 J".

The definition of energy is "ability to do work," which is the capacity to apply a force that causes an item to move.

Mechanical, heat, chemical, electrical, radiant, nuclear, and sound are the seven types of energy.

The energy will be:

Q1 = 36 × 3.18(100-65)

Q1 = 5267 J

Moles of water = [tex]\frac{36.0}{18}[/tex]

Moles of water = 2

then,

Q2 = 2× 40.7

Q2 = 81.4 KJ

Q2 = 81400 J

Q3 = 36.0 × 2.01(115-100)

Q3 = 1085 J

hence,

Required energy will be= Q1+ Q2+ Q3

Required energy = 5267 + 81400 + 1085

Required energy = 87752 J

hence, 87752 J energy is required to heat 36. 0 g h2o from a liquid at 65°c to gas at 115°c.

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Answer:

homozygote

Explanation:

Because tongue-rolling is recessive, the only way a person would be unable to roll his/her tongue would be if s/he were homozygous mutant.

Answer:

H + 02 = H2O

Explanation:

The equation is not a transmutation because there is conservation of the number of atoms as well as the number of nucleons; option C.

Transmutation refers to the artificial synthesis of new elements by a nuclear reaction of the original element and nuclear particles.

In transmutation, a new element is formed and the atomic number changes.

Based on the above, it can be concluded that the given equation is not a transmutation because there is no change in atomic and nucleon number.

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Answer:

1.42 M

Explanation:

First calculate the amount of moles.

that's done by dividing the mass with the molecular mass so 660g / 310.18 g/mol = 2.13 mol

Then you can calculate the molarity by dividing the moles with the volume so 2.13 mol / 1.5 l = 1.42 M

(without rounding: 1.418531175 M)

Answer:

1.42 M

Explanation:

Acellus

Answer:

measure their densities

Investing   :

"I'm considering investing in equities."

"I need a system for handling my finances."

"I need to put money away for the future."

No Investment :

"My knowledge of investment is limited."

"I am unable to purchase stocks."

"I don't particularly enjoy taking chances."

Explanation:

These are accurate because I recently completed the course that taught me these things.

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The volume is 2.608L

Given the value of n is 0.825 mole , pressure is 600mm = 0.789bar and Temperature = 300K

We need to calculate the volume in L

As we know the values of number of moles , pressure and Temperature is given

So , to calculate the volume we will use the ideal gas law

The equation of state for a fictitious perfect gas is known as the ideal gas law, sometimes known as the generic gas equation. Although it has several restrictions, it is a decent approximation of the behavior of numerous gases under various circumstances.

Ideal gas law formula

PV = nRT

0.789*V = 0.825*8.3143*300

V = 0.825*8.314*300/0.789

V = 2.608*10^3

V = 2.608 L

Hence the Volume is 2.608 L

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Considering the Charles's law, the sample of carbon dioxide gas will occupy 308.72 mL.

Charles's law establishes the relationship between the temperature and the volume of a gas when the pressure is constant. This law says that the volume is directly proportional to the temperature of the gas: for a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases.

Mathematically, Charles's law states that the ratio between volume and temperature will always have the same value:

[tex]\frac{V}{T} =k[/tex]

Considering an initial state 1 and a final state 2, it is fulfilled:

[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]

In this case, you know:

Replacing in Charles's law:

[tex]\frac{250 mL}{298 K} =\frac{V2}{368 K}[/tex]

Solving:

[tex]V2=368 K\frac{250 mL}{298 K}[/tex]

V2= 308.72 mL

Finally, the sample of carbon dioxide gas will occupy 308.72 mL.

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Answer:

310mL

Explanation:

A sample of carbon dioxide gas occupies a volume of 250 mL at 25°C. What volume will it occupy at 95°C?

Use the formula:

V1

T1

=

V2

T2

Temperature conversion: __°C + 273 K

Answer:

the answer will be false.

Explanation:

because it is not balanced.