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4 years ago

How do you do stoich

1 answer:

4 0

In a chemical reaction, matter can neither be created nor destroyed, so the products that come out of a reaction must equal the reactants that go into a reaction. Stoichiometry is the measure of the elements within a reaction.[1] It involves calculations that take into account the masses of reactants and products in a given chemical reaction. Stoichiometry is one half math, one half chemistry, and revolves around the one simple principle above - the principle that matter is never lost or gained during a reaction. The first step in solving any chemistry problem is to balance the equation.

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The equation shows a --the breaking and forming of chemical bonds that leads to a change in the composition of matter. 2. In the

GarryVolchara [31]

Explanation:

when electronegativity difference is from 0.0 to 0.4 then bond formed between the two atoms is non-polar covalent in nature.

When electronegativity difference is greater than 0.4 and less than 1.8 then bond between the two atoms is a polar covalent bond.

When electronegativity difference is 1.8 or greater than the bond formed is ionic in nature.

According to the given fill ups, the reaction equation is as follows.

$C_{6}H_{12}O_{6} + 6O_{2} \rightarrow 6CO_{2} + 6H_{2}O$

This means the new products are formed due to the change in chemical composition of the reactants.

Hence, the equation shows a chemical reaction - the breaking and forming of chemical bonds that leads to a change in the composition of matter.

And, in the given equation $CO_{2}$ is a product.

In the equation, $C_{6}H_{12}O_{6}$ is reactant.

In $O_{2}$ , the type of bond that holds the two oxygen atoms together is a non-polar covalent bond.

In $H_{2}O$ , the type of bond that holds one of the hydrogen atoms to the oxygen atom is a polar covalent bond.

The number of oxygen atoms on the left side of the equation is equal to the number of oxygen atoms on the right side.

7 0

3 years ago

From the values of ΔH and ΔS, predict which of the following reactions would be spontaneous at 28°C: reaction A: ΔH = 10.5 kJ/mo

Ainat [17]

Answer: A:

ΔH = 10.5 kJ/mol, ΔS = 30.0 J/K·mol is non-spontaneous.

ΔH = 1.8 kJ/mol, ΔS = −113 J/K · mol is non-spontaneous.

Reaction A can become spontaneous

Reaction A is spontaneous at 76.85 °C

Explanation:

It's helpful to memorize that if:

-ΔS is greater than 0 and ΔH is less than 0; its spontaneous at all temperatures.

-ΔS is less than 0 and ΔH is greater than 0; its non-spontaneous at all temperature.

-ΔS is greater than 0 and ΔH is greater than 0; its spontaneous at high temperatures and non-spontaneous at low temperatures.

-ΔS is less than 0 and ΔH is less than 0; its spontaneous at low temperatures and non-spontaneous at high temperatures.

This comes from the equation ΔG=ΔH-TΔS

where ΔG is Gibbs free energy, ΔH is enthalpy, T is temperature (in Kelvin), and ΔS is entropy.

Without getting too in depth as to what each of those mean (you could take an entire class on entropy alone), the temperature at which the spontaneity changes is equal to ΔG (Gibbs free energy) at 0.

So take the above equation and set ΔG = 0, and rearrange the equation to solve for T.

ΔG=ΔH-TΔS

0=ΔH-TΔS

add TΔS to the other side

TΔS=ΔH

divide the right side by ΔS to find T (temperature)

T=ΔH/ΔS

Now we can find the temperature that the first reaction would occur at spontaneously.

We need to make sure that we have the same units for ΔH and ΔS, so divide 30 by 1000 to convert J/Kmol into kJ/kmol so that we have kJ for ΔH and ΔS.

30/1000 = 0.03 kJ

Plug in the values for the modified equation T=ΔH/ΔS

10.5 kJ/0.03 kJ = 350 K

The temperature is in Kelvin, so subtract 273.15 to convert it into Celsius

350-273.15 = 76.85 °C

7 0

4 years ago

Read 2 more answers

If you have 74.4 liters Argon what is the mass in grams

Sloan [31]

1 liter is 1000 grams so 74.4*1000=74400 grams

7 0

3 years ago

Which statement describes the motion of the sun?

77julia77 [94]

Answer: Different parts of the sun rotate at different rates.

Explanation:

The statement that best describes the motion of the sun is that different parts of the sun rotate at different rates.

First and foremost, we should note that the rotation of the sun is on its axis and also the sun isn't a solid. Due to this, its motion will be that there'll be rotation of different part of it at different rates. Assuming the sun was solid, then all of its parts will move together.

5 0

3 years ago

A sample of a compound consisting only of copper and sulfur contains 88.39g of the metal and 44.61g of non-metal. How many grams

valkas [14]

(88.39 / (88.39 + 44.61) ) x (5264000) = answer for copper grams

(44.61 / (88.39 + 44.61)) x (5264000) = answer for sulfur grams

Sulfur is a non-metal used to make paper, number 16 on periodic table.

7 0

3 years ago