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3 years ago

Ron is writing an essay on the process of photosynthesis.On which of the points should he elaborate

Chemistry

2 answers:

Alika [10]3 years ago

8 0

Answer:

Write down the phases and what happens during each phase.

Explanation:

Vinil7 [7]3 years ago

5 0

Answer:

The most important point that your essay on the subject of photosynthesis should address is the following: the importance of photosynthesis in life, both for the environment and for all organisms on the planet

Explanation:

The most important source of energy for life on Earth is sunlight. This energy is harnessed in many ways, the most important actor being the autotrophic plants, which use this energy through the process known as photosynthesis. This is a primary process for all living beings, since all living beings require oxygen to live and this oxygen is achieved by this process. If carbon dioxide is increased, photosynthesis increases directly to achieve the balance of this gas with oxygen. This is why there are environmental factors that determine the performance of photosynthesis.

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Suppose that in an equilibrium mixture of HCl, Cl2, and H2, the concentration of H2 is 1.0 x 10-11 mol-L-1and that of Cl2 is 2.0

bekas [8.4K]

Considering the definition of Kc, the equilibrium molar concentration of HCl at 500 K is 0.0894 $\frac{mol}{L}$ .

The balanced reaction is:

H₂(g) +Cl₂(g) ⇆ 2 HCl(g)

Equilibrium is a state of a reactant system in which no changes are observed as time passes, despite the fact that the substances present continue to react with each other. In other words, reactants become products and products become reactants and they do so at the same rate.

In other words, chemical equilibrium is established when there are two opposite reactions that take place simultaneously at the same speed.

The concentration of reactants and products at equilibrium is related by the equilibrium constant Kc. Its value in a chemical reaction depends on the temperature and the expression of a generic reaction aA + bB ⇄ cC is

$K_{c} =\frac{[C]^{c} x[D]^{d} }{[A]^{a} x[B]^{b} }$

That is, the constant Kc is equal to the multiplication of the concentrations of the products raised to their stoichiometric coefficients by the multiplication of the concentrations of the reactants also raised to their stoichiometric coefficients.

In this case, the constant Kc can be expressed as:

$K_{c} =\frac{[HCl]^{2} }{[H_{2} ]x[Cl_{2} ] }$

You know that in an equilibrium mixture of HCl, Cl₂, and H₂:

the concentration of H₂ is 1.0×10⁻¹¹ $\frac{mol}{L}$
the concentration of Cl₂ is 2.0×10⁻¹⁰ $\frac{mol}{L}$
Kc=4×10¹⁸

Replacing in the expression for Kc:

$4x10^{18} =\frac{[HCl]^{2} }{[1x10^{-11} ]x[2x10^{-10} ] }$

Solving:

$4x10^{18} =\frac{[HCl]^{2} }{2x10^{-21} }$

$4x10^{18} x 2x10^{-21}=[HCl]^{2}$

$8x10^{-3} =[HCl]^{2}$

$\sqrt[2]{8x10^{-3}} =[HCl]$

0.0894 $\frac{mol}{L}$ = [HCl]

Finally, the equilibrium molar concentration of HCl at 500 K is 0.0894 $\frac{mol}{L}$ .

Learn more:

3 0

2 years ago

Research is being carried out on cellulose as a source of chemicals for the production of fibers, coatings, and plastics. Cellul

Luden [163]

Answer:

+ 636 KJ

Explanation:

We want to arrive to the equation

C6H12O6(s) ---------> 6 H2CO(g) ΔH ° rxn = ?

by manipulating algebraically the first four given equations.

We notice the first one has our product H2CO(g) as a reactant. This indicates we must take the inverse of that equation. Also we need 6 mol of H2CO(g), thus it also needs to be multiplied by 6

6 CO2(g) + 6 H2O(g) ------->6H2CO(g) + 6O2(g) ΔH °comb = + 572.9 KJ/x 6

Now we want C6H12O6(s) as a reactant and it is a product in the second one, therefore lets reverse it

C6H12O6(s) -------> 6 C(s) + 6 H2(g) + 3 O2(g) ΔH ° f = + 1274.4 KJ/mol

Now if take the third equation and multiply it by six we will cancel the C(s) with the above equation

6 C(s) + 6O2(g) ---------> 6 CO2(g) ΔH ° f = - 393.5 KJ/mol x 6

Finally by multiplying the last equation by 6 and adding all the equations we will arrive at our desired one

6 H2(g) + 3 O2(g) -----------> 6H2O(g) ΔH ° f = - 285.8 KJ/mol x 6

then lets add them to get ΔH ° rxn:

6 CO2(g) + 6 H2O(g) ------->6H2CO(g) + 6O2(g) ΔH °comb = + 3437.4 KJ

+ C6H12O6(s) -------> 6 C(s) + 6 H2(g) + 3 O2(g) ΔH ° f = + 1274.4 KJ

+ 6C(s) + 6O2(g) ---------> 6 CO2(g) ΔH ° f = - 2361.0 KJ

+6 H2(g) + 3 O2(g) -----------> 6H2O(g) ΔHº f = - 1714.8 KJ

C6H12O6(s) ---------> 6 H2CO(g)

ΔH ° rxn = 3437.4 + 1274.4 - 2361.0 - 1714.8 = 636 KJ

8 0

3 years ago

A sample of a compound contains 60.0 g C and 5.05 g H. Its molar mass is 78.12 g/mol. What is the compound’s molecular formula?

solong [7]

Answer:

C6H6 is the correct answer

5 0

3 years ago

What are the empirical formula and empirical formula mass for C10H30O10?

AysviL [449]

Answer:

Empirical formula: CH₃O

Empirical formula mass = 31 g/mol

Explanation:

Data Given:

Molecular Formula = C₁₀H₃₀O₁₀

Empirical Formula = ?

Empirical Formula mass =

Solution

Empirical Formula:

Empirical formula is the simplest ration of atoms in the molecule but not all numbers of atoms in a compound.

So,

The ratio of the molecular formula should be divided by whole number to get the simplest ratio of molecule

C₁₀H₃₀O₁₀ Consist of 10 Carbon (C) atoms, 30 Hydrogen (H) atoms, and 10 Oxygen (O) atoms.

Now

Look at the ratio of these three atoms in the compound

C : H : O

10 : 30 : 10

Divide the ratio by two to get simplest ratio

C : H : O

10/10 : 30/10 : 10/10

1 : 3 : 1

So for the empirical formula the simplest ratio of carbon to hydrogen to oxygen is 1:3:1

So the empirical formula will be

Empirical formula of C₁₀H₃₀O₁₀ = CH₃O

Now

To find the empirical formula mass in g/mol

Formula mass:

Formula mass is the total sum of the atomic masses of all the atoms present in a formula unit.

**Note:

if we represent the molar mass of the empirical formula for one mol in grams then it is written as g/mol

So,

As the empirical formula of C₁₀H₃₀O₁₀ is CH₃O

Then Its empirical formula mass will be

CH₃O

Atomic Mass of C = 12

Atomic Mass of H = 3

Atomic Mass of O = 16

Total Molar mass of CH₃O

CH₃O = 12 + 3(1) + 16

CH₃O = 12 + 3 + 16

CH₃O = 31 g/mol

4 0

3 years ago

A genetic mutation that causes abnormal cells to rapidly reproduce and divide often leads to ___________.

kari74 [83]

Answer:

cancer.

Explanation:

cancer is caused by abnormal cell division mechanism

6 0

3 years ago

Read 2 more answers