Uranium (VIII) Sulfide formula

Use stoichiometry to calculate the following questions 1) Plants utilize light energy in the photosynthesis process to synthesiz

IceJOKER [234]

Answer:

Explanation:

Problem 1:

Plants utilize light energy in the photosynthesis process to synthesize glucose, C₆H₁₂O₆, from CO₂ and H₂O by way of the reaction 6CO₂ +6H₂O → C₆H₁₂O₆ +60₂. How many grams of CO₂ are consumed in the production of 90 g of glucose?

Given parameters:

Mass of glucose = 10g

Unkown:

Mass of CO₂ consumed = ?

Solution:

The reaction equation is given as:

6CO₂ + 6H₂O → C₆H₁₂O₆ +60₂

To solve this problem, the mole concept is a good approach. First work from the known to the unkown. The known is the given parameter which is the mass of glucose.

Using the mass of glucose, estimate its number of moles and compare to that of the unknown carbon dioxide gas.

Then find the mass from the obtained number of moles.

##

Number of moles of C₆H₁₂O₆ = $\frac{mass of C₆H₁₂O₆}{molar mass of C₆H₁₂O₆}$

given that atomic weight of:

C = 12.01g/mol

H = 1.01g/mol

O = 16.00g/mol

Molar mass of C₆H₁₂O₆ = (6 x 12.01) + (12 x 1.01) + (6 x 16) = 180g/mol

Number of moles = $\frac{90}{180}$ = 0.5mol

##

from the reaction equation,

1 mole of glucose is formed from 6 moles of CO₂

0.5 mole of glucose would be formed from (6 x 0.5)mole = 3moles

##

mass of CO₂ = number of moles x molar mass

molar mass of CO₂ = 12 + 2(16) = 44g/mol

mass of CO₂ = 3 x 44 = 132g of CO₂

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Problem 2:

For the reaction of 100.0 g of NaOH with Cl₂, 2NaOH + Cl₂ → NaClO + NaCI +H₂O, give the masses of each of the products.

Given parameters:

Mass of NaOH = 100g

Unknown:

mass of NaClo = ?

mass of NaCl = ?

mass of H₂O = ?

Solution:

Use the same procedure as highlighted in problem 1:

equation of reaction:

2NaOH + Cl₂ → NaClO + NaCI +H₂O

##

Number of moles of NaOH = $\frac{mass of NaOH}{molar mass of NaOH}$

Molar mass of NaOH:

Atomic weight of Na = 23g/mol

Atomic weight of O = 16g/mol

Atomic weight of H = 1g/mol

Molar mass of NaOH = 23 + 16 + 1 = 40g/mol

Number of moles of NaOH = $\frac{100}{40}$ = 2.5mole

##

From the equation;

first product NaClO:

2 moles of NaOH produced 1 mole of NaClO

2.5 moles of NaOH will produce $\frac{2.5}{2}$ mole = 1.25mole of NaClO

mass of NaClO = number of moles x molar mass

molar mass of NaClO = 23 + 35.5 + 16 = 74.5g/mol

mass of NaClO = 1.25 x 74.5 = 93.13g of NaClO

Second product NaCl:

2 moles of NaOH produced 1 mole of NaCl

2.5 mole of NaOH will produce 1.25 mole of NaCl

mass of NaCl = number of moles x molar mass

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

mass of NaCl = 1.25 x 58.5 = 73.13g of NaCl

Third product H₂O:

2 moles of H₂O produced 1 mole of H₂O

2.5 mole of H₂O will produce 1.25 mole of H₂O

mass of H₂O = number of moles x molar mass

molar mass of H₂O = 2(1) + 16 = 18g/mol

mass of H₂O = 1.25 x 18 = 22.5g of H₂O

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Hydrochloric acid (HCl gas dissolved in water) reacts with calcium carbonate in piece of limestone as follows: CaCO₃ + 2HCI → CaCl₂ + CO₂ + H₂0. If 14.6 g of CO₂ are produced in this reaction, what is the total mass of reactants and the total mass of the products?

Given parameters:

Mass of CO₂ = 14.6g

Unkown:

Total mass of products = ?

Total mass of reactants =?

Solution:

Total mass of products = mass of CaCl₂ + mass of CO₂ + mass of H₂O

Total mas of reactants = mass of CaCO₃ + mass of HCl

Using the procedures highlighted in the first problem, solve for the number of moles of the known:

##

Number of moles of CO₂ = $\frac{mass }{molar mass }$

molar mass of CO₂ = 12 + 2(16) = 44g/mol

Number of moles of CO₂ = $\frac{14.6}{44}$ = 0.33mole

##

number of moles of all species:

These species are in a ratio of one to one and the will have the same number of moles as that of the known:

Number of moles of CaCl₂ = 0.33mole

Number of moles of H₂O = 0.33mole

Number of moles of CaCO₃ = 0.33mole

For HCl:

1 mole of CO₂ is produced from 2 moles of HCl

0.33 mole of CO₂ will produce 2 x 0.33moles = 0.66moles of HCl

##

Mass of each species:

Mass = number of moles x molar mass

molar mass of CaCl₂ = 40 + 2(35.5) = 111g/mol

molar mass of H₂O = 2(1 ) + 16 = 18g/mol

molar mass of CaCO₃ = 40 + 12 + 3(16) = 100g/mol

molar mass of HCl = 1 + 35.5 = 36.5g/mol

mass of CaCl₂ = 0.33 x 111 = 36.83g

mass of H₂O = 0.33 x 18 = 5.94g

mass of CaCO₃ = 0.33 x 100 = 33g

mass of HCl = 0.66 x 36.5 = 24.09g

##

Total mass of reactants = 33g + 24.09g = 57.1g

Total mass of products = 36.83g + 14.6g + 5.94g = 57.3g

6 0

3 years ago

Elements can combine to form molecules, like o2 or co2. elements combine to form molecules and these elements are joined togethe

Yuri [45]

Elements can combine to form molecules, like o2 or co2. elements combine to form molecules and these elements are joined together by chemical bonds i.e covalent bond in this molecule so option A is correct
hope this helps

8 0

3 years ago

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13.How many grams of phosphorus (P4) are needed to completely consume 79.2 L of chlorine gas according to the following reaction

BabaBlast [244]

Answer:

73.2g

Explanation:

The reaction expression is given as:

P₄ + 6Cl₂ → 4PCl₃

Given parameters:

Volume of chlorine gas = 79.2L

Unknown:

Mass of Phosphorus needed = ?

Solution:

To solve this problem, let us find the number of moles of the chlorine gas.

Since the condition of the reaction is at STP;

22.4L of gas is contained in 1 mole

79.2L of chlorine gas will contain $\frac{79.2}{22.4}$ = 3.54mole

From the reaction expression;

6 moles of chlorine gas will react with 1 mole of P₄

3.54 mole of chlorine gas will completely react with $\frac{3.54}{6}$ = 0.59mole of P₄

Mass of P₄ = number of moles x molar mass

Molar mass of P₄ = 4 x 31 = 124g/mol

Mass of P₄ = 0.59 x 124 = 73.2g

8 0

3 years ago

Lithosphere: Odd one out . Analyze each part of the rectangle. One of the parts will be different from the others. Shade the par

patriot [66]

The characteristics of the lithosphere found that the frame that is out of sequence is:

last frame: Iron

The lithosphere is the upper part of the Earth, it is composed of two parts: the crust and the upper part of the mantle, up to the ionosphere, an area of material in a plastic state.

The lithosphere is the most important part for since all the life processes on the planet occur in it, the depth of the lithosphere is greater in the continental part about 250 km than in the oceanic part 150 km, this is It is because it is floating above the stratosphere.

Let's analyze each part of the picture

1. Rigid rocks in the upper part of the mantle.

The lithosphere is the coldest part of the plant, which is why the rocks have solidified, forming a rigid layer of rocks that floats on the mantle.

2. Crust.

It is another name given the uppermost part of the lithosphere, it is formed by a solid area,

3. Tectonic plates.

The lower part of the lithosphere is on an area in a very hot platic state, therefore there is a thermal gradient between the convection current of the asthenosphere and the thermal conduction of the lithosphere, these thermal gradients create breaks or divisions in the upper layer that we call plate tectonics

4.) solid crust of the Earth

The lithosphere is by definition the solid part of the Earth, which is why it is also called solid crust, but not rigid.

5) Continents.

They are the highest parts of the lithosphere, they are above the average height of the oceanic that forms the liquid part that fills the lower spaces of the lithosphere, in general it is formed by rocks of granite composition

6) Earthquakes

The plates of the lithosphere can move between it, in some cases these plates are locked (stopped) accumulating energy at some point the rocks that form part and the plates move abruptly this movement is called an earthquake

7) Volcanoes

The lower part of the lithosphere is hotter, in some parts where the upper rock is more fragile, this heat can fragment them, which is why the molten rock called magna has an exit path towards the earth's surface, in general the fragmentation processes and rupture is accompanied by high pressures that make the surface rise in height, these structures are called volcanoes, the vast majority are near the contact zone of the tectonic plates,

8) Iron

This is a chemical element that is one of the constituents of the lithospheres, but it is not an essential part of its structure. Iron, for being a heavy element, is believed to be fundamentally in the Earth's nucleus, in the lithosphere it only forms 4.7% of its structure. This is why this box is out of sequence of the second rectangle

Consequently with the characteristics of the lithosphere found that the frame that is out of sequence is:

last frame: Iron

learn more about lithosphere here:

brainly.com/question/14631600

5 0

3 years ago

Where would the temperature of the ocean's surface water be the lowest?

bazaltina [42]

Answer:

The correct answer is option C, areas with a high salinity

Explanation:

The higher the density of the ocean water, the lower will be the temperature. The highly saline ocean water thus exists in the polar regions than the tropic regions. Due to high density the cold water seeps down and thus it further becomes cooler while a low density ocean water remains at the surface and possess additional heat

3 0

3 years ago

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