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3 years ago

Calculate the volume of this irregular solid to the nearest cubic centimeter

Chemistry

2 answers:

EleoNora [17]3 years ago

6 0

Answer:

8 cm3

Explanation:

The volume of this irregular solid will calculated as the difference between the final volume and the initial volume;

The final volume of the water and the solid is 25 ml

The initial volume of the water alone was 17 ml

The volume of the irregular solid is thus approximately;

25 - 17 = 8 ml

We then use the conversion;

1 cm3 = 1 mL

Thus the volume of the solid is 8 cm3

oee [108]3 years ago

3 0

Answer:

Explanation:

took the assignment

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Which will most likely result if the levels of dissolved oxygen decrease in a body of water?

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B) Native fish species will begin to decrease in population size.

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The table shows the percentages of hydrocarbons that are found in a sample of crude oil. Hydrocarbons Percentage Paraffins 30 Na

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This will be classified as light on the API scale due to the large percentage of lighter fractions such as paraffins and naphthenes.

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4 years ago

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Combustion of hydrocarbons such as dodecane (C12H26) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earth'

miss Akunina [59]

Answer:

A. 2C12H26(l) + 37O2(g) —> 24CO2(g) + 26H2O(g)

B. 761.42 L

Explanation:

A. Step 1:

The equation for the reaction.

C12H26(l) + O2(g) —> CO2(g) + H2O(g)

A. Step 2:

Balancing the equation.

The equation can be balance as follow:

C12H26(l) + O2(g) —> CO2(g) + H2O(g)

There are 12 atoms of C on the left side and 1 atom on the right side. It can be balance by putting 12 in front of CO2 as illustrated below:

C12H26(l) + O2(g) —> 12CO2(g) + H2O(g)

There are 26 atoms of H on the left side and 2 atoms on the right side. It can be balance by putting 13 in front of H2O as illustrated below:

C12H26(l) + O2(g) —> 12CO2(g) + 13H2O(g)

Now, there are a total of 37 atoms of O2 on the right side and 2 atoms on the left. It can be balance by putting 37/2 in front of O2 as illustrated below:

C12H26(l) + 37/2O2(g) —> 12CO2(g) + 13H2O(g)

Multiply through by 2 to clear the fraction from the equation.

2C12H26(l) + 37O2(g) —> 24CO2(g) + 26H2O(g)

Now the equation is balanced

B. Step 1:

We'll by obtaining the number of mole of C12H26 in 0.450 kg of C12H26. This is illustrated below:

Molar Mass of C12H26 = (12x12) + (26x1) = 144 + 26 = 170g/mol

Mass of C12H26 = 0.450 kg = 0.450x1000 = 450g

Number of mole of C12H26 =?

Number of mole = Mass/Molar Mass

Number of mole of C12H26 = 450/170

Number of mole of C12H26 = 2.65 moles

B. Step 2:

Determination of the number of mole of CO2 produced by the reaction. This is illustrated below:

2C12H26(l) + 37O2(g) —> 24CO2(g) + 26H2O(g)

From the balanced equation above,

2 moles of C12H26 produced 24 moles of CO2.

Therefore, 2.65 moles of C12H26 will produce = (2.65x24)/2 = 31.8 moles of CO2.

B. Step 3:

Determination of the volume of CO2 produced by the reaction.

Pressure (P) = 1 atm

Temperature (T) = 19°C = 19°C + 273 = 292K

Gas constant (R) = 0.082atm.L/Kmol

Number of mole (n) = 31.8 moles

Volume (V) =?

The volume of CO2 produced by the reaction can b obtained by applying the ideal gas equation as follow:

PV = nRT

1 x V = 31.8 x 0.082 x 292

V = 761.42 L

Therefore, the volume of CO2 produced is 761.42 L

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Sunny_sXe [5.5K]

<h2>Question no 1:</h2><h2>Answer:</h2>

The correct answer is option A which is Sarah is correct because genetic diversity occurs over a long period of time.

<h3>Explanation:</h3>

Genetic diversity is a large number of allelic combinations for a trait in specie in a population.
Genetic diversity is caused due to mutations or random breeding in a specie.
It is good for the adaptation of specie in an environment, due to diverse in genotypes and phenotype of a trait.

<h2>Question number 2:</h2><h2>Answer:</h2>

The correct answer is option B which is the species will adapt to the changes.

<h3>Explanation:</h3>

Adaptation to an environment means changing your body in such a way to reduce the harmful affects of changing the environment on the body.
For example, the long and thick fur of sheeps in a snowy area will protect them from cold.
If the environment changes, the first thing a specie do is an adaptation to that change in the environment.

<h2>Question 3.</h2><h2>Answer:</h2>

The correct answer is option D which is, "The spines of a cactus protect it from animals".

<h3>Explanation:</h3>

Adaptation to an environment means changing your body in such a way to reduce the harmful affects of changing the environment on the body.
For example, the long and thick fur of sheeps in a snowy area will protect them from cold.
So the plant of cactus was in danger due to animals. So the start growing spines in response to animals.
Hence the correct answer is option D.

<h2>Question 4.</h2><h2>Answer:</h2>

The correct answer is option B which is, "Marie's plant will lean toward the sun so that it can get the most sunlight".

<h3>Explanation:</h3>

The plant will lean towards the sun light by the mechanism of phototropism.
Phototropism is the mechanism of growth of the plant in a specific direction in the response of light.
There are two types of phototropism.
One is a positive phototropism in which plant grows towards the light.
The other is negative phototropism in which plant grows away from the light.
In this question,the plant will do positive tropism.

<h2>Question no. 5</h2><h2>Answer:</h2>

The correct answer is option B which is, "The dodo bird could not adapt quickly to the challenges of the environment".

<h3>Explanation:</h3>

Adaptation to an environment means changing your body in such a way to reduce the harmful affects of changing the environment on the body.
For example, the long and thick fur of sheeps in a snowy area will protect them from cold.
So the dodo could not adopt to the environment. For the positive adaption of survival, they should be afraid of sailors but the would not afraid of a sailor.
Due to which they went extinct.

Remaining questions are in attached document.

Download pdf

7 0

3 years ago

Calculate the volume of this irregular solid to the nearest cubic centimeter​

Calculate the volume of this irregular solid to the nearest cubic centimeter