Im sooooooooooooooooooooooooo cufused on science

What are the benefits and drawbacks of using algae as a fuel source?

I am Lyosha [343]

Answer:The Benefit is that it is a good natural fuel for nature and it will not hurt the environment

Explanation:

The drawback is that it will not last long and I don’t know which fuel you mean either for tools and cars,etc or for food but for cars,etc like o said it will not last long and for food it can be poison to the human body

8 0

3 years ago

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Consider the following intermediate reactions.

Alja [10]

2.1648 kg of CH4 will generate 119341 KJ of energy.

Explanation:

Write down the values given in the question

CH4(g) +2 O2 → CO2(g) +2 H20 (g)

ΔH1 = - 802 kJ

2 H2O(g)→2 H2O(I)

ΔH2= -88 kJ

The overall chemical reaction is

CH4 (g)+2 O2(g)→CO2(g)+2 H2O (I) ΔH2= -890 kJ

CH4 +2 O2 → CO2 +2 H20

(1mol)+(2mol)→(1mol+2mol)

Methane (CH4) = 16 gm/mol

oxygen (O2) =32 gm/mol

Here 1 mol CH4 ang 2mol of O2 gives 1mol of CO2 and 2 mol of 2 H2O

which generate 882 KJ /mol

Therefore to produce 119341 KJ of energy

119341/882 = 135.3 mol

to produce 119341 KJ of energy, 135.3 mol of CH4 and 270.6 mol of O2 will require

=135.3 *16

=2164.8 gm

=2.1648 kg of CH4

2.1648 kg of CH4 will generate 119341 KJ of energy

4 0

3 years ago

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The molecules of a substance must have what characteristics in order to be flexible

Goryan [66]

Answer:
The molecules of a substance which must have the ability to move past one another are said to be flexible.

Explanation:
Those substances are said to be flexible which can be bent without breaking. There are many substances which are hard in nature but still can be bent. The hardness of such materials is due to strong interactions between the molecules and the flexibility comes due to their amorphous backbone. Therefore, greater the crystalline level of macromolecules lesser is the flexibility and greater the amorphous character greater is the flexibility and vice versa. Also, the flexibility of polymers is increased by adding plastisizers in it. Plastisizers make the hard polymers flexible by breaking the crosslinkers and enabling the macromolecules to move past one another.

6 0

3 years ago

Think of an everyday activity where removal of one of the products helps the reaction to faster in forward direction?

elena55 [62]

Answer:

Cooking with open, exposed flame to prevent build up of CO₂ which will extinguish the fire

Explanation:

In the cooking process whereby food is heated by the combustion of cooking gas as follows;

C₄H₁₀ (g) + (13/2)O₂ → 4CO₂(g) + 5H₂O(g), ΔH = -2658 kJ·mol⁻¹

The product of the combustion must be allowed to escape freely to allow for more reactant molecules of oxygen and butane to effectively combine.

Whereby, the CO₂ is allowed to remain and accumulate at the reaction site, the CO₂ displaces the oxygen and reduces the butane such that as the CO₂ builds up without removal, the CO₂ and butane will left in the mixture while the fire is extinguished.

4 0

3 years ago

In the balanced equation, 4KO2 + 2CO2 = 2K2CO3 + 3O2 which two chemicals have a molar ratio of 3:4?

Sveta_85 [38]

4KO₂ + 2CO₂ → 2K₂CO₃ + 3 O₂

The two chemicals that have a molar ratio of 3:4 is in equation above O₂ and KO₂

explanation

The molar ratio is the ratio between the amount in moles of two compounds that are involved in a chemical reaction.

In the equation above the mole ratio is determined by examining coefficient ( number in front of the formula)

the coefficient of O₂ is 3 while that of KO₂ is 4 therefore the mole ratio of O₂:KO₂ is 3:4

3 0

3 years ago

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