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2 years ago

Question 9 (Essay Worth 4 points)

Chemistry

1 answer:

V125BC [204]2 years ago

6 0

Changes in the level of atmospheric CO₂ will affect marine organisms such as crustaceans.

Diesel and gasoline engines compliant with CO₂ emission standards not be banned.

<h3>What is the effect of atmospheric CO₂ levels likely to impact marine life?</h3>

Atmospheric CO₂ refers to carbon dioxide present in the atmosphere.

Atmospheric CO₂ is required by marine organisms such as crustaceans to make their shells.

Therefore, changes in the level of atmospheric CO₂ will affect the marine organisms such that depend on it to make its shells such as crabs.

Diesel and gasoline engines are associated with CO₂ emission. However, an increase in CO₂ emission has been implicated in global warming as CO₂ is a known greenhouse gas.

Therefore, diesel and gasoline engines compliant with CO₂ emission standards not be banned.

In conclusion, increase in atmospheric CO₂ levels due to increased emission leads to global warming.

Learn more about CO₂ emission at: brainly.com/question/12484795

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A sample of hydrogen gas has a pressure of 1.50 atm with a volume of 5.00 L, what is the pressure if the volume is expanded to 7

miss Akunina [59]

Answer:

The pressure is 0,97 atm

Explanation:

We apply Boyle Mariotte's Law, where for a certain mass of gas, at constant temperature, the pressure and volume vary inversely proportionally: P1x V1 = P2 x V2 P2= (P1 x V1)/V2

P2 = 1, 50 atm x 5, 00 L /7,74 L

P2= 0, 97 atm

6 0

3 years ago

Define each of the following wave phenomena, and give an example of where each occurs: (a) refraction;

Svetach [21]

Refraction is the phenomenon of change in the speed of light when the light when passes from the medium of one optical density to a medium of another optical density. The light rays also show a bending when passing through the interface of such a medium.

<h3>What causes wave refraction?</h3>

Refraction is the bending of waves due to a change in speed as they travel through different media. Waves may accelerate or decelerate when they go obliquely from one medium to another. The waves will bend more dramatically as their speed changes.

<h3>What characteristics does a wave have?</h3>

The following characteristics of waves:

Refraction is the bending of waves as they move from one medium to another due to a change in their speed.
Waves may speed up or slow down as they transition from one medium to another at an angle.

Learn more about Refraction here:-

brainly.com/question/27954963

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5 0

2 years ago

Positive Deviation from Raoult's Law occurs when the vapour pressure of component is greater than what is expected in Raoult's L

8090 [49]

Answer:

All of the above.

Explanation:

In positive deviation from Raoult's Law occur when the vapour pressure of components is greater than what is expected value in Raoult's law.

When a solution is non ideal then it shows positive or negative deviation.

Let two solutions A and B to form non- ideal solutions.let the vapour pressure of component A is $P_A$ and vapour pressure of component B is $P_B$ .

$P^0_A$ = Vapour pressure of component A in pure form

$P^0_B$ = Vapour pressure of component B in pure form

$x_A$ =Mole fraction of component A

$x_B=$ =Mole fraction of component B

The interaction between A- B is less than the interaction A- A and B-B interaction.Therefore, the escaping tendency of liquid molecules in mixture is greater than the escaping tendency in pure form.Hence, the vapour pressure of a mixture is greater than the initial value of vapour pressure.

$P_A >P^0_A\cdot x_A$ , $P_B>P^0_B\cdot x_B$

Therefore, $P_A+P_B >P^0_A\cdot x_A+P^0_B \cdot x_B$

Therefore, the enthalpy of mixing is greater than zero and change in volume is greater than zero.

Hence, option a,b,c and d are true.

6 0

4 years ago

Ca(OH)2 is added to a large beaker of water. How is the solution different from the original water?

Anuta_ua [19.1K]

When Ca(OH)₂ is added to a beaker of water the solution would turn phenolphthalein pink. Phenolphthalein is a common indicator and is only pink when in basic solutions. By adding calcium hydroxide, you are turning the solution into a basic solution since the concentration of OH⁻ ions is going up and therefore any phenolphthalein in solution would turn pink.
(answers A,C, and D would happen if you added an acid to the water such as HCl)
I hope this helps. Let me know if anything is unclear.

6 0

3 years ago

Read 2 more answers

1.40 m3 is how many mL

Zarrin [17]

$\LARGE{ \boxed{ \rm{ \pink{Solution:}}}}$

We know, 1 m³ of space can hold 1000 l of the substance.

⇛ 1 m³ = 1000 l----(1)

And, 1 l is 1000 times more than 1 ml

⇛ 1 l = 1000 ml------(2)

So, From (1) and (2),

⇛ 1 m³ = 1000 × 1000 ml

⇛ 1m³ = 1000000 ml

We had to find,

⇛ 1.40 m³ = 1.40 × 1000000 ml

⇛ 1.40 m³ = 140/100 × 1000000 ml

⇛ 1.40 m³ = 1400000 ml

⇛ 1.40 m³ = 14,00,000 ml / 14 × 10⁵ ml / 1.4 × 10⁶ ml

☃️ So, 1.40 m³ = 14 × 10⁵ ml / 1.4 × 10⁶ ml.

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5 0

3 years ago

Read 2 more answers