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faust18 [17]
4 years ago
14

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? a burning fossil fuels cont

ributes to climate change. b burning fossil fuels takes place inside expensive fuel cells. c fossil fuels aren’t widely available, but pure hydrogen is. d fossil fuels are nonrenewable.?
Chemistry
1 answer:
guapka [62]4 years ago
3 0
A.) burning fossil fuels contributes to climate change.
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Recycled r134a refrigerant cannot exceed what levels of contaminants
Contact [7]
Answer is:
1) lubricant - 500 ppm by weight.
2) moisture - 50 ppm by weight.
3) non-condensable gases (air) - 150 ppm by weight.
Standard J2099 specific the maximum levels of contaminants for R134a.
ppm<span> (parts-per-million, </span>10⁻⁶) is <span>value that represents the part of a whole number in units of 1/1000000.</span>
7 0
3 years ago
To improve air quality and obtain a useful product, chemists often remove sulfur from coal and natural gas by treating the conta
Norma-Jean [14]

Answer:

1) Increase

2) Decreases

3) increases

4) Increase

Explanation:

These questions can only be answered by considering the principle which states that, "When a constraint such as a change in concentration, pressure or volume is imposed on a reaction system in equilibrium. The system will readjust itself in order to annul the constraint."  

Now, if more reactants are added, the equilibrium position will shift towards the right, If more products are added, the equilibrium position will shift to the left.

Similarly, the removal of H2S causes the O2 concentration to increase since the equilibrium position now shifts to the left.

Also, addition of O2 causes H2S to be removed as the equilibrium moves to the right.

8 0
3 years ago
David’s mom wants to calculate how much it will cost to drive from Los Angeles, CA, to San Francisco, CA. Gas costs $4. 00 a gal
bixtya [17]

The additional information required to calculate the cost of the drive has been distance between the two cities. Thus, option B is correct.

The distance traveled by the object set the cost per unit has been given by the product of the distance and the cost.

<h3>Detail required for calculation cost</h3>

The given question has known cost of the fuel per gallon.

The mileage of the car has been known.

The distance traveled by the car has not been known. Thus, to calculate the cost of the drive, the distance between the two points has to be known. Thus, option B is correct.

Learn more about distance traveled, here:

brainly.com/question/1214027

3 0
3 years ago
Batteries involve the flow of electricity from one metal to another. What happens to these metals to cause the batteries to, eve
wel
Batteries <span>stop working due to the chemical compound between two poles running out. Also part of metal used for negative pole solved every time battery was used.</span>
4 0
3 years ago
1. What type of circuit is in the diagram?<br> parallel circuit<br> series circuit
devlian [24]

Answer:

A series circuit is defined as the circuit in which a number of resistances are connected one after the other.. In a series circuit, the flow of current follows a single path.

A parallel circuit is defined as the circuit in which a number of resistances are linked across each other in such a way that one terminal of each resistance is connected to form a junction point while the remaining end is also connected to form another point.

You havent added the diagram so i cant tell you the answer, but i added the definition of each circuit, see if that helps!

5 0
3 years ago
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