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3 years ago

Scientists have discovered how to use electricity to power cars. Running cars on electricity could help

2 answers:

8 0

Running cars on electricity would conserve gasoline because electric cars do not use the same resources.

Hope this helps!

EleoNora [17]3 years ago

7 0

Answer: A) conserve gasoline.

Fueling the cars with electricity offers some benefits over conventional fueling cars, these vehicles react quickly, these can be charged easily and efficiency of the vehicle increases. Most importantly this initiative can help in the conservation of the fuels like coal, natural gas and gasoline which are non-renewable sources of energy. All these energy resources utilized by the cars or any other transportation vehicle releases toxic chemical gases which are responsible for pollution. The running cars on electricity is likely to produce less pollution than conventionally fueled cars.

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1. Calculate the number of moles of carbon dioxide formed when 40.0 moles of oxygen is consumed in the burning of propane. Note

Andrews [41]

Answer:

1. D (24.0 moles CO2)

2. A (.239 moles H2)

Explanation:

1. First Balance the equation

1 C3H8 + 5 O2 ---> 3 CO2 + 4 H2O

Then set up a stoiciometric equation so that the moles of O2 cancel out

40mol O2 x $\frac{3 mole CO2}{5 mole O2}$ = 24.0 moles CO2

2. Set up a stoichiometric equation

10 grams Fe x $\frac{1 mole Fe}{55.85 grams Fe}$ x $\frac{4 mole H2}{3 mole Fe}$ = 0.239 moles H2

6 0

3 years ago

If the NaOH is added to 35.0 mL of 0.167 M Cu(NO3)2 and the precipitate isolated by filtration, what is the theoretical yield of

Ghella [55]

Answer:

The correct answer is - 0.570 grams

Explanation:

The balanced chemical reaction is given by

Cu(NO3)2(aq) + 2NaOH(aq) --------> Cu(OH)2(s) + 2NaNO3(aq)

1.0 mole 2.0 mole 1.0 mole 2.0 mole

number of mol of Cu(OH)2,

n = Molarity * Volume

= $35.0*0.167 = 5.845$ millimoles

As clear in the equation, 1 mole of Cu(NO3)2 gives 1 mole of Cu(OH)2 , So, 5.845 millimoles of Cu(NO3)2 will produce 5.845 millimoles of Cu(OH)2

Mass of Cu(OH)2 = number of mol * molar mass

= $97.5*5.845*10^-3$

= 0.570 grams

Thus, the correct answer is - 0.570 grams

8 0

3 years ago

1- Oil Spill Pollution Problem Statement (it is written in the form of a question)

anastassius [24]

Oil spill pollution is happening today as we speak. Fracking is one main cause of this oil spill. Sometimes airplanes load oil and dump it in the oceanic ocean and it’s really sad to hear of so.

If this continues to happen, ocean life will decline and key stone species will die meaning the whole biosphere will colapse

3 0

3 years ago

the ph of a solution of HCl in water is found to be 2.50. what volume of water would you add to 1.00L of this solution to raise

morpeh [17]

Answer:

To raise the pH of the solution to 3.10 we have to add 2.34 L of water.

Explanation:

Given that the pH of the solution of HCl in water is 2.5. Here the solution’s pH is changing from 2.5 to 3.10 which means the acidic nature of the solution is decreasing here on dilution. $[H^+]$ ions contribute to a solution’s acidic nature and $[OH^-]$ contribute to a solution’s basic nature.