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Dmitry_Shevchenko [17]
3 years ago
14

Scientists have discovered how to use electricity to power cars. We have all seen ads for the new hybrids on television. Running

cars on electricity could help
A: conserve gasoline.

B: the big oil companies.

C: pollute the atmosphere

D:use up mineral resources.
Chemistry
1 answer:
Trava [24]3 years ago
4 0

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

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The gas phase decomposition of phosphine at 120 °C PH3(g) 1/4 P4(g) + 3/2 H2(g) is first order in PH3 with a rate constant of 1.
maks197457 [2]
<span>Answer: 5.32 x 10⁻³ M


Explanation:


1) The rate law for a first order reaction is:
</span><span />

<span>r = - d [A] / dt = k[A]
</span><span />

<span>2) When you integrate you get:
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<span> [ A] = Ao x e ^(-kt)
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Remember that here A is PH₃

<span>3) Plug in the data: Ao = 0.0316M, k = 0.0180 /s, and t = 99s
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<span>[PH₃] = 0.0316 M x e ^( - 0.0180/s x 99s) = 5.32 x 10⁻³ M</span>
3 0
3 years ago
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How many moles of HNO3 will be produced 3 NO2+H2O=2HNO3+ NO
valkas [14]

Answer:

2 moles of HNO3

Explanation:

The equation seems to be balanced correctly. The problem is we done know what you started with. We will assume it is 3 moles of NO2.

If that is the case then 2 moles of HNO3 will be produced.

8 0
3 years ago
Please help with this , it’s very important
timurjin [86]

Explanation:

a) Cr is <u>acid</u> K is <u>base</u>

b) Ca is <u>base</u> and the other left part is <u>acid</u>

c)Ca is <u>base</u> and F2 is <u>acid</u>

<u>d</u><u>)</u><u> </u>NH4 is <u>acid</u> and SO4 is <u>base</u>

5 0
3 years ago
Which reaction will occur? 2NaBr I2 Right arrow. 2NaI Br2 2Fe Al2O3 Right arrow. 2Al Fe2O3 2AgNO3 Ni Right arrow. Ni(NO3)2 2Ag P
Likurg_2 [28]

The reaction that has been occurred will be \rm 2\;Fe\;+\;Al_2O_3\;\rightarrow\;2\;Al\;+\;Fe_2O_3.

The chemical reaction has been defined as the interaction of the reactant  molecules for the formation of the product. The changes have been taken place in the reactivity series and under specific conditions.

<h3>Reaction occur</h3>

The displacement reaction has been taken place based on the reactivity series. The more reactive element has been able to displace the less reactive element in the compound and form a new compound.

The following reactions have been analyzed as:

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In the reaction, Br has been replaced by Iodine. The iodine has been less reactive than Br and thus will not form the compound.

Thus, this reaction will not occur.

  • \rm 2\;Fe\;+\;Al_2O_3\;\rightarrow\;2\;Al\;+\;Fe_2O_3

In the reaction, Al has been replaced by Fe. The Fe is more reactive than Al. thus this reaction will occur.

  • \rm 2\;AgNO_3\;+\;Ni\;\rightarrow\;Ni(NO_3)_2\;+\;2\;Ag

The nickel has been less reactive than Ag, and thus will not be able to form the product.

Thus, this reaction will not occur.

  • \rm Pb\;+\;Zn(C_2H_3O_2)_2\;\rightarrow\;Zn\;+\;Pb(C_2H_3O_2)_2

The lead has been less reactive than Zn, and thus will not be able to form the product.

Thus, this reaction will not occur.

The reaction that has been occurred will be \rm 2\;Fe\;+\;Al_2O_3\;\rightarrow\;2\;Al\;+\;Fe_2O_3.

Learn more about reactivity series, here:

brainly.com/question/10443908

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What happens when the amoeba proteus is placed in distilled water?
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Crazy stuff, it will bubble up and flow over
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