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2 years ago

What is a potential benefit of fuel cell cars?

Chemistry

2 answers:

abruzzese [7]2 years ago

5 0

Answer:

Explanation:

77julia77 [94]2 years ago

3 0

Answer:

no recharging necessary

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Which is the correct formula for the compound whose percent composition is shown?

miv72 [106K]

File:///Users/user/Downloads/Chemistry%20Exam%20Study%20Guide%20Fall%202012.pdf

Idk if this will help you, cuz it says what question are going to be in ur final

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2 years ago

I need this very fast so please answer this first! I will mark you as the Brainiest and put my max points so please hurry!!!

Korolek [52]

Answer:

Answer C

Explanation:

Heat is used to turn the solid ice into liquid water

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2 years ago

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What is the SI unit of mass? Select one: a.Ounce b.Pound c.Gram d.Newton

Varvara68 [4.7K]

the SI unit of mass is kilogram

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2 years ago

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What is the concentration of OH − and pOH in a 0.00066 M solution of Ba ( OH ) 2 at 25 ∘ C? Assume complete dissociation.

Allushta [10]

Answer: The hydroxide ion concentration and pOH of the solution is $1.32\times 10^{-3}M$ and 2.88 respectively

Explanation:

We are given:

Concentration of barium hydroxide = 0.00066 M

The chemical equation for the dissociation of barium hydroxide follows:

$Ba(OH)_2\rightarrow Ba^{2+}+2OH^-$

1 mole of barium hydroxide produces 1 mole of barium ions and 2 moles of hydroxide ions

pOH is defined as the negative logarithm of hydroxide ion concentration present in the solution

To calculate pOH of the solution, we use the equation:

$pOH=-\log[OH^-]$

We are given:

$[OH^-]=(2\times 0.00066)=1.32\times 10^{-3}M$

Putting values in above equation, we get:

$pOH=-\log(1.32\times 10^{-3})\\\\pOH=2.88$

Hence, the hydroxide ion concentration and pOH of the solution is $1.32\times 10^{-3}M$ and 2.88 respectively

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3 years ago

What is the most important simlarity between rusting and burning?

KengaRu [80]

Both are oxidation reactions. Burning is just a lot faster than rusting.

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2 years ago