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igor_vitrenko [27]
3 years ago
11

Which statement describes an important role of carbon dioxide in Earth's atmosphere?

Chemistry
1 answer:
gayaneshka [121]3 years ago
6 0
Plants use carbon dioxide to make food.
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Which of the following combinations would you need an electroplating apparatus to coat the first metal onto the second metal
ivolga24 [154]

Answer:

nickel onto iron.

7 0
3 years ago
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PLEASE HELP I WILL GIVE YOU 50 POINTS
Tamiku [17]
According to Raoult's law, Vapor pressure is directly proportional to the mole fraction of the solution. As 1.0 M CaF2 has least moles here, it has lowest vapor pressure.

In short, Your Answer would be Option D

Hope this helps!
8 0
3 years ago
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When a hydrochloric acid solution is combined with a potassium hydroxide solution, an acid-base reaction occurs Write a balanced
Svetach [21]

Answer:

HCl(aq) + KOH(aq) ⇒ KCl(aq) + H₂O(l)

Explanation:

Hydrochloric acid is an acid because it releases H⁺ in an aqueous solution.

Potassium hydroxide is a base because it releases OH⁻ in an aqueous solution.

When an acid reacts with a base they form a salt and water. This is a neutralization reaction. The neutralization reaction between hydrochloric acid and potassium hydroxide is:

HCl(aq) + KOH(aq) ⇒ KCl(aq) + H₂O(l)

7 0
4 years ago
Find the pH of a 0.350 M aqueous benzoic acid solution. For benzoic add. Ka = 6.5 x 10^-5.
slava [35]

Answer:

correct option is (a)

The solution would be using this: C6H5COOH = H+ + C6H5COO Ka = 6.5 x 10^-5 = (H+)(C6H5COO-) over

(C6H5COOH)

Let X = moles per liter (H+) and also = moles per liter (C6H5COO-)

Ka = 6.5 x 10^-5 = (X)(X) over .350 molar = acid solution 6.5 x 10^-5 = X^2 over .350

X^2 = 6.5 x 10^-5 times .350 which = 2.275 x 10^-5

x = V2.275 x 10^-5

X = 1.5083 x 10^-5 moles per liter H+

pH = -log(H+) = -log 1.5083 x 10^-5 which

= 4.6215

7 0
3 years ago
HELPPPPP!!!
Arturiano [62]

Answer: a) arsenic

Explanation:

5 0
3 years ago
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