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andrey2020 [161]
2 years ago
8

If 32 L of hydrogen react with excess oxygen at STP to form water, how much energy will be released?

Chemistry
1 answer:
Fudgin [204]2 years ago
4 0

Answer:

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Explanation:

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Write a balanced chemical equation for the standard formation reaction of liquid acetic acid hch3co2.
Afina-wow [57]

The balanced chemical equation for the standard formation reaction of liquid acetic acid is given as ,

2C(gr) +2H_{2} (g) +O_{2} (g)  → CH_{3} COOH(l)

The reaction that form the products from their elements in their standard state is called formation of reaction .The acetic acid consist C , H , and O , So, determine their standard state . Carbon is graphite at 25°C and 1 atm , whereas hydrogen and oxygen are diatomic gases . Hence , we start with unbalanced reaction.

C(gr) +H_{2} (g) +O_{2} (g) → CH_{3} COOH(l)

The balanced chemical equation for the standard formation reaction of liquid acetic acid as,

2C(gr) +2H_{2} (g) +O_{2} (g)  → CH_{3} COOH(l)

The combustion of liquid acetic acid is given as,

CH_{3} COOH(l) + 2O(g) → 2CO_{2}((g) +2H_{2} O(l)                    ΔH =-873

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5 0
2 years ago
An unknown substance is obtained by police. The forensics laboratory has
timurjin [86]

Answer:

70.0 %

Explanation:

Step 1: Given data

  • Mass of nitrogen (mN): 74.66 g
  • Mass of the compound (mNxOy): 250 g

Step 2: Calculate the mass of oxygen (mO) in the compound

The mass of the compound is equal to the sum of the masses of the elements that form it.

mNxOy = mN + mO

mO = mNxOy - mN

mO = 250 g - 74.66 g = 175 g

Step 3: Determine the percent composition of oxygen in the sample

We will use the following expression.

%O = mO / mNxOy × 100%

%O = 175 g / 250 g × 100% = 70.0 %

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3 years ago
Periodiate has how many oxygen<br> 2<br> 3<br> 4?
Roman55 [17]

Answer:

4

Explanation:

it has 4 oxygen

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Which represents an endothermic reaction? wood burning in a fire splitting a gas molecule changing frost to water vapor TNT expl
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changing frost into water vapors.

Explanation:

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Which is a column running up and down in the periodic table?
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It is a period.....
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