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lions [1.4K]
3 years ago
7

At the same temperature and pressure, 1.00 moles of H2 gas occupies

Chemistry
2 answers:
zubka84 [21]3 years ago
6 0
It’s A ! Hoped it helped
tangare [24]3 years ago
6 0
A 2.46mol is the answer
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C

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Because nothing is left at the end of the reaction.

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The velocity of a wave is the product of the frequency and the
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If 0.089 grams of KI is dissolved in 500g of H2O, what is the concentration of the resulting solution in parts per million?
frez [133]

Answer:

The concentration of the resulting solution in parts per million is 177.97

Explanation:

Parts per million (ppm), is a unit of measure for concentration that refers to the number of units of the substance per million units of the set.

The concentration in parts per million expressed in mass / mass is calculated by dividing the mass of the solute (ms) by the mass of the solution (md, sum of the mass of the solute and the mass of the solvent), both expressed in the same unit and multiplied by 10⁶ (1 million).

ppm=\frac{ms}{md} *10^{6}

So, being:

  • ms: 0.089 grams of KI
  • md: 0.089 grams of KI + 500 grams of H₂O= 500.089 grams

Replacing:

ppm=\frac{0.089 grams}{500.089 grams}*10^{6}

ppm= 177.97

<u><em>The concentration of the resulting solution in parts per million is 177.97</em></u>

6 0
3 years ago
1. Which fuel was more efficient (produced more calories per gram)? Explain your answer.
OleMash [197]

Answer:

The comparison is between Fuel canister (diethylene glycol) or Tea candle (paraffin)

The answer is tea candle( paraffin)

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A fuel’s efficiency is based on its reaction with air(oxygen). It is said to be efficient when it burns well when exposed to air(oxygen).

Tea candle( paraffin) burns more efficiently in the presence of oxygen when compared to fuel canister( diethylene glycol) due to the hydrogen bonds in the molecules of fuel canister( diethylene glycol) making it more stable and having a lesser affinity to air (oxygen) than those of tea candle (paraffin).

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3 years ago
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