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4 years ago

What comes first in a thunderstorm?

Chemistry

1 answer:

Vedmedyk [2.9K]4 years ago

8 0

It's the sound before the lightning because sound travels faster than light.

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Assume that the complete combustion of one mole of glucose to carbon dioxide and water liberates 2870 kJ/mol2870 kJ/mol ( Δ????°

MaRussiya [10]

Answer:

Number of contraction cycles that could theoretically be fueled by the complete combustion of one mole of glucose is around 17

Explanation:

Energy released during the complete combustion of 1 mole glucose = 2870 kJ

Energy required/muscle contraction cycle = 67 kJ/contraction

Energy conversion efficiency = 39%

Actual amount of energy converted to contraction per mole of glucose is:

$=\frac{39}{100} *2870 kJ=1119.3 kJ$

Total contraction cycles fueled by the above energy is:

$=\frac{1119.3\ kJ}{67\ kJ/contraction} =16.7\ i.e.\ around\ 17\ contractions$

5 0

3 years ago

How are acids and bases similar and different

const2013 [10]

Answer & Explanation:

<u>Similarities:</u>

Both acids and bases are electrolytes which means that they're good conductors of electricity.

Acids and bases both produce ions in water solution.

<u>Difference:</u>

Acids release hydrogen ions (H⁺) whereas, bases release hydroxide ions (OH⁻).

6 0

4 years ago

Four gases were combined in a gas cylinder with these partial pressures: 3. 5 atm N2, 2. 8 atm O2, 0. 25 atm Ar, and 0. 15 atm H

aksik [14]

The total pressure of the gas has been 11.9 atm.

The partial pressure has been the pressure exerted by the individual gas in the mixture.

According to the Dalton's law of Partial pressure, the pressure of the gas has been the sum of the partial pressure of each gas in the mixture.

<h3 /><h3>Computation for the pressure of gas</h3>

The given gas has partial pressure of Nitrogen, $P_{N_2}=3.5\;\rm atm$

The partial pressure of Oxygen, $P_{O_2}=8\;\rm atm$

The partial pressure of Argon, $P_{Ar}=0.25\;\rm atm$

The partial pressure of Helium, $P_{He}=0.15\;\rm atm$

The total pressure, (<em>P</em>) of the gas has been given as:

$P=P_{N_2}\;+\;P_{O_2}\;+\;P_{Ar}\;+\;P_{He}\\
P=3.5\;+8\;+\;0.25\;+\;0.15\;\text{atm}\\
P=11.9\;\rm atm$

The total pressure of the gas has been 11.9 atm.

Learn more about the vapor pressure, here:

brainly.com/question/25356241

7 0

3 years ago

How many moles of N₂ are essential for generating 0.08 moles of Li₃N in the given reaction?

joja [24]

Each mole of N₂ generates 2 moles of Li₃N. Thus,
0.08 moles of Li₃N will require:
0.08 / 2
= 0.04 moles of N₂

The second option is correct.

4 0

3 years ago

Methane, CH4, burns in oxygen gas to form water and carbon dioxide.

Lemur [1.5K]

$ch4 + 202 2h20 + co2$

CH4 + 2O2 --> 2H2O +CO2

6 0

3 years ago