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3 years ago

15

during the combustion of methane one mole of methane gas combines with two moles of oxygen gas to produce one mole of carbon dio

xide gas and to moles of water vapor. write the chemical equation that correctly represents the combustion of methane described above

1 answer:

lubasha [3.4K]3 years ago

6 0

CH4(g)+2O2(g)->CO2(g)+H2O(g)

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An iron ore was found to contain 92.0% pyrite (fool's gold). Pyrite has the formula FeS2and is 46.5% iron. How many grams of iro

Liula [17]

Firstly calculate the grams in the last 8 percent before moving onto the pyrite section.
50.8x0.08=4.064g
We know that iron ore in this case has 92 percent pyrite which contains 46.5 percent iron so we do 50.8x0.92=46.736g from this we need to find 46.5 percent of the iron content in the 92 percent pyrite section then add this answer to the 8 percent of iron ore we found at the start.46.736x0.465=21.73224g
21.73224g+4.064=25.79624g of iron ore 25.8g(3sf)

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3 years ago

Sergio039 [100]

Answer: is neither an acid nor a base

Explanation: Water is a universal solvent which means it can dissolve most of the substances in it.

Water has high thermal heat capacity , which means large heat is required to heat the water.

Water is not always pure as it gets contaminated by various pollutants present in the atmosphere such as gases, bacteria and suspended matter.

Water is an amphoteric substance which can act as both acid and base, thus can donate and acept [texH^+[/tex] ions.Thus it is neither an acid nor a base.

$HCl+H_2O\rightarrow H_3O^++Cl^-$

Here water is accepting a proton, thus it acts as base.

$NH_3+H_2O\rightarrow NH_4^++OH^-$

Here water is donating a proton, thus it acts as acid.

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3 years ago

Which plant has a shorter orbit. Earth or Mars

Jet001 [13]

Answer:

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Explanation:

BRAINLIEST PLZ

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Each element absorbs light at specific wavelengths unique to that atom. When astronomers look at an object's spectrum, they can determine its composition based on these wavelengths. The most common method astronomers use to determine the composition of stars, planets, and other objects is spectroscopy.
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3 years ago

Which phrase describes a valence electron?(1 point)

liraira [26]

Answer: I THINK C

Explanation: It has a 25% chance of being right so I'd wait if I were you just sayin

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2 years ago

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