Chemistry, 28.08.2019 04:30 ddarby

What mass of carbon dioxide would be produced if 100g of butane (c4h10) are completely oxidized to carbon dioxide and water?

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Answer from: accis

Answer : The mass of carbon dioxide produced will be, 303.424 grams.

Explanation : Given,

Mass of butane = 100 g

Molar mass of butane = 58 g/mole

Molar mass of carbon dioxide = 44 g/mole

The balanced chemical reaction will be,

$2C_4H_{10}+13O_2\rightarrow 8CO_2+10H_2O$

First we have to calculate the moles of $C_4H_{10}$

$\text{Moles of }C_4H_{10}=\frac{\text{Mass of }C_4H_{10}}{\text{Molar mass of }C_4H_{10}}=\frac{100g}{58g/mole}=1.724moles$

Now we have to calculate the moles of CO_2

From the balanced reaction, we conclude that

As, 2 moles of butane react to give 8 moles of carbon dioxide

So, 1.724 moles of butane react to give $\frac{8}{2}\times 1.724=6.896$ moles of carbon dioxide

Now we have to calculate the mass of CO_2

$\text{Mass of }CO_2=\text{Moles of }CO_2\times \text{Molar mass of }CO_2$

$\text{Mass of }CO_2=(6.896mole)\times (44g/mole)=303.424g$

Therefore, the mass of carbon dioxide produced will be, 303.424 grams.

Answer from: Quest

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

Answer from: Quest

answer: e. sour taste

explanation: acids are those substances which dissociates in water to give $h^+$ ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

$hcl\rightarrow h^++cl^-$

bases are those substances which dissociates in water to give $oh^-$ ions or accepts $h^+$ ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

$naoh\rightarrow na^++oh^-$

$nh_3+h^+\rightarrow nh_4^+$

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What mass of carbon dioxide would be produced if 100g of butane (c4h10) are completely oxidized to c...