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2 years ago

How many moles of methane are produced when 82.6 moles of carbon dioxide gas react with excess hydrogen gas?

Chemistry

1 answer:

aksik [14]2 years ago

7 0

Answer:

82.6 moles

Explanation:

chemical equation:

CO2+ 4H2 → CH4 + 2H2O

Given data:

moles of carbon dioxide = 82.6 mol

moles of methane = ?

through the balanced chemical equation we will compare the moles carbon dioxide with methane

CO2 : CH4

1 : 1

82.6 : 82.6

we are given hydrogen so 82.6 moles of carbon dioxide will produce 82.6 moles of methane.

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A compound contains 1.2 g of carbon, 3.2 g of oxygen and 0.2g of hydrogen. Find the formula of the compound

Karolina [17]

Answer:

The empirical formula of the compound is $C_{0.504}HO_{1.008}$ .

Explanation:

We need to determine the empirical formula in its simplest form, where hydrogen ( $H$ ) is scaled up to a mole, since it has the molar mass, and both carbon ( $C$ ) and oxygen ( $O$ ) are also scaled up in the same magnitude. The empirical formula is of the form:

$C_{x}HO_{y}$

Where $x$ , $y$ are the number of moles of the carbon and oxygen, respectively.

The scale factor ( $r$ ), no unit, is calculated by the following formula:

$r = \frac{M_{H}}{m_{H}}$ (1)

Where:

$m_{H}$ - Mass of hydrogen, in grams.

$M_{H}$ - Molar mass of hydrogen, in grams per mole.

If we know that $M_{H} = 1.008\,\frac{g}{mol}$ and $m_{H} = 0.2\,g$ , then the scale factor is:

$r = \frac{1.008}{0.2}$

$r = 5.04$

The molar masses of carbon ( $M_{C}$ ) and oxygen ( $M_{O}$ ) are $12.011\,\frac{g}{mol}$ and $15.999\,\frac{g}{mol}$ , then, the respective numbers of moles are: ( $r = 5.04$ , $m_{C} = 1.2\,g$ , $m_{O} = 3.2\,g$ )

Carbon

$n_{C} = \frac{r\cdot m_{C}}{M_{C}}$ (2)

$n_{C} = \frac{(5.04)\cdot (1.2\,g)}{12.011\,\frac{g}{mol} }$

$n_{C} = 0.504\,moles$

Oxygen

$n_{O} = \frac{r\cdot m_{O}}{M_{O}}$ (3)

$n_{O} = \frac{(5.04)\cdot (3.2\,g)}{15.999\,\frac{g}{mol} }$

$n_{O} = 1.008\,moles$

Hence, the empirical formula of the compound is $C_{0.504}HO_{1.008}$ .

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2 years ago

A plant takes in carbon dioxide through small pores called stomata present in the leaves. Which process is the plant most likely

goblinko [34]

I think The answer is photosynthesis

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2 years ago

Read 2 more answers

1.<br> How does light behave when it is shined on an object?

Mariulka [41]

Answer:

Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. For a smooth surface, reflected light rays travel in the same direction.

Explanation:

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2 years ago

Which direction does the decimal move from mega meters to meters

Temka [501]

To solve this problem, let us first understand what does mega meters mean. Now by definition, mega means a factor of one million which is a unit prefix in Metric Systems of units. It is denoted by the unit symbol M.

So for example if we have a mega of something, it means a million of something. So in this case, if we have 1 mega meter, what it means is 1 million meter, which is written as:

1 mega meter = 1,000,000 meter

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1.0 mega meter = 1,000,000.0 meter

So we see that the decimal point move 6 zeroes to the right, therefore the direction is to the right.

Answer:

<span>6 places to the right</span>

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