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3 years ago

How many moles of O2 are needed to react with 24 moles of C2H6? 2C2H6 + 702 — 4CO2 + 6H20

Chemistry

1 answer:

Anna11 [10]3 years ago

7 0

Explanation:

Mole ratio of Ethane to Oxygen = 2 : 7

Moles of O2 needed = 24 moles * (7/2) = 84 moles.

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Help out this a quick one

Gemiola [76]

Answer:

Climate

Explanation:

The 3 pieces of evidence are fossils, rocks, and mountain ranges all are included except climate

6 0

3 years ago

A 13.00 g sample of a compound contains 4.15 g potassium (k), 3.76 g chlorine (cl), and oxygen (o). calculate the empirical form

MrRissso [65]

To solve this problem, let us all convert the mass of each element into number of moles using the formula:

moles = mass / molar mass

Where,

molar mass K = 39.10 g / mol

molar mass Cl = 35.45 g / mol

molar mass O = 16 g / mol

and mass O = 13 g – 4.15 g – 3.76 g = 5.09 g

moles K = 4.15 g / (39.10 g / mol) = 0.106 mol

moles Cl = 3.76 g / (35.45 g / mol) = 0.106 mol

moles O = 5.09 g / (16 g / mol) = 0.318 mol

The ratio becomes:

0.106 K: 0.106 Cl: 0.318 O

We divide all numbers with the smallest number, in this case 0.106. This becomes:

K: Cl: 3O

Therefore the empirical formula is:

$KClO_{3}$

7 0

3 years ago

The amount of heat absorbed by the alcohol was determined to be 1.17kJ. Given that the specific heat of the alcohol is 2.42J/gC

quester [9]

Answer:

ΔT = 20.06 °C

Explanation:

The equation used for this problem is as follow,

Q = m Cp ΔT ----- (1)

Where;

Q = Heat = 1.17 kJ = 1170 J

m = mass = 24.1 g

Cp = Specific Heat Capacity = 2.42 J.g⁻¹.°C⁻¹

ΔT = Change in Temperature = ??

Solving eq. 1 for ΔT,

ΔT = Q / m Cp

Putting values,

ΔT = 1170 J / 24.1 g × 2.42 J.g⁻¹.°C⁻¹

ΔT = 20.06 °C

6 0

3 years ago

How many moles of Carbon are in 3.06 g of Carbon

natta225 [31]

Answer:

$\boxed {\boxed {\sf 0.255 \ mol \ C }}$

Explanation:

If we want to convert from grams to moles, the molar mass is used. This is the mass of 1 mole. They are found on the Periodic Table as the atomic masses, but the units are grams per mole (g/mol) instead of atomic mass units (amu).

Look up the molar mass of carbon.

Carbon (C): 12.011 g/mol

Set up a ratio using the molar mass.

$\frac {12.011 \ g \ C}{ 1 \ mol \ C}$

Since we are converting 3.06 grams to moles, we multiply by that value.

$3.06 \ g \ C*\frac {12.011 \ g \ C}{ 1 \ mol \ C}$

Flip the ratio. This way, the ratio is still equivalent, but the units of grams of carbon cancel.

$3.06 \ g \ C* \frac{1 \ mol \ C}{12.011 \ g\ C}$

$3.06 * \frac{1 \ mol \ C}{12.011 }$

$\frac {3.06}{12.011 } \ mol \ C$

$0.25476646 \ mol \ C$

The original measurement of grams (3.06) has 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place.

0.25476646

The 7 in the ten-thousandth place tells us to round the 4 up to a 5.

$0.255 \ mol \ C$

3.06 grams of carbon is approximately 0.255 moles of carbon.

3 0

3 years ago

What volume (in mL) of 0.0887 M MgF2 solution is needed to make 275.0 mL of 0.0224 M MgF2 solution?

Bond [772]

Answer : 69.44 mL

Explanation : Here we can use the formula as $M_{1} V_{1} =M _{2}V_{2}$

Where we have the value of $M_{1}$ = 0.0887 M
$M_{2}$ = 0.0224 M and
$V_{2}$ = 275 mL

So, substituting the above values in the given equation we get,

0.0887 X x = 275 X 0.0224

Therefore, x = 69.44 mL

So it will require 69.44 mL.

4 0

3 years ago