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3 years ago

Please help me im going out of my way and giving you extra points I really need some assistance

Chemistry

1 answer:

Hitman42 [59]3 years ago

4 0

Answer:

x=2.8moles

Explanation:

first step balance the chemical equation

C2H6+O2-->CO2+2H2O

use more ratio to find the moles of water

1mole of C2H6= 2 moles of H2O

1.4mole of C2H6=?x

cross multiply

x=2.8 moles of H2O

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3 years ago

Read 2 more answers

cooling a sample of matter from 70°c to 10°c at constant pressure causes its volume to decrease from 873.6 to 712.6 cm3. classif

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Explanation:

Expression for the coefficient of thermal expansion is as follows.

$\alpha = \frac{1}{V}(\frac{\Delta V}{\Delta T})$

where, V = initial volume

$\Delta V$ = Final volume - initial volume

= (712.6 - 873.6) $cm^{3}$

= -161 $cm^{3}$

Now, we will calculate the change in temperature as follows.

$\Delta T$ = Final temperature - Initial temperature

= (10 + 273) K - (70 + 273) K

= 283 K - 343 K

= -60 K

Substituting these values into the equation as follows.

$\alpha = \frac{1}{873.6} \times (\frac{161}{60}) K^{-1}$

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