Water exist as a liquid between 0 and 100 Celsius. a. True b. False

At elevated temperature, carbon tetrachloride decomposes to its elements: CCl4(g) C(s) 2Cl2(g). At 700 K, if the initial pressur

PIT_PIT [208]

Answer:

$K=0.0131M$

Explanation:

Hello,

In this case, the undergoing chemical reaction turns out:

$CCl_4(g) \rightleftharpoons C(s)+ 2Cl_2(g)$

In such a way, by means of the mass of law action for such reaction, which is given below:

$Kp=\frac{p_{Cl_2}^2}{p_{CCl_4}}$

And in terms of the change $x$ due to reaction extent:

$p_{CCl_4}=p_{CCl_4}^0-x\\p_{Cl_2}=2x\\p_T=p_{CCl_4}+p_{Cl_2}=1.00-x+2x\\p_T=1.00+x$

$x$ results:

$x=1.35 atm -1.00atm=0.35atm$

In such a way, Kp:

$Kp=\frac{(2x)^2}{1.00-x} =\frac{(2*0.35atm)^2}{1.00atm-0.35atm}=0.754atm$

Nonetheless, K is asked instead of Kp, thus:

$K=\frac{Kp}{(RT)^{\Delta \nu _{gas}}}$

Whereas:

$\Delta \nu _{gas}=2-1=1$

Which is the change in the moles of gaseous species chlorine and carbon tetrachloride. Hence, we finally obtain:

$K=\frac{0.754atm}{(0.082\frac{atm*L}{mol*K}*700K)^{1}}\\\\K=0.0131mol/L=0.0131M$

Best regards.

8 0

3 years ago

The density of ethanol, C2H5OH, is 0.789 g/mL. How many milliliters of ethanol are needed to produce 15.0 g of CO2 via a combust

bearhunter [10]

The answer is 9.94 ml.

<h3>What is density?</h3>

Density is a word we use to describe how much space an object or substance takes up (its volume) in relation to the amount of matter in that object or substance (its mass).
Another way to put it is that density is the amount of mass per unit of volume. If an object is heavy and compact, it has a high density.

Given,

The density of ethanol, C2H5OH = 0.789 g/mL

$n (CO_{2} ) = \frac{m}{M} = \frac{15G}{44 g/mol} } = 0.341 mol;$

$n ( C_{2} H_{2} OH) = \frac{n (CO_{2}) }{2} = \frac{0.341}{2} = 0.1705 mol;$

$m (C_{2} H_{2} OH) = 0.1705 mol * 46 g/ mol$ = 7.843 g

$V (C_{2} H_{2} OH ) = \frac{7.843}{0.789} = 9.94 ml.$

Therefore, the answer is 9.94 ml

Learn more about density of ethanol,

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The complete question is -

If the density of ethanol, C2H5OH, is 0.789 g/mL. How many milliliters of ethanol are needed to produce 15.0 g of CO2 according to the following chemical equation?

C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l)

5 0

2 years ago

The nh2cl model consists of balls and sticks. the electrons in the molecule are paired, and each stick represents a valence elec

tangare [24]

Valence electrons in NH2Cl:

=1(5)*2(1)*1(7)

=14

So there are 14 valence electrons in NH2Cl

As each stick represents an valence electron pair.

And there are 14 valence electrons, so there can be 7 valence electron pairs.

And for 7 valence electron pairs, 7 sticks needed.