All categories

3 years ago

I NEED HELP PLEASE! (Made it worth A LOT of points!!!)

Chemistry

1 answer:

Scilla [17]3 years ago

4 0

Answer:

the third one.

Explanation:

You might be interested in

How are atoms grouped on the periodic table

alex41 [277]

The periodic table<span> organizes the chemical elements according to the number of protons that each has in its atomic nucleus.</span>

3 0

3 years ago

What is the electronegativity difference for a bond between potassium and iodine? A. 3.3 B. 4.6 C. 0.4 D. 1.7

user100 [1]

Iodine has an electronegativity of 2.5, and potassium has an electronegativity of 0.8, so the difference is:
2.5 - 0.8 = 1.7

7 0

4 years ago

Read 2 more answers

HELP WITH SIMPLE ELECTROCHEM QUESTION

Oksi-84 [34.3K]

I think no and yes I’m not sure I haven’t covered that subject so much sorry if I’m wrong tho pls check my questions pls I only have one

8 0

3 years ago

Two linear hydrocarbons, Hexane (C6H14) and Heptane (C7H16), form pretty much an ideal solution at any composition. A solution i

Anettt [7]

Answer:

$y_{C_6H_{14}}=0.92$

Explanation:

Hello,

At first, we compute liquid-phase molar fractions:

$n_{C_6H_{14}}=463.96 g*\frac{1mol}{86g} =5.3949molC_6H_{14}\\n_{C_7H_{16}}=667.71 g*\frac{1mol}{100g} =6.6771molC_7H_{16}\\x_{C_6H_{14}}=\frac{5.3949}{5.3949+6.6771} =0.447\\x_{C_7H_{16}}=1-x_{C_6H_{14}}=0.553$

Now, by means of the fugacity concept, for hexane, for instance, we have:

$f_{C_6H_{14}}^V=f_{C_6H_{14}}^L\\y_{C_6H_{14}}p_T=x_{C_6H_{14}}p_{C_6H_{14}}$

In this manner, at 25 °C the vapor pressure of hexane and heptane are 0.198946 atm and 0.013912 atm repectively, thus, the total pressure is:

$p_T=x_{C_6H_{14}}p_{C_6H_{14}}+x_{C_7H_{16}}p_{C_7H_{16}}\\p_T=0.447*0.198946 atm +0.553*0.013912 atm=0.096622atm$

Finally, from the hexane's fugacity equation, we find its mole fraction in the vapour as:

$y_{C_6H_{14}}=\frac{x_{C_6H_{14}}p_{C_6H_{14}}}{p_T}=\frac{0.447*0.198946 atm}{0.096622atm} \\y_{C_6H_{14}}=0.92$

Best regards.

3 0

3 years ago

Read 2 more answers

What type of bond is formed between the oxygen atom of one water molecule and the hydrogen atom of another water molecule? what

Scilla [17]

Answer:

The bond formed is a polar covalent bond.

7 0

4 years ago

Read 2 more answers