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3 years ago

Consider the molecules H2O, H2S, H2Se, and H2Te. Which do you expect to have the highest boiling point, and why?

Chemistry

1 answer:

STatiana [176]3 years ago

5 0

Answer:

a. H20,because it experiences hydrogen bonding.

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What is the concentration (M) of CH3OH in a solution prepared by dissolving 11.7 g of CH3OH in sufficient water to give exactly

Andrej [43]

Answer:

$3.65~M$

Explanation:

We have to remember the molarity equation:

$M=\frac{mol}{L}$

So, we have to calculate "mol" and "L". The total volume is 100 mL. So, we can do the conversion:

$100~mL\frac{1~L}{1000~mL}=~0.1~L$

Now we can calculate the moles. For this we have to calculate the molar mass:

O: 16 g/mol

H: 1 g/mol

C: 12 g/mol

$(16*1)+(1*4)+(12*1)=32~g/mol$

With the molar mass value we can calculate the number of moles:

$1.7~g~of~CH_3OH\frac{1~mol~CH_3OH}{32~g~of~CH_3OH}=0.365~mol~CH_3OH$

Finally, we can calculate the molarity:

$M=\frac{0.365~mol~CH_3OH}{0.1~L}=3.65~M$

I hope it helps!

7 0

3 years ago

Quick question! Help please!

mel-nik [20]

Hope this helps and have a nice day!

6 0

4 years ago

Read 2 more answers

Methyl red is a common azo dye. Which starting materials are used to prepare it?

Licemer1 [7]

Answer:

1. Diazonium salt

2. Coupling component

Explanation:

Azo dyes re synthesized by the combination of two organic compounds viz

1. Diazonium salt

2. Coupling component

1) For methyl red, the diazonium salt which is an intermediate product is produced by the reaction of hydrochloric acid (HCL) with anthranilic acid and sodium nitrate (NaNO₂)

2) The produced diazonium salt is then combined with dimethylaniline which is a coupling component rich in electrons to undergo a chemical reaction that by an aromatic substitution mechanism to produce methyl red as the final product.

8 0

3 years ago

HELP ASAP!! 15 PTS!! Match each of the unknown ions to its appropriate description.

jok3333 [9.3K]

Answer:

1 and a

2 and b

3 and c

4 and d

Explanation:

+ = gained

- = lost

when there is a two it has two electrons

I also had a high school friend check my accuracy

HOPE THIS HELPS!!!! :)

<3333333333

8 0

4 years ago

While under constant pressure, the temperature of 892 mL of a gas is changed from 193 °C to 144 °C. What is the new gas volume?

galina1969 [7]

Answer:

please mark my answer brainliest

Explanation:

nice question...

ok solution goes right the way through...

in temp 193°C the volume of gas was 892ml

so for...144°C the volume of gas will be 892/193x144=665.533 or 665.534...(rounded off)...or 665°...(approx)....so got ur answer...

I hope it helps....

please comment if you have any further questions...i will be solving it for u...

please mark my answer brainliest

7 0

4 years ago