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mariarad [96]
4 years ago
10

The boiling temperature of water is so much higher than that of methane because water molecules are

Chemistry
1 answer:
enyata [817]4 years ago
6 0
They are bousing every where and it became a gass
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Sunidhi made a study chart about changes in states of matter. Which headings best complete the chart? X: Solid Directly to Liqui
mixas84 [53]

Answer:

The answer is "freezing and melting sublimating x y".

Explanation:

In the given question, the given table name is used as the matter condition, which is freezing or melting sublimation x y, that must be the best headings throughout order to cancel a column of state of matter.

The process goes from the solid-state to a gaseous state, that is achieved by bringing heat into another system.

3 0
3 years ago
Why does a reaction slow down wit time​
Paha777 [63]

Explanation:

As the reaction progresses, less surface area becomes available and, thus, the reaction slows down until eventually there is nothing left to react. Of course, there are ways to increase the reaction rate; namely by adding a catalyst (such as liver).

6 0
4 years ago
How much 10.0 M HNO must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium acetate to reduce the pH
Naya [18.7K]

Explanation:

It is given that molarity of acetic acid = 0.0100 M

Therefore, moles of acetic acid = molarity of acetic acid × volume of buffer

            Moles of acetic acid = 0.0100 M × 1.00 L

                                              = 0.0100 mol

Similarly, moles of acetate = molarity of sodium acetat × volume of buffer

                                           = 0.100 mol

When HNO_{3} is added, it will convert acetate to acetic acid.

Hence, new moles acetic acid = (initial moles acetic acid) + (moles HNO_{3})

                                                = 0.0100 mol + x

New moles of sodium acetate = (initial moles acetate) - (moles HNO_{3})

                                        = 0.100 mol - x

According to Henderson - Hasselbalch equation,

           pH = pK_{a} + log\frac{[conjugate base]}{[weak acid]}

             pH = pKa + log\frac{(new moles of sodium acetate)}{(new moles of acetic acid)}

           4.95 = 4.75 + log\frac{(0.100 mol - x)}{(0.0100 mol + x)}

       log\frac{(0.100 mol - x)}{(0.0100 mol + x)}  = 4.95 - 4.75

                                            = 0.20

\frac{(0.100 mol - x)}{(0.0100 mol + x)}  = antilog (0.20)

                                           = 1.6

Hence,    x = 0.032555 mol

Therefore, moles of HNO_{3} = 0.032555 mol

volume of HNO_{3} = \frac{moles HNO_{3}}{molarity of HNO_{3}}

                                = \frac{0.032555 mol}{10.0 M}

                                 = 0.0032555 L

or,                             = 3.25           (as 1 L = 1000 mL)

Thus, we can conclude that volume of HNO_{3} added is 3.26 mL.

5 0
3 years ago
If bald people work in a restaurant, do they still need to wear a hairnet?<br> Please help
telo118 [61]

Answer:

* android noises *

Explanation:

I don’t think they have to

3 0
3 years ago
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opnTens Location: Test: Question 1 of 40)ToolsThermal energy travels through space from the Sun to Venus. This is an example ofA
Natasha_Volkova [10]
B. Radiation Thermal energy from the sun fto Venus.
4 0
3 years ago
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