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lbvjy [14]
3 years ago
10

นักเรียนคิดว่าพันธะโฮโดรเจนกับพันธะในโมเลกุลของโฮโดรเจนเหมือนกันหรือต่างกันอย่างไร

Chemistry
1 answer:
Arada [10]3 years ago
5 0
<span>พันธะไฮโดรเจนเป็นแรงที่เกิดขึ้นระหว่างโมเลกุลที่สร้างขึ้นเมื่ออะตอมของไฮโดรเจนถูกยึดติดกับอะตอมของคลื่นแม่เหล็กไฟฟ้าที่อยู่ใกล้ ๆ การดูดกลืนของพันธะไฮโดรเจนมากขึ้นจะส่งผลให้ความแข็งแรงพันธะไฮโดรเจนเพิ่มมากขึ้น พันธะไฮโดรเจนเป็นหนึ่งในสถานที่ท่องเที่ยวระดับโมเลกุลที่แข็งแกร่ง แต่อ่อนแอกว่าโควาเลนต์หรือพันธะไอออนิก พันธะไฮโดรเจนมีหน้าที่ในการยึด DNA, โปรตีนและโมเลกุลอื่น ๆ ไว้</span>
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1/2-life of pyruvic acid in the presence of aminotransferase enzyme (which converts it to alanine) was found to be 221 s. how lo
Ugo [173]

Answer:

After 1326s, the concentration of pyruvic acid fall to 1/64 of its initial concentration.

Explanation:

The first order kinetics reaction is:

ln [A] = ln [A]₀ - kt

<em>Where [A] is concentration after t time, [A]₀ is intial concentration and k is reaction constant.</em>

To convert half-life to k you must use:

t(1/2) = ln 2 / K

221s = ln 2 / K

K = ln 2 / 221s

<h3>K = 3.1364x10⁻³s⁻¹</h3>

If [A] = 1/64, [A]₀ = 1:

ln [A] = ln [A]₀ - kt

ln (1/64) = ln 1 - 3.1364x10⁻³t

4.1588 = 3.1364x10⁻³s⁻¹t

1326s = t

<h3>After 1326s, the concentration of pyruvic acid fall to 1/64 of its initial concentration.</h3>

<em />

6 0
3 years ago
PLEASE ANSWER ASAP!!!!!!! 50 points if the answer is correct!
Ad libitum [116K]

5

 mL acetic acid

95

mL water

Explanation:

Since

5

%

of the vinegar, by volume, is acetic acid, and we have

100

mL of vinegar, we have

5

mL of vinegar.

Similarly, we have

100

%

−

5

%

=

95

%

being water, so we have

95

mL of water.

8 0
2 years ago
Calcium nitrate tetrahydrate dissolves in cold water to the extent of 266 g per 100 cm3. What is the concentration of nitrate io
Soloha48 [4]

Answer : The correct option is, (b) 22.5 M

Explanation : Given,

Mass of calcium nitrate tetrahydrate = 266 g

Molar mass of calcium nitrate tetrahydrate  = 236.15 g/mole

Volume of solution = 100cm^3=100mL

Molarity : It is defined as the moles of solute present in one liter of solution.

Formula used :

Molarity=\frac{\text{Mass of calcium nitrate tetrahydrate }\times 1000}{\text{Molar mass of calcium nitrate tetrahydrate }\times \text{volume of solution in ml}}

Now put all the given values in this formula, we get:

Molarity=\frac{266g\times 1000}{236.15g/mole\times 100ml}=11.26mole/L=11.26M

As calcium nitrate tetrahydrate dissociate to give 1 mole of calcium ion, 2 moles of nitrate ion and 4 moles of water.

The concentration of nitrate ion = 2\times 11.26M=22.5M

Thus, the concentration of nitrate ion is, 22.5 M

4 0
3 years ago
PLS HELPPPP NOWWWW!!!!
dedylja [7]
When in doubt pick C I don’t really know the answer but I just pick C
8 0
2 years ago
What was the eutectic temperature (temperature from the two lines of best fit cross) for the mixture
Ymorist [56]

Answer:

hello your question is incomplete below is the missing part of the question

answer : 104°c

Explanation:

The Eutectic temperature  for the mixture is 104°c

From the chart attached below it can be seen that the temperature from the two lines of best fit cross is 104°c

7 0
2 years ago
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