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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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How many molecules are in 2.50 moles of h2o
aivan3 [116]
To find out how many molecules you have, you need to multiply the number of moles with Avogadros constant: 2.50 * 6.022 * 10²³ = 1.5055 * 10^24.
3 0
4 years ago
Read 2 more answers
In a similar experiment, a current of 2.15 amps ran for 8 minutes and 24 seconds. The temperature of the water was 26.0°C. The v
lord [1]

Answer:

\boxed{6.08 \times 10^{23}}

Explanation:

Data:

I = 2.15 A

t = 8 min 24 s

T = 26.0 °C

V = 65.4 mL

p = 774.2 To

1. Write the equation for the half-reaction

2H₂O ⟶ O₂ + 4H⁺ + 4e⁻

2. Calculate the moles of oxygen

p = \text{774.2 To} \times \dfrac{\text{1 atm}}{\text{760 To}} = \text{1.0187 atm}

V = 0.0654 L

T = (26.0 + 273.15) K = 299.15 K

\begin{array}{rcl}pV& = & nRT\\1.0189 \times 0.0654 & = & n \times 0.08206 \times 299.15\\0.06662 & = & 24.55n\\\\n & = & \dfrac{0.06662}{24.55}\\\\n & = & 2.714 \times 10^{-3}\\\end{array}

3. Calculate the moles of electrons

\text{n} = \text{2.714 $\times 10^{-3}$ mol oxygen} \times \dfrac{\text{4 mol electrons}}{\text{ 1 mol ozygen}} = \text{ 0.01086 mol electrons}

4. Calculate the number of coulombs

t = 8 min 24 s =504 s

Q = It = 504 s × 2.10 C·s⁻¹= 1058 C

5. Calculate the number of electrons

\text{No. of electrons} = \text{1058 C} \times \dfrac{\text{1 electron}}{1.602 \times 10^{-19}\text{ C}} = 6.607 \times 10^{21}\text{ electrons}

6. Calculate Avogadro's number

N_{\text{A}} = \dfrac{6.607 \times 10^{21}}{0.01086} = \mathbf{6.08 \times 10^{23}}\\\\\text{The experimental value of Avogadro's number is } \boxed{\mathbf{6.08 \times 10^{23}}}

3 0
4 years ago
how many grams of fertilizer , for potassium sulfate are there in 42.3 mole of potassium sulfate? step by step
Over [174]

Answer:

The mass of 42.3 moles of potassium sulfate is 7,371.1557 grams

Explanation:

Potassium sulfate K₂SO₄ which is also known as sulphate of potash is a water soluble common component of fertilizer

The molar mass of potassium sulfate, M = 174.259 g/mol

The given number of moles of potassium sulfate, n = 42.3 moles

The mass, 'm', of a given number of moles of potassium sulfate, 'n', is given as follows;

m = n × M

Therefore, we have;

The mass, 'm', of 42.3 moles of potassium sulfate is found by plugging in the values for 'M', and 'n', in the above equation as follows;

m = 42.3 moles × 174.259 g/mol = 7,371.1557 grams

The mass of 42.3 moles of potassium sulfate, m = 7,371.1557 grams.

4 0
3 years ago
Lab: Absorption and Radiation by Land and Water Lab Report
Vilka [71]

Answer:

rbbfffffffffffffffffffffffffffffffffffffffffffffffffffffffftttttttt43;iugwwwwwwwt

fffffffffffffffffffffffExplanation:

fffffffffffffffffffffffffff

8 0
2 years ago
Drag each label to the correct location on the image.
sladkih [1.3K]

Answer:

Reactants, the top would be activation energy, the bottom is energy released by reaction, products

Explanation:

5 0
3 years ago
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