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3 years ago

What electrostatic attraction between____ forms an ionic bond?

Chemistry

1 answer:

lina2011 [118]3 years ago

4 0

Between atoms (one metall and one non metall) form an ionic bond(NaCl)

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Convert 2.8 x10^27 molecules of N2O5 to grams

liraira [26]

Answer:

2.41 molecules

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5 0

2 years ago

The ionization constant of lactic acid ch3ch(oh) co2h am acid found in the blood after strenuous exercise is 1.36×10^-4 If 20.0g

lana66690 [7]

Answer:

Explanation:

CH₃CHOHCOOH ⇄ CH₃CHOHCOO⁻ + H⁺

ionisation constant = 1.36 x 10⁻⁴ .

molecular weight of lactic acid = 90 g

moles of acid used = 20 / 90

= .2222

it is dissolved in one litre so molar concentration of lactic acid formed

C = .2222M

Let n be the fraction of moles ionised

CH₃CHOHCOOH ⇄ CH₃CHOHCOO⁻ + H⁺

C - nC nC nC

By definition of ionisation constant Ka

Ka = nC x nC / C - nC

= n²C ( neglecting n in the denominator )

n² x .2222 = 1.36 x 10⁻⁴

n = 2.47 x 10⁻²

nC = 2.47 x 10⁻² x .2222

= 5.5 x 10⁻³

So concentration of hydrogen or hydronium ion = 5.5 x 10⁻³ g ion per litre .

6 0

3 years ago

In a laboratory experiment the reaction of 3.0 mol of H2 with 2.0 mol of I2 produced 1.0 mole of HI. Determine theoratical yield

Kobotan [32]

Answer:

Theoretical yield of HI is 512 g.

The percent yield for this reaction is 25%.

Explanation:

$H_2+I_2\rightarrow 2HI$

Moles of hydrogen gas = 3.0 moles

Moles of iodine gas = 2.0 moles

According to reaction 1 mol of hydrogen gas reacts with 1 mol of iodine gas.

Then 3.0 moles of hydrogen gas reacts with 3.0 mol of iodine gas. But there are 2.0 moles of iodine gas. Hence,Iodine is a limiting reagent. The production of HI will depend upon iodine gas moles.

According to reaction , 1 mol of iodine gas gives 2 moles of HI.

Then 2 moles of iodine gas will give:

$\frac{2}{1}\times 2 mol=2 mol$ of HI

Theoretically we will get 4 moles of HI.

Theoretical yield of HI = 4 mol × 128 g/mol= 512 g

Experimental yield of HI = 1.0 mol

= 1 mol × 128 g/mol= 128 g

$\%yield=\frac{\text{Experimental yield}}{\text{Theoretical yield}} \times 100$

$\%yield=\frac{128 g}{512 g}\times 100=25\%$

The percent yield for this reaction is 25%.

6 0

3 years ago

. If 69.15% exists as 63Cu with an atomic mass of 62.92, then what is the atomic mass of the second isotope?

Alexeev081 [22]

Answer: 64.8

Explanation:Please see attachment for explanation

8 0

3 years ago

Match each chemical with the correct use.

Fittoniya [83]

1. x-ray soft tissue organs - barium

2. reduce pain and fever- acetylsalicylic acid

3. anesthetic- nitrous oxide

4. treat acne - A. benzoyl peroxide

7 0

3 years ago