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3 years ago

What would be the mass of 4.56x10²³ water molecules

1 answer:

3 0

Every time you see molecules, atoms, & particles think of avagadros #. (6.022 x 10^23)

Answer: 13.6 grams of H2O

Solution: (4.56x10^23) x (1 mol H2O/6.022x10^23) x (18 grams H2O/1 mol H2O) = 13.6 grams of H2O

Using dimensional analysis above makes these types of problems easy.

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A gas occupies a volume of 202 ml at a pressure of 505 torr. To what pressure must the gas be subject in order to change the vol

UNO [17]

Answer:

1569 torr

Explanation:

Assuming ideal behaviour and constant temperature, we can solve this problem by using <em>Boyle's law</em>, which states:

V₁P₁ = V₂P₂

Where in this case:

V₁ = 202 mL

P₁ = 505 torr

V₂ = 65.0 mL

P₂ = ?

We <u>input the data given by the problem</u>:

202 mL * 505 torr = 65.0 mL * P₂

And <u>solve for P₂</u>:

P₂ = 1569 torr

6 0

3 years ago

A saturated solution of Al(OH)3 has a molar solubility of2.9x J0-9 Mat a certain temperature. What is the solubility product con

Viktor [21]

The solubility product constant, Ksp, of the aluminum hydroxide, Al(OH)₃ at the temperature is 1.91×10¯³⁹

<h3>What is solubility of product? </h3>

The solubility of product (Ksp) is defined as the concentration of products raised to their coefficient coefficients. This is illustrated below:

mA <=> nC + eD

Ksp = [C]^n × [D]^e

With the above information in mind, we can obtain the solubility of the product. This is illustrated below:

<h3>Dissociation equation </h3>

Al(OH)₃(aq) → Al³⁺(aq) + 3OH¯(aq)

From the balanced equation above,

1 mole of Al(OH)₃ contains 1 mole of Al³⁺ and 3 moles of OH¯

<h3>How to determine the concentration of Al³⁺ and OH¯</h3>

From the balanced equation above,

1 mole of Al(OH)₃ contains 1 mole of Al³⁺ and 3 moles of OH¯

Therefore,

2.9×10¯⁹ M Al(OH)₃ will also contain

1 × 2.9×10¯⁹ = 2.9×10¯⁹ M Al³⁺
3 × 2.9×10¯⁹ = 8.7×10¯⁹ M OH¯

<h3>How to determine the solubility of product </h3>

Concentration of Al³⁺ = 2.9×10¯⁹ M

Concentration of OH¯ = 8.7×10¯⁹ M

Solubility product (Ksp) =?

Al(OH)₃(aq) → Al³⁺(aq) + 3OH¯(aq)

Ksp = [Al³⁺] × [OH¯]³

Ksp = 2.9×10¯⁹ × (8.7×10¯⁹)³

Ksp = 1.91×10¯³⁹

Learn more about solubility of product:

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5 0

3 years ago

PSYCHOLOGYWhen one individual perceives the events of a car crash to be different than another person, which of the following wi

Sergeeva-Olga [200]

Answer:

the answer is c

Explanation:

8 0

4 years ago

Read 2 more answers

Which scientist discovered that other galaxies and stars were moving away from us at speeds proportional to how far they were aw

julsineya [31]

I think it was edwin hubble but I'm not sure

7 0

3 years ago

The radius of a strontium atom is 215 pm. How many strontium atoms would have to be laid side by side to span a distance of 4.19

Solnce55 [7]

Answer:

0.97 × 10⁹ strontium atoms

Explanation:

if 1 pm is equal with 10⁻⁹ mm

then 215 pm are equal to X mm

X = (215 × 10⁻⁹) / 1 = 215 × 10⁻⁹ mm

Now the diameter of the strontium atom is twice the radius:

diameter = 215 × 10⁻⁹ × 2 = 430 × 10⁻⁹ mm

if 1 strontium atom have a diameter of 430 × 10⁻⁹ mm

then X strontium atom are needed to be laid said by side to span a distance of 419 mm

X = (419 × 1) / (430 × 10⁻⁹) mm = 0.97 × 10⁹ strontium atoms

8 0

3 years ago