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Leya [2.2K]
3 years ago
6

Can someone help me with this question please

Chemistry
1 answer:
laila [671]3 years ago
4 0
PH=3

pH=-lg[H₃O⁺]

[H₃O⁺]=10^(-pH)

[H₃O⁺]=10⁻³=0.001 M

A) 0.001 M
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In May 2016, William Trubridge broke the world record in free diving (diving underwater without the use of supplemental oxygen)
Brrunno [24]

Answer:

The volume that this same amount of air will occupy in his lungs when he reaches a depth of 124 m is - 0.27 L.

Explanation:

Using Boyle's law  

{P_1}\times {V_1}={P_2}\times {V_2}

Given ,  

V₁ = 3.6 L  

V₂ = ?

P₁ = 1.0 atm

P₂ = 13.3 atm

Using above equation as:

{P_1}\times {V_1}={P_2}\times {V_2}

{1.0\ atm}\times {3.6\ L}={13.3\ atm}\times {V_2}

{V_2}=\frac{{1.0}\times {3.6}}{13.3}\ L

{V_2}=0.27\ L

<u>The volume that this same amount of air will occupy in his lungs when he reaches a depth of 124 m is - 0.27 L.</u>

8 0
3 years ago
Explain how to calculate the density of a regular shaped object such as a rectangular box.
belka [17]

The density of a regular shaped object such as a rectangular box is calculated as thus:

The amount of matter is its mass, and the space it takes up is its volume.

So therefore, to calculate the density of an object such as the a regular shaped one like a rectangular box;

Its density = mass / volume.

<h3>Derived quantities</h3>

These are physical quantities which are obtained from fundamental quantities. I'm order words, derived quantities are quantities which are obtained from the combination of of fundamental quantities either by addition, division or multiplication

Some few examples of derived quantities are as follows:

Density

  • Velocity
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  • Volume
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So therefore, the density of a regular shaped object such as a rectangular box is calculated as thus:

The amount of matter is its mass, and the space it takes up is its volume.

So therefore, to calculate the density of an object such as the a regular shaped one like a rectangular box;

Its density = mass / volume.

Learn more about derived quantities:

brainly.com/question/28180944

#SPJ1

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A pure substance which contains components connected by chemical bonds?"
anygoal [31]

Answer:

Gold, Water

Explanation:

which their molecules can not be broken down.

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3 years ago
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