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2 years ago

Which of the following best defines balanced forces?

Chemistry

2 answers:

Sauron [17]2 years ago

7 0

Answer:

<h3>Discuss about Library Automation Life cycle</h3>

Explanation:

Mars2501 [29]2 years ago

6 0

Answer:

Balanced forces are forces that act in opposite directions and cancel each other out

let me know if you have any other questions

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Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the equilibri

lorasvet [3.4K]

Explanation:

The reaction equation will be as follows.

$CO_{2}(aq) + H_{2}O \rightleftharpoons H^{+}(aq) + HCO^{-}_{3}(aq)$

Calculate the amount of $CO_{2}$ dissolved as follows.

$CO_{2}(aq) = K_{CO_{2}} \times P_{CO_{2}}$

It is given that $K_{CO_{2}}$ = 0.032 M/atm and $P_{CO_{2}}$ = $1.9 \times 10^{-4}$ atm.

Hence, $[CO_{2}]$ will be calculated as follows.

$[CO_{2}]$ = $K_{CO_{2}} \times P_{CO_{2}}$

= $0.032 M/atm \times 1.9 \times 10^{-4}atm$

= $0.0608 \times 10^{-4}$

or, = $0.608 \times 10^{-5}$

It is given that $K_{a} = 4.46 \times 10^{-7}$

As, $K_{a} = \frac{[H^{+}]^{2}}{[CO_{2}]}$

$4.46 \times 10^{-7} = \frac{[H^{+}]^{2}}{0.608 \times 10^{-5}}$

$[H^{+}]^{2}$ = $2.71 \times 10^{-12}$

$[H^{+}]$ = $1.64 \times 10^{-6}$

Since, we know that pH = $-log [H^{+}]$

So, pH = $-log (1.64 \times 10^{-6})$

= 5.7

Therefore, we can conclude that pH of water in equilibrium with the atmosphere is 5.7.

3 0

3 years ago

The figure above shows the basic concepts of cell division

Cerrena [4.2K]

A. DNA is copied.
- The cell duplicates its DNA in order to have a complete set in eac cell when it divides.

6 0

3 years ago

Va rog ! urgent! E pt chimie

n200080 [17]

Answer:

An element

It stays shiny

Explanation:

Pure Gold is an element.

An element is a distinct substance that cannot be split-up into simpler substances. Such substances consists of only one kind of atom.

There are over a hundred elements known to date.

As an element, Gold is classified as a metal due to its very unique set of properties.

One of the indicator that gold does not react with oxygen is that it stays shiny. It does not give rusty look when exposed to air.

Substances that combines with oxygen have a rusty look or change appearance when expose to air. For example, iron.

5 0

3 years ago

What is the pH of a solution with a concentration of 5.2 x 10-8

BartSMP [9]

Answer:

7.28

Explanation:

-log(5.2x10^-8) = 7.28

- Hope that helped! Please let me know if you need further explanation.

5 0

3 years ago

There are two common isotopes of the element lithium. The first isotope has 3 protons and 3 neutrons. The second isotope has 3 p

lions [1.4K]

Hey there!

In hyphenated notation, we have the name of the element, a hyphen, then a number that is the sum of protons and neutrons.

The first isotope has 3 protons and 3 neutrons, so the sum is 6. Its name is lithium-6.

The second isotope has 3 protons and 4 neutrons, so the sum is 7. Its name is lithium-7.

Hope this helps!

4 0

3 years ago