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4 years ago

Making anyone branliest who answers correct and super fast

Chemistry

1 answer:

Tpy6a [65]4 years ago

3 0

F is mitochondria and i think D is cytoplasm

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The three common states of matter are solid,liquid, and gas. how are they the same? how are they different?

Alina [70]

They are different beacause of the stages some you can see and not. And the cells move at different paces

8 0

4 years ago

An electrochemical cell is constructed using electrodes with the following half-cell reactions.

marshall27 [118]

Answer:

E cell = +1.95 V

Explanation:

At Anode : Oxidation reaction takes place

At Cathode : Reduction reaction takes place

The reaction with lower value of reduction potential will undergo Oxidation

$Mn^{2+}(aq)+2e^{-}\rightarrow Mn(s)$ E = -1.18 V

This equation undergo oxidation reaction and become:

Anode(Oxidation-Half) :

$Mn(s)\rightarrow Mn^{2+}(aq)+2e^{-}$ E = +1.18 V

Cathode(Reduction-Half) :

$Fe^{3+}(aq)+e^{-}\rightarrow Fe^{2+}$ E =+0.77 V

To balance the reaction multiply reduction-Half with 2.We get :

$Fe^{3+} +2Mn(s)+\rightarrow Fe^{2+} + 2Mn^{2+}$

Note that E is intensive property , do not multiply E of oxidation-half with 2

Ecell = 0.77 -(-1.18)

E = +1.95 V

3 0

3 years ago

The acidic ingredient in vinegar is acetic acid. The pH of vinegar is around 2.4, and the molar concentration of acetic acid in

IrinaK [193]

Answer: The value of acid ionization constant $K_a$ for acetic acid is $1.87\times 10^{-5}$

Explanation:

$CH_3COOH\rightarrow H^+CH_3COO^-$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= 0.85 M and $pH$ = 2.4

$pH=-log[H^+]$

$[H^=}=c\times \alpha=10^{-2.4}=3.98\times 10^{-3}$

$K_a=?$

Putting in the values we get:

$K_a=\frac{(3.98\times 10^{-3})^2}{(0.85-3.98\times 10^{-3})}=1.87\times 10^{-5}$

Thus the value of acid ionization constant $K_a$ for acetic acid is $1.87\times 10^{-5}$

5 0

3 years ago

Which atoms in the table are the same element and with what reasoning?

fenix001 [56]

The atoms that are the same element are atoms 1 and 2, because they have the same number of protons (option D).

<h3>What is an element?</h3>

Element is one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons.

The atoms of an element have the same number of protons, which is the atomic number.

According to the table given above, three atoms and their respective proton, electron and neutron number are given.

It can be said that atoms 1 and 2 are of the same element, because they have the same number of protons.

Learn more about elements at:

#SPJ1

5 0

1 year ago

What did you learn in chemistry?

snow_tiger [21]

How to handle stress

4 0

3 years ago