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Aleonysh [2.5K]
3 years ago
5

> Ha

Chemistry
1 answer:
kodGreya [7K]3 years ago
5 0

Answer:

7.5 hours

Explanation:

half life is the a period of time the sample takes to be half the amount it started the period with

it means we can express it as

original amount / (2^n) = current amount

where n is the number of periods

in the problem if we put 100 / (2^n) = 6.25

we will find that n = 4

we divide 30 over 4 and we get that half life of each period will be equal to 7.5

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Write the cell notation for an electrochemical cell consisting of an anode where Mn (s) is oxidized to Mn2 (aq) and a cathode wh
morpeh [17]

Answer:

Mn(s)/Mn^2+(aq)//Co^2+(aq)/Co(s)

Explanation:

In writing the cell notation for an electrochemical cell, the anode is written on the left hand side while the cathode is written on the right hand side. The two half cells are separated by two thick lines which represents the salt bridge.

For the cell discussed in the question; the Mn(s)/Mn^2+(aq) is the anode while the Co^2+(aq)/Co(s) half cell is the cathode.

Hence I can write; Mn(s)/Mn^2+(aq)//Co^2+(aq)/Co(s)

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What is the land like where mesosaurus fossils are found?
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Black_prince [1.1K]

Answer:

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Explanation:

7 0
3 years ago
The number of hydrogen atoms in 0.050 mol of c3h8o3 is
Natalka [10]

Answer:

            2.40 × 10²³ Atoms of Hydrogen

Solution:

The number of hydrogen atoms in C₃H₈O₃ are calculated as;

As, there are eight hydrogen atoms per molecule of C₃H₈O₃, therefore the number of hydrogen atoms per mole of C₃H₈O₃ are calculated as;

            1 mole C₃H₈O₃ contains  =  6.022 × 10²³ Molecules of C₃H₈O₃

So,

       0.05 mole C₃H₈O₃ will contain  =  X Molecules of C₃H₈O₃

Solving for X,

                     X  =  (0.05 × 6.022 × 10²³) ÷ 1

                     X =  3.011 × 10²² Molecules of C₃H₈O₃

As,

            1 Molecule of C₃H₈O₃ contains  =  8 Atoms of Hydrogen

So,

3.011 × 10²² Molecules of C₃H₈O₃ will contain  =  X Atoms of Hydrogen

Solving for X,

                     X =  (3.011 × 10²² × 8) ÷ 1

                     X  =  2.40 × 10²³ Atoms of Hydrogen


6 0
3 years ago
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