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Yuki888 [10]
4 years ago
10

Identifying Relationships A population of rabbits evolves thicker fur in

Chemistry
1 answer:
nekit [7.7K]4 years ago
6 0
Yes! rabbits altered their development to be better accustomed to their habitat!
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Two elements in the second transition series (Y through
ziro4ka [17]

Answer:

Technetium and Rhodium

Explanation:

For Technetium, Symbol: Tc

Atomic number: 43

Electron configuration: [Kr] 4d55s2

Atomic mass: 98 u

For Rhodium, Symbol: Rh

Electron configuration: [Kr] 4d85s1

Atomic number: 45

Atomic mass: 102.9055 u

4 0
4 years ago
Read 2 more answers
What is a molecule that includes the element oxygen?
Morgarella [4.7K]
O' is the molecule that is associated with oxygen and hydrogen
6 0
4 years ago
Read 2 more answers
What is the pOH of 0.50 molar H3BO3?
Crazy boy [7]

<u>Answer:</u>

<em>A. 10.25</em>

<em></em>

<u>Explanation:</u>

Pkb =4.77

So pka = 14 - pka = 9.23

Ka =10^{-pka}

H_3 BO_3 (aq)+ H_2 O(l) H_2 BO_3^- (aq)+H_3 O^+ (aq)

Initial                0.50M                                 0                                 0

Change                  -x                                 +x                               +x

Equilibrium    0.50M-x                               +x                               +x

Ka =\frac {((x)(x))}{(0.50M-x)}

5.88\times10^{-10}= \frac {x^2}{(0.50M-x)}

(-x is neglected) so we get

5.88\times10^{-10}\times0.50=x^2\\\\x^2=2.94\times10^{-10}

x=\sqrt{x^2}=1.72\times10^{-5} M=H^3 O^{+}

pH=-log[H^3 O^+]\\\\pH=-log[1.72\times10^{-5}]\\\\pH=4.76

pOH = 14 - pH

= 14 - 4.76

pOH = 9.24 is the answer

Option A - 10.25 is the answer which is close to 9.24

4 0
3 years ago
What is the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules?
krek1111 [17]
1 mole of CO2 has 6.02 x 10^23 molecules of CO2. Say x moles of CO2 has 3.0x10^23 molecules of CO2. Therefore x = 3/6.02 = 0.50. M = 0.50 * (12 + 2x16) = 0.50 * 44 = 22g
5 0
3 years ago
Explain the electrolysis of acidified water​
Andrew [12]

Answer:

yqaeh

Explanation:

Electrolysis of acidified water

Water is a poor conductor of electricity, but it does contain some hydrogen ions , H +, and hydroxide ions, OH -. These ions are formed when a small proportion of water molecules naturally dissociate . ... H + ions are attracted to the cathode , gain electrons and form hydrogen gas.

8 0
3 years ago
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