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Tanzania [10]
3 years ago
5

What class of organism is vital in the recycling of nutrients in the ecosystem?

Chemistry
1 answer:
asambeis [7]3 years ago
6 0
I believe that would be a decomposer
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What is the molarity of a solution in which 175.8<br> grams of NaCl is dissolved in 1.5 L of water?
Sophie [7]
175.8 g NaCl to moles:
(175.8 g)/(58.44 g/mol) = 3.008 mol NaCl

Molarity = moles of solute/volume of solution in liters

(3.008 mol NaCl)/(1.5 L) = 2.0 M.

The molarity of this solution would be 2.0 M.
8 0
2 years ago
The pre-exponential constant and activation energy for the diffusion of iron in cobalt are 1.7 x 10-5 m2/s and 273,300 J/mol, re
Kitty [74]

<u>Answer:</u> The temperature of the system will be 1622 K

<u>Explanation:</u>

The equation relating the pre-exponential factor and activation energy follows:

\log D=\log D_o-\frac{E_a}{2.303RT}

where,

D = diffusion coefficient = 2.7\times 10^{-14}m^2/s

D_o = pre-exponential constant = 1.7\times 10^{-5}m^2/s

E_a = activation energy of iron in cobalt = 273,300 J/mol

R = Gas constant = 8.314 J/mol.K

T = temperature = ?

Putting values in above equation, we get:

\log (2.7\times 10^{-14})=\log (1.7\times 10^{-5})-\frac{273,300}{2.303\times 8.314\times T}\\\\T=1622K

Hence, the temperature of the system will be 1622 K

8 0
3 years ago
List examples of organisms from the movie that represent each of the six kingdoms. Monera (Archaebacteria/Eubacteria): Protista:
miv72 [106K]

Answer:

Animalia: Nemo

Plantae: coral

Fungi: algae

Your on your own for the rest ‍♀️

8 0
3 years ago
Read 2 more answers
The elements cu, o, la, y, ba, tl, and bi are all found in high-temperature ceramic superconductors. write the expected electron
timama [110]
Part 1)
Cu- <span>[Ar] 3d¹⁰4s¹     </span><span>atomic number: 29
</span>
<span>O-  [He] 2s2 2p<span>4     atomic number:8

</span></span>La- <span>[Xe] 5d¹ 6s²      </span><span>atomic number:57

Y-   </span><span>[Kr] 4d¹5s²      </span><span>atomic number:39
 
Ba- </span><span>[Xe] 6s²      </span><span>atomic number:56

Tl-  </span><span>[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹   </span><span>atomic number:81

Bi- </span> <span>[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³ </span>atomic number:83

Part 2)
You are able to this by consulting the periodic table and following this steps:
-Find your atom's atomic number;
<span>-Determine the charge of the atom (these were all uncharged)
</span><span>-Memorize the order of orbitals (s, d, p, d.. and how many electrons they can fit)
</span>-<span>Fill in the orbitals according to the number of electrons in the atom
- </span><span>for long electron configurations, abbreviate with the noble gases</span>




4 0
3 years ago
A student finds a gold nugget while hiking in the forest. He is not sure if it is pure gold.
Varvara68 [4.7K]

Answer:

Melting point and density

6 0
3 years ago
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