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Ugo [173]
3 years ago
9

What would photocaption that compares to a water ecosystem

Chemistry
1 answer:
nalin [4]3 years ago
7 0

Answer:

it is B

Explanation:

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Narceine is a narcotic in opium that crystallizes from solution as a hydrate that contains 10.8 mass % water and has a molar mas
Leto [7]

Thewater of hydration x in narceine. xH₂O is 3

<h3>What is Water of Hydration?</h3>
  • In chemistry, water molecules found inside crystals are referred to as "water of crystallization" or "water of hydration." When crystals are formed from aqueous solutions, water is frequently included.
  • The entire mass of water in a substance at a specific temperature is sometimes referred to as water of hydration, and it is typically present in a stoichiometric ratio.
  • The term "water of crystallization" has historically been used to describe water that is not physically linked to the metal cation but is present in the crystalline structure of a metal complex or salt.
  • Many chemicals include water molecules in their crystalline structures when they crystallize from water or solvents that contain water. Heating a sample usually removes the water of crystallization, but the crystalline qualities are frequently lost.

Given that hydrate is 10.8% by mass

molar mass = 499.52 g/mol

calculating the amount of water

mass of water = \dfrac{10.8 \times 499.5}{100}

mass of water = 53.95 g

moles of water = \dfrac{mass}{molar mass}

moles of water = \dfrac{53.95}{18} = 3

then the water of hydration x in narceine. xH₂O is 3

To learn more about water of hydration with the given link brainly.com/question/4355575

#SPJ4

7 0
1 year ago
A cold pack is snapped, and the chemical reaction causes the pack to feel cold. Which kind of reaction is this
pogonyaev
Endothermic, as it makes its surroundings cooler.
3 0
3 years ago
Write symbol without electron dots, for the ion formed when selenium gains two electrons.
olganol [36]

Here we have to get the symbol of the selenium ion having two extra electrons.

The symbol of the selenium ion with two extra electrons is Se^{2-}.

The number of electrons present in selenium is 34. The electronic configuration of selenium (Se) is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁴.

Now we can see that there are 4 electrons in p-orbital. The p-orbital can take maximum 6 electrons thus there is two vacant space in 4p orbital for selenium. If we add two electrons then the total number of electrons will be 36. The electronic configuration can be written as:

[Se²⁻] =  1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶.

The two negative charge on selenium makes it an anion as one electron always posses one unit negative charge. Thus for the incorporation of the two electrons there will be accumulation of two negative charge on the selenium atom and it will be  expressed as Se²⁻.

5 0
3 years ago
If the hydrogen ion concentration [H+] in a solution is 1.87 x 10^-11M what is the [OH-]
mixer [17]

Answer:

5.35 * 10^-4M

Explanation:

8 0
3 years ago
PLEASE HELP WILL MARK AS BRAINEST!!!!!!!!!!!!
Elanso [62]

The answers to your question is B hope this helps.

5 0
3 years ago
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