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Oksanka [162]
2 years ago
15

Hello comets~help me with these questions ​

Chemistry
2 answers:
Mrrafil [7]2 years ago
8 0

Answer:

Explanation:

3.

Brine is a concentrated solution of sodium chloride. Strictly speaking, sodium chloride does not exist in the solution as it completely dissociates into Na+ and Cl- in water.

Other ions that may exit include Potassium (K+), Magnesium (Mg++), Calcium (Ca++), Bromide (Br-), Iodide (I-)

4.

The only halide of Beryllium that is ionic is BeF2 while other halides like BeCl2, BeBr2 and BeI2 are highly covalent.

Beryllium halides are mostly covalent due to smaller size and relatively high charge on Be+2 ion.

Another fun fact about Beryllium Floride is that it exists as a glass in solid state, with four-coordinate Be(2+) tetrahedral centers and two-coordinate fluoride centers.

Vadim26 [7]2 years ago
4 0

Impurities of brine solution

  • calcium chloride
  • calcium sulphate
  • magnesium chloride
  • sodium sulphate

Characteristics of halides of beryllium

  • covalent bond
  • does not conduct electricity
  • In organic solvents, it is soluble.

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potassium and chlorine react to form potassium chloride. a.it is a redox reaction,explain why. b.see if u can write a balanced e
Elan Coil [88]

Answer:

<em>K</em><em>+</em><em>Cl</em><em /><em>KCl</em>

Explanation:

because the reaction is between metal Potassium and Non-metal Chlorine

8 0
3 years ago
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What is the boiling point of 0.464 m lactose in water? (Kb of water = 0.512 oC/m). Enter your answer to 3 decimal places.
kirill [66]

Answer:

Boiling point for the solution is 100.237°C

Explanation:

We must apply colligative property of boiling point elevation

T° boiling solution - T° boiling pure solvent = Kb . m

m = molalilty (a given data)

Kb = Ebulloscopic constant (a given data)

We know that water boils at 100°C so let's replace the information in the formula.

T° boiling solution - 100°C = 0.512 °C/m . 0.464 m

T° boiliing solution = 0.512 °C/m . 0.464 m + 100°C → 100.237 °C

3 0
2 years ago
Balance this equation <br><br>Fe2O2 + C -&gt; Fe + CO2​
lidiya [134]

2 FeO + 1 C ===》2 Fe + 1 CO2

8 0
2 years ago
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Suppose you find a rock that contains some potassium-40 (half-life of 1.3 billion years). you measure the amount and determine t
Alborosie
Equation for Half life :
A = a(0.5)^(t/h)
A is current amount, "a" is initial amount, h is halflife, t is time

5 = 40(0.5)^(t/1.3x10^9)
5/40 = (0.5)^(t/1.3x10^9)
take the log of both sides , power rule
Log(5/40) = (t/1.3x10^9) * Log(0.5)
(1.3x10^9) * Log(5/40) / Log(0.5) = t
3.9x10^9 years = t

And if you think about what a half life is, the time it take for the amount to reduce to half.
40/2 = 20
20/2 = 10
10/2 = 5
It went through 3 half-lifes
3 * 1.3x10^9 = 3.9x10^9 years

7 0
2 years ago
The periodic table
astra-53 [7]

it's Lithium or Li

..............................

5 0
3 years ago
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