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Luba_88
12 days ago
10

How many moles of ions are in 285 ml of 0.0150 m mgcl2?

Chemistry
2 answers:
Tems11 [2.4K]12 days ago
7 0
MgCl₂)= Mg²⁺ + 2Cl⁻
V(MgCl₂)=285cm³=0,285dm³
c(MgCl₂)=0,015 mol/dm³
n(MgCl₂)=c·V= 0,015 mol/dm³ · 0,285dm³ = 0,0042 mol
n(Mg²⁺)=n(MgCl₂)=0,0042 mol
n(Cl⁻)=2n(MgCl₂)=0,0084 mol
lions [2.6K]12 days ago
3 0
The quantities of Mg^{2+} and Cl^- ions consist of 0.00428 and 0.00856 moles, respectively. Explanation: Molarity is defined as the number of moles of solute in one liter of a solution. In this context, the solute in question is MgCl_2. Given data includes: Volume of the solution = 285 mL = 0.285 L (as 1 L = 1000 mL); Molarity = 0.0150 M. Utilizing the provided values in our formula yields: The moles of MgCl_2 is calculated to be 0.00428 moles. According to stoichiometric relationships, 1 mole of MgCl_2 separates into 1 mole of Mg^{2+} ions and 2 moles of Cl^- ions. Therefore, the mole quantities are: Moles of Mg^{2+} = 0.00428 and Moles of Cl^- = 2 × 0.00428 = 0.00856. Thus, the respective mole amounts for Mg^{2+} and Cl^- ions are 0.00428 and 0.00856.
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The atomic radius of magnesium is 150 pm. The atomic radius of strontium is 200 pm. What is the atomic radius of calcium
castortr0y [2743]

Answer:

Calcium's atomic radius is roughly 175 pm.

Explanation:

We know that magnesium has an atomic radius of 150 pm.

The atomic radius of strontium measures 200 pm.

Since calcium's position is between magnesium and strontium in group 2 of the periodic table, its atomic radius should be roughly averaged between magnesium's and strontium's atomic radii because atomic radius is not constant.

Thus;

Calcium's atomic radius is approximately calculated as follows;

The average atomic radius is (200 + 150)/2 = 175 pm.

7 0
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A chemist is studying the following reaction: NO + NO2 ⇌ N2O3. She places a mixture of NO and NO2 in a sealed container and meas
castortr0y [2743]

Answer:

The forward reaction will keep occurring until all NO or all NO₂ is consumed.

Clarification:

  • According to Le Châtelier's principle, when a system at equilibrium experiences a disturbance from an outside source, the system will adjust to counteract this disturbance and restore equilibrium.

  • Thus, removing the product (N₂O₃) from the system effectively lowers the product concentration, prompting the reaction to shift forward and generate additional product in order to alleviate the strain caused by the removal of N₂O₃.

  • Consequently, the reaction will proceed forward until all of either NO or NO₂ is depleted.

5 0
1 month ago
The ionic radius of a sodium ion is 2.27 angstroms (A) . What is this length in um
lions [2653]

\boxed{\sf 1Å=10^{-10}m}

\\ \rm\longmapsto 2.27Å

\\ \rm\longmapsto 2.27\times 10^{-10}m

\\ \rm\longmapsto 0.227\times 10^{-9}m

\\ \rm\longmapsto 0.0227\times 10^{-8}m

\\ \rm\longmapsto 0.00227\times 10^{-7}m

\\ \rm\longmapsto 0.00023\times 10^{-6}m

\\ \rm\longmapsto 0.00023\mu m

6 0
1 month ago
Which statement is correct? Salts are formed by the reaction of bases with water. Most salts are ionic and are soluble in water.
lorasvet [2542]
<span>Salts result from the reaction between bases and water. - FALSE
</span><span>Most salts are ionic and dissolve in water. - TRUE
</span><span>Most salts are not dissolved in water and do not have electrical charges. - FALSE
</span><span>Solutions containing salt and water are unable to conduct electricity. - FALSE

:)</span>
3 0
1 month ago
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castortr0y [2743]

Answer:

B) Hyperbolic curve; substrate saturation

Explanation:

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