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Sholpan [36]
3 years ago
5

How many moles of KCl would be dissolved in 4 L of water to make a 2 M solution?

Chemistry
1 answer:
Nataly [62]3 years ago
3 0
Answer:
             Moles  =  8 moles

Solution:
              Molarity is given as,

                         Molarity  =  Moles / Volume of Solution   ------ (1)

Data Given;
                   Molarity  =  2 M

                   Volume  =  4 L

Solving eq.1 for Moles,

                       Moles  =  Molarity × Volume of Solution

Putting values,

                       Moles  =  2 mol.L⁻¹ × 4 L

                       Moles  =  8 moles
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What kind of chemical reaction does the chemical equation sodium plus chlorine --> sodium chloride represent?
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Chemical reactions convert reactants to products, whose properties differ from those of the reactants. Chemical equations are a compact and convenient way to represent chemical reactions. They have the general form

Reactant(s) → Product(s)

The arrow in the equation means "changes to" or "forms." The reaction of gaseous nitrogen with hydrogen to produce ammonia, NH 3 , is represented by the chemical equation

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3 years ago
Copper has an atomic number of 29 and a mass number of 64. what would result if an uncharged copper atom lost two electrons?
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Uncharged copper after loosing two electrons is converted to Cu^{2+} which can be represented as follows:

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3 years ago
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Is mass conserved when 40 g of sodium hydroxide undergoes a chemical change during an interaction with 37g of hydrogen chloride?
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Answer:

Mass is conserverd

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What is the main cause of global conversation currents
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Consider the molecule BF3. (a) What is the electron config- uration of an isolated B atom? (b) What is the electron con- figurat
anzhelika [568]

For the given molecule, we are asked to give-

  1. The electron configuration of an isolated B atom
  2. The electron configuration of an isolated F atom
  3. Hybrid orbitals should be constructed on the B atom to make the B–F bonds in Boron tri flouride
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as atomic number of B is 5

electronic configuration will be [He] 2s² 2p¹

  • The electron configuration of an isolated F atom:

as atomic number of F is 9

electronic configuration will be  [He] 2s² 2p5

  • Hybrid orbitals should be constructed on the B atom to make the B–F bonds in Boron tri flouride will be sp2.

as the one s and two of p orbital from the valance shell will hybridised to make 3 hybrid orbital of B resulting in 3 B-F bonds.

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11 months ago
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