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LuckyWell [14K]
2 years ago
11

What is the empirical formula for a substance if a 201.6 g sample of it contains 54.0 grams of nitrogen, 15.0 grams of hydrogen,

and 132.6 grams of chlorine
Chemistry
1 answer:
jeyben [28]2 years ago
6 0

The empirical formula of the substance would be  NH_4Cl

<h3>Empirical formula calculation</h3>

The constituents of the compound are as follows:

N = 54/201.6 = 26.78% = 26.78/14 = 1.91 moles

H = 15/201.6 = 7.44% = 7.44/1 = 7.44 moles

Cl = 132.6/201.6 = 65.48% = 65.48/35.5 = 1.84 moles

Divide the number of moles by the smallest"

N = 1.91/1.84 = 1

H = 7.44/1.84 = 4

Cl = 1.84/1.84 = 1

Thus, the empirical formula is NH_4Cl

More on empirical formula can be found here: brainly.com/question/14044066

#SPJ1

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When chlorine is added to acetylene, 1, 1, 2, 2-tetrachloroethane is formed: 2cl2 (g) + c2h2 (g) → c2h4cl4 (l) how many liters o
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The reaction is as follow,

                                   H₂C₂  +  2 Cl₂     →      H₂C₂Cl₄

According to equation,

       167.84 g (1 mole) H₂C₂Cl₄ is produced by  =  44.8 L (2 mole) of Cl₂
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For most solids at room temperature, the specific heat is determined by oscillations of the atom cores in the lattice (each osci
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Explanation:

From the question we are told that

The amount of energy contributed by each oscillating lattice site  is  E =3 kT

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        The atomic mass of aluminum is  m_a = 27.0g/mol

        The specific heat of aluminum is  c_a = 900 J/kg-K

 The objective of this solution is to obtain the specific heat of copper

       Now specific heat can be  defined as the heat required to raise the temperature of  1 kg of a substance by  1 ^o K

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                    C = \frac{dU}{dT}

Where dT is the change in temperature

             dU is the change in internal energy

The internal energy is mathematically evaluated as

                       U = 3nk_BT

      Where  k_B is the Boltzmann constant with a value of 1.38*10^{-23} kg \cdot m^2 /s^2 \cdot ^o K

                    T is the room temperature

                      n is the number of atoms in a substance

Generally number of  atoms in mass of an element can be obtained using the mathematical operation

                      n = \frac{m}{M}  * N_A

Where N_A is the Avogadro's number with a constant value of  6.022*10^{23} /  mol

          M is the atomic mass of the element

           m actual mass of the element

  So the number of atoms in 1 kg of copper is evaluated as  

             m = 1 kg = 1 kg *  \frac{10000 g}{1kg }  = 1000g

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                          = 9.46*10^{24} \ atoms

Now substituting the equation for internal energy into the equation for specific heat

          C = \frac{d}{dT} (3 n k_B T)

              =3nk_B

Substituting values

         C = 3 (9.46*10^{24} )(1.38 *10^{-23})

            C= 392 J/kg\cdot ^o K

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