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lidiya [134]
3 years ago
10

Untitled Section

Chemistry
1 answer:
ipn [44]3 years ago
7 0

Answer:

B.

Explanation:

Hope this helps.

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Copper is a solid phase of copper still unknown to science. The only difference between it and ordinary copper is that Copper fo
Scrat [10]

Complete Question

The complete question is shown on the first uploaded image  

Answer:

The density is  \rho =  8.21479 g/cm^3

Explanation:

From the question we are told that

         the lattice constant is  a =  0.295 nm = 0.295*10^{-9} = 0.295*10^{-7} cm

The density of Copper (\beta) is mathematically represented as

     \rho  =  \frac{ZM}{a^3N_A}

Where  Z is the number of units in a unit cell and  for BCC crystals  Z =2

          M is the molar mass of copper which same for Copper with a value of  

           M =  63.5  g/mol

          N_A is the Avogadro's constant with a value of  N_A =  6.022*10^{23}

Substituting values

       \rho =  \frac{2 *63.5}{(0.295*10^{-7})^3 * (6.022*10^{23})}

      \rho =  8.21479 g/cm^3

       

8 0
3 years ago
If the initial concentration of SO2Cl2 is 0.125 M , what is the concentration of SO2Cl2 after 210 s ?
andre [41]

Complete question:

The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.44×10⁻⁴ s⁻¹ at a certain temperature.

If the initial concentration of SO2Cl2 is 0.125 M , what is the concentration of SO2Cl2 after 210 s ?

Answer:

After 210 s the concentration of SO2Cl2  will be 0.121 M

Explanation:

ln\frac{[A_t]}{[A_0]} =-kt

where;

At is the concentration of A at a time t

A₀ is the initial concentration of A

k is rate constant = 1.44×10⁻⁴ s⁻¹

t is time

ln(At/A₀) = -( 1.44×10⁻⁴)t

ln(At/0.125) =  -( 1.44×10⁻⁴)210

ln(At/0.125) = -0.03024

\frac{A_t}{0.125} = e^{-0.03024

At/0.125 = 0.9702

At = 0.125*0.9702

At = 0.121 M

Therefore, after 210 s the concentration of SO2Cl2  will be 0.121 M

6 0
3 years ago
An ionic bond occurs between what particles?
DerKrebs [107]

Answer:

A positive and a negative ion.

Explanation:

5 0
3 years ago
Read 2 more answers
Explain why most cells must be microscopic (so small they must be viewed with a microscope) in order to maintain life properly.
Y_Kistochka [10]

Answer:

if the cell grows beyond a certain limit, not enough material  will be able to cross the membrane fast enough to sustain the increased cellular volume

3 0
3 years ago
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There are no forces of ____ or ____ between gas particles
mojhsa [17]

The given blanks can be filled with attraction and repulsion.  

Gases comprise tiny particles of matter, which are in spontaneous motion. The particles of a gas are colliding continuously with each other and with the container walls. These collisions are considered elastic, that is, no net loss of energy takes place due to collisions. The particles of gases are distinct away from each other by large distances.  

There are no interactive forces, that is, repulsion or attraction among the gas particles. The average kinetic energy of gas particles depends upon the temperature of the gas.  


7 0
3 years ago
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