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sp2606 [1]
3 years ago
9

What is the molarity of the solution with respect to NaCL

Chemistry
1 answer:
dezoksy [38]3 years ago
6 0
7.0 g in 220 ml corresponds to 7 x 1000/220 = 31.818g per 1000 cc of solution or 1 liter of solution

Molarity is moles per liter of solution by definition, so we need to know the number of moles of NaCl in 31.818 grams. The molar mass of NaCl is 58.5 grams(rounded off), so # moles = 31.818/58.5 = 0.543. 0.543 moles in a liter of solution defines the concentration as 0.543M
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Iron metal reacts with elemental oxygen to form rust according to the unbalanced reaction, Fe(s) + O2(g) → Fe2O3(s),. What is th
pochemuha

Answer:

c. 3

Explanation:

The unbalanced reaction expression is given as:

          Fe  +  O₂  →   Fe₂O₃  

To balance the expression gives the coefficient of oxygen.

Assign the coefficients a,b, c and use a mathematical approach to solve this problem:

             aFe  +  bO₂  →  cFe₂O₃

Conserving Fe: a  = 2c

                    O:  2b  = 3c

Now let c = 1, a  = 2, b  = \frac{3}{2}

  Multiply through by 2,

             a = 4, b = 3 and c  = 2

 

               4Fe  +  3O₂  →   2Fe₂O₃  

The coefficient of O₂ is 3

3 0
3 years ago
A sample of krypton gas collected at a pressure of 1.31 atm and a temperature of 26.0°C is found to occupy a volume of 23.3 lite
djyliett [7]

Mol of Kr gas = 1.244

<h3>Further explanation</h3>

In general, the gas equation can be written  

<h3> PV=nRT </h3>

where  

P = pressure, atm  

V = volume, liter  

n = number of moles  

R = gas constant = 0.08205 L.atm / mol K  

T = temperature, Kelvin  

P=1.31 atm

V=23.3 L

T=26+273=299 K

mol of sample :

\tt n=\dfrac{PV}{RT}=\dfrac{1.31\times 23.3}{0.08205\times 299}=1.244

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Continental drift causes tectonic plates to either "pull apart" or "crash" into each other.

Plates that crash into each other either form mountains, or when one slides under the other (a subduction zone) volcanoes from.
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What at the three different variables in density?
tatyana61 [14]

Answer:Independent, dependent, and controlled variables.

Explanation:

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Which of the following shows correctly an ion pair and ionic compound the two ions from
zubka84 [21]

Answer:

what are the choices?

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