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Len [333]
3 years ago
11

Why must a chemistry experiments performed in a well ventilated room?

Chemistry
1 answer:
Elina [12.6K]3 years ago
4 0
The best answer would be because there might be an accident.
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Calculate the hydronium ion, [ H30+], and hydroxide ion, [OH-], concentrations for a
mixer [17]

Answer:

[H3O+] = 0.0117 M

[OH-] = 8.5 * 10^-13 M

Explanation:

Step 1: Data given

Concentration of HCl = 0.0117 M

Step 2:

HCl is a strong acid

pH of a strong acid = -log[H+] = - log[H3O+]

[H3O+] = 0.0117 M

pH = -log(0.0117)

pH = 1.93

pOH =14 - 1.93 = 12.07

pOH = -log[OH+] = 12.07

[OH-] = 10^-12.07 = 8.5 * 10^-13

Or

Kw / [H3O+] = [ OH-]

10^-14 / 0.0117 = 8.5*10^-13

4 0
3 years ago
One of the negative aspects of using nuclear power as an alternative energy source is
aliya0001 [1]
I think it might be C because we don't have too much room to dispose of these things with no harm to people

6 0
3 years ago
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Given that a chlorine-oxygen bond has an enthalpy of 243 kJ/mol , an oxygen-oxygen bond has an enthalpy of 498 kJ/mol , and the
Alecsey [184]

Explanation:

The chemical equation is as follows.

      \frac{1}{2}Cl_{2}(g) + \frac{1}{2}O_{2}(g) \rightarrow ClO(g)

And, the given enthalpy is as follows.

    \frac{1}{2}Cl_{2}(g) + O_{2}(g) \rightarrow ClO_{2}(g);  \Delta H = 102.5 kJ

    Cl-Cl = 243 kJ/mol,      O=O = 498 kJ/mol

Since, the bond enthalpy of Cl-Cl is not given so at first, we will calculate the value of Cl-Cl as follows.

   \Delta H = \sum \text{bond broken in reactants} - \sum \text{bond broken in products}

    102.5 = [(\frac{1}{2})x + 498] - [(2)(243)]

    102.5 = (\frac{1}{2})x + 498 - 486

     102.5 - 12 = \frac{x}{2}

           x = 181 kJ

Now, total bond enthalpy of per mole of ClO is calculated as follows.

       \Delta H = \sum E(\text{bond broken in reactants}) - \sum (\text{bond broken in products})

              x = [(\frac{1}{2})181 + (\frac{1}{2})498] - 243

                 = 339.5 - 243

                 = 96.5 kJ

Thus, we can conclude that the value for the enthalpy of formation per mole of ClO(g) is 96.5 kJ.

8 0
3 years ago
Answer this express as a chemical equation
Nataliya [291]

Answer:

Pb(No3)2+2Nacl_PbCl2+2NaNO3

6 0
3 years ago
PLEASE HELP What is the mass of sodium in 50 grams of salt? Show your work.
Inessa05 [86]

50 grams salt

Volume of 50 Grams of Salt

50 Grams of Salt =

2.78 Tablespoons

8.33 Teaspoons

0.17 U.S. Cups

0.14 Imperial Cups

4 0
4 years ago
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