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Nesterboy [21]
2 years ago
8

One mole of silver has a mass of 107.9 grams. Approximately how many atoms of silver are present in one mole of silver?

Chemistry
2 answers:
steposvetlana [31]2 years ago
7 0

Answer  C) 6 × 1023 atom

Gemiola [76]2 years ago
3 0

Answer:

C

Explanation:

I took the quiz

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20 mL of Ba(OH)2 solution with unknown concentration was neutralized by the addition of 43.89 mL of a .1355 M HCl solution. Calc
bezimeni [28]

Answer:

Concentration of the barium ions  = [Ba^{2+}] = 0.4654 M

Concentration of the chloride ions  = [Cl^{-}]=0.9308 M

Explanation:

Moles (n)=Molarity(M)\times Volume (L)

Moles of hydrogen chloride = n

Volume of hydrogen chloride solution = 43.89 mL = 0.04389 L

Molarity of the hydrogen chloride  = 0.1355 M

n=0.1355 M\times  0.04389 L=0.005947 mol

Ba(OH)_2+2HCl\rightarrow BaCl_2+2H_2O

According to reaction, 2 moles of HCl reacts with 1 mole of barium hydroxide.

Then 0.05947 moles of HCl will react with:

\frac{1}{2}\times 0.05947 mol=0.029735 mol barium hydroxide

Moles of barium hydroxide = 0.029735 mol

Ba(OH)_2(aq)\rightarrow Ba^{2+}(aq)+2OH^-(aq)

1 mole of barium hydroxide gives 1 mole of barium ion in an aqueous solution. Then 0.029735 moles of barium hydroxide will give:

=1\times 0.029735 mol= 0.029735 mol

Volume of solution after neutralization reaction :

= 20.0 mL + 43.89 mL  = 63.89 mL = 0.06389 L

Concentration of the barium ions =[Ba^{2+}]

[Ba^{2+}]=\frac{0.029735 mol}{0.06389 L}=0.4654 M

Ba(Cl)_2(aq)\rightarrow Ba^{2+}(aq)+2Cl^-(aq)

1 mole of barium chloride gives 1 mole of barium ions and 2 moles of chloride ions in an aqueous solution.

Then concentration of chloride ions will be:

[Cl^-]=2\times [Ba^{2+}]=2\times 0.4654 M=0.9308 M

8 0
3 years ago
PLEASEEE HELP !!! How many moles of H2O are equivalent to 97.3 grams of H2O? <br><br> ___? = mol
Aleks04 [339]

no. of moles=mass/molar mass

                    =97.3/18

                    =<u>5.40555555556 moles</u>

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3 years ago
What dog is most like a wolf?
nekit [7.7K]

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Siberian Husky

Explanation:

7 0
3 years ago
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from the following chemical reaction , calculate the moles of mg if 3.5 mol of hcl in reactant mg + 2hcl --&gt; mgcl2 + h2
sveticcg [70]
1.75 moles or 1.8 moles if you’re rounding in terms of sig figs
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The mass of 2.50 moles of calcium fluoride is ____ grams
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Answer:

195.187016

Explanation:

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