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2 years ago

List the numbers of each atom in all the formulas above: H C

Chemistry

2 answers:

bezimeni [28]2 years ago

6 0

Answer:

1) H = 14; C =6.

2) H = 14; C =6.

3) H = 14; C =6.

4) H = 14; C =6.

5) H = 14; C =6.

Molecular formula of this molecules is C₆H₁₄. Those molecules are alkanes with same molecular formula and different structural formula.

General formula for alkanes is CₓH₂ₓ₊₂.

Hexane is alkane (acyclic saturated hydrocarbon, carbon-carbon bonds are single) of six carbon atoms.

d1i1m1o1n [39]2 years ago

3 0

<em>Answer:</em>

1) 14

2) 6

<em>Explanation: edg 2020</em>

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2 years ago

If 38.55 mL of HCl is required to titrate 2.150 g of Na2CO3 according to the following equation, what is the molarity of the HCl

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The molarity of the HCl solution : 1.052 M

<h3>Further explanation</h3>

Given

Volume of HCl = 38.55 ml

mass of Na₂CO₃ (MW=106 g/mol)=2.15 g

Reaction

Na₂CO₃(aq) + 2HCl (aq)→ 2NaCl (aq) + CO₂ (g) + H₂0 (l)

Required

The molarity of the HCl solution

Solution

mol Na₂CO₃ :

$\tt mol=\dfrac{mass}{MW}=\dfrac{2.15}{106}=0.02028$

From the equation, mol ratio Na₂CO₃ : HCl = 1 : 2, so mol HCl :

$\tt mol~HCl=2\times 0.02028=0.04056$

The molarity :

$\tt M=\dfrac{n}{V}=\dfrac{0.04056}{0.03855~L}=1.052~M$

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