# A sample of sodium reacts completely with 0.426 kg of chlorine, forming 702 g of sodium chloride. What mass of sodium reacted? Express your answer to three significant figures and include the appropriate units.

The given reaction is:

First, calculate the number of moles of sodium chloride.

Number of moles  =

Molar mass of sodium chloride  =

Number of moles of =

=

Now, from the reaction; two moles of sodium gives two moles of sodium chloride.

So, 12 moles of sodium chloride needed = moles of sodium.

Thus, number of moles of sodium = moles

Now, mass of sodium  =

=

=

Thus, mass of sodium  =

276 grams of sodium reacted with 0.426 kg of chlorine to form 702 g of sodium chloride.

Further Explanation

This is an example of a simple stoichiometry problem.

To determine the mass of sodium that reacted, two paths may be used:

1. use the stoichiometric ratio between sodium and chlorine
2. use the stoichiometric ratio between sodium and sodium chloride

To solve this problem, first write the balanced chemical equation:

2Na + Cl₂ → 2 NaCl

Based on the stoichiometric ratio, we can determine the mass of sodium that reacted through dimensional analysis.

1) Using the stoichiometric ratio of sodium and chlorine

2) Using the stoichiometric ratio of sodium and sodium chloride

Since the mass of Na is required to be given in three significant figures, then the final answer is:

• Dimensional Analysis brainly.com/question/2749176
• Neutralization brainly.com/question/7201942

Keywords: stoichiometry, moles

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By photosynthesis

Explanation:

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100 mL of 0.06 M TRIS hydrochloride (C4H12ClNO3) is titrated with 1.0 M sodium hydroxide (NaOH). what is the pKa

Explanation:

According to Henderson-Hasselbalch equation:

pH =

When pH = pKa = 8.

Therefore,

8 = 8 +

= 0

=

= 1

Hence,  [TRIS] =

As, fraction of amine groups converted to

=

=

=

=

= 0.5

Hence, we can conclude that fraction of the amine group coverted to is 0.5.

Solution:

According to the Henderson-Hasselalch equation:

TRIS-HCl + NaOH ---> TRIS + H2O + NaCl

Treat TRIS-HCl as a monoprotic acid, so there is a 1:1 molar ratio between TRIS-HCl and NaOH.

Hen one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____.

Hello  Squirrel9177

Answer: When one atom contributes both bonding electrons in a single covalent bond, the bond is called a coordinate covalent bond

Hope This Helps!
-Chris

Fe(s) + CuSO4(aq) ⇒ Cu(s) + FeSO4(aq) Which reactant is a substance that is dissolved in solution?

Explanation:

- A chemical reaction is divided into sections

reactants and products

reactants on the left side of the reaction

products on the right side of the reaction

- All the symbols have a meaning

(s) means that that compound is in solid phase

(aq) means that that compound is dissolved in solution.