CHEMISTRY COLLEGE

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.

Answers

Answer 1
Answer:

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  =

Answer 2
Answer:

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:

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

Keywords: stoichiometry, moles


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Answers

Plants make food through the process of photosynthesis. :)

Answer:

By photosynthesis

Explanation:

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COLLEGE

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

Answers

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.

This the required answer.


HIGH SCHOOL

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

Answers

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
HIGH SCHOOL

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

Answers

Answer:

The answer to your question is CuSO₄

Explanation:

To answer your question just remember the following information

- 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.

Then, the answer is CuSO₄

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