What is the central atom of C2H4Br2

Using stoichiometry, 3.24 grams $NaHCO_{3}$ will yield 2.04 grams $Na_{2} CO_{3}$ and 1.20 grams $H_{2} CO_{3}$ . But in an actual decomposition where the mass of one of the products was measured to be 2.01 grams, which is $Na_{2} CO_{3}$ , the percent yield is 98.34%.

Stoichiometry is defined as the relationship between the amounts of substances that are involved in chemical reactions.

Mole ratio relates the amounts in moles of any two substances by looking at the coefficients in front of each species in the balanced chemical equation.

For the decomposition of $NaHCO_{3}$ , it follows the balanced chemical equation:

$2NaHCO_{3} = Na_{2} CO_{3}+H_{2} CO_{3}$

2 moles of $NaHCO_{3}$ will decompose into 1 mole of $Na_{2} CO_{3}$ and 1 mole of $H_{2} CO_{3}$

mole ratio = 2 : 1 : 1

If the mass of $NaHCO_{3}$ sample is 3.24 grams, then

molar mass = m/n

84.007 g/mol = 3.24 g/n

n = 0.03856821455 mol $NaHCO_{3}$

and using the mole ratio 2 : 1 : 1, theoretically,

0.03856821455 mol $NaHCO_{3}$ will yield 0.01928410728 mol $Na_{2} CO_{3}$ and 0.01928410728 mol $H_{2} CO_{3}$ .

If there's 0.01928410728 mol $Na_{2} CO_{3}$ , its mass is:

molar mass = m/n

105.9888 g/mol = m/ 0.01928410728

m = 2.043899389 g $Na_{2} CO_{3}$

On the other hand, if there's 0.01928410728 mol $H_{2} CO_{3}$ , then

molar mass = m/n

62.03 g/mol = m/0.01928410728

m = 1.196193174 g $H_{2} CO_{3}$

If the mass of one of the products was measured to be 2.01 grams, then it must be $Na_{2} CO_{3}$ since the experimental value is much closer to the theoretical mass.

Calculating its percent yield,

percent yield = actual yield/theoretical yield x 100%

percent yield = 2.01 g/2.043899389 g x 100%

percent yield = 98.34143552% = 98.34%

To learn more about stoichiometry: brainly.com/question/25829169

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2 years ago

How small atom partical are?

ElenaW [278]

Atoms of particles are so small that they cannot be divided further by any physical means.

<h3>What are atoms?</h3>

According to John Dalton, atoms are the smallest, indivisible particles of elements.

However, it was later found out that chemically, atoms consist of protons, neutrons, and electrons.

Thus, the indivisibility of atoms that John Dalton was referring to must be that of physical division.

In other words, the particles of atoms are so small that dividing them further using physical means is absolutely impossible.

More on the atoms can be found here: brainly.com/question/1566330

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2 years ago