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Margarita [4]
3 years ago
8

To test the purity of sodium bicarbonate, you dissolve a 3.50g sample in water and add sulfuric acid. if 1.04g of carbon dioxide

forms, what is the percent purity of the sodium bicarbonate?
Chemistry
1 answer:
Andrews [41]3 years ago
8 0

Answer is: the percent purity of the sodium bicarbonate is 56.83 %.

1. Chemical reaction: 2NaHCO₃ + H₂SO₄ → 2CO₂ + 2H₂O + Na₂SO₄.

2. m(NaHCO₃) = 3.50 g

n(NaHCO₃) = m(NaHCO₃) ÷ M(NaHCO₃).

n(NaHCO₃) = 3.50 g ÷ 84 g/mol.

n(NaHCO₃) = 0.042 mol.

3. From chemical reaction: n(NaHCO₃) : n(CO₂) = 1 : 1.

n(CO₂) = 0.042 mol.

m(CO₂) = 0.042 mol · 44 g/mol.

m(CO₂) = 1.83 g.

4. the percent purity = 1.04 g/1.83 g  ·100%.

the percent purity = 56.8 %.

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1 year ago
How are breathing and cellular respiration related? (15 points if answered)
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7 0
2 years ago
Read 2 more answers
A 5-column table with 2 rows. Column 1 is labeled number of protons, with entries A and D; column 2 is number of neutrons, with
pogonyaev

Answer:

A = 8

B = 8

C = Oxygen (O)

D = 26

E = 30

F = Iron (Fe)

Explanation:

protons    neutrons    atomic number    mass number     element

A               7                 B                           15                        C

D               E                 26                         56                       F

mass number = protons + neutrons

E = 56 - 26 = 30

A = 15 - 7 = 8

protons = atomic number

B = 8

D = 26

From atomic number:

C = Oxygen (O)

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5 0
3 years ago
For the following dimensional equation, find the base dimensions of the parameter f. MM" = a cos(fL) Solution
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Answer:

L^{-1}.

Explanation:

Given that

MM''= a cos(fL)

We know that all trigonometric function are dimensional less.So fL should be dimension less quantity.

Property                                      Dimension

Length                                            L

Mass                                              M

Force                                            MLT^{-1}

Acceleration                              LT^{-2}

Velocity                                          LT^{-1}    

Torque                                          ML^2T^{-1}

Time                                                    T^{-1}

So in the given question ,dimension of L is L so the dimension of f will become L^{-1}.

6 0
3 years ago
What is the molar mass of nitrogen gas, N2(g)? How many moles of nitrogen
spin [16.1K]

Answer:

28g/mol

2 moles of nitrogen are present

Explanation:

The molar mass is defined as the mass of a chemical when 1 mole of this substance is present and is used to convert mass of the substance to moles or vice versa. Is widely used in stoichiometry problems.

1 atom of nitrogen has a molar mass of 14g/mol. N₂(g) -The molecule that contains 2 atoms of nitrogen- has a molar mass of 28g. That is 28g/mol.

56g of N₂ are:

56g * (1mol / 28g) =

<h3>2 moles of nitrogen are present</h3>
5 0
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