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Illusion [34]
3 years ago
8

Identify the conjugate acid-base pair in this balanced equation: H2SO4 + 2NaOH → 2H2O + Na2SO4

Chemistry
2 answers:
Ludmilka [50]3 years ago
4 0
H2SO4/H2O
H2SO4/Na2SO4
NaOH/H20
NaOH/Na2SO4
Correct answer is H2SO4/Na2SO4
kipiarov [429]3 years ago
3 0

Answer is: H₂SO₄/Na₂SO₄.

Chemical dissociation of sulfuric acid in water:  

H₂SO₄(aq) → 2H⁺(aq) + SO₄²⁻(aq).

Sulfuric acid is strong diprotic acid. It dissociates on hydrogen cations (H⁺) and sulfate anion (SO₄²⁻).

Sulfate anion is conjugate base of sulfuric acid.

According to  Bronsted-Lowry theory acid are donor of protons and bases are acceptors of protons (the hydrogen cation or H⁺).

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Alla [95]
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5 0
3 years ago
I will give brainliest!! How long is the pencil? Make sure to use the appropriate amount of significant figures.
8090 [49]

Answer: Option (c) is the correct answer.

Explanation:

The bottom of pencil is placed at the starting point of scale. Whereas the tip of pencil depicts the end point of its length.

The bottom of pencil is at 0 mm and tip of pencil is at 18.73 mm. The appropriate amount of significant figures is 18.73 mm.

Therefore, we can conclude that out of the given options, pencil is 18.73 mm long.


5 0
3 years ago
The element lanthanum has two stable isotopes, lanthanum-138 with an atomic mass of 137.9 AMU and lanthanum-139 with an atomic m
dmitriy555 [2]

Answer:

A. there is an isotope of lanthanum with an atomic mass of 138.9

Explanation:

By knowing the different atomic masses of both Lanthanum atoms, we can not tell anything about their occurence in nature. Therefore, all the last three options are incorrect. Because, the atomic mass does not tell anything about the availability or natural abundance of an element.

Now, the isotopes of an element are those elements, which have same number of electrons and protons as the original element, but different number of neutrons. Therefore, they have same atomic number but, different atomic weight or atomic masses.

Hence, by looking at an elements having same atomic number, but different atomic masses, we can identify them as isotopes.

Thus, the correct option is:

<u>A. there is an isotope of lanthanum with an atomic mass of 138.9.</u>

7 0
3 years ago
Express the following in regular notation:
dusya [7]
A because if you multiple it, you will be moving the decimal one time
8 0
3 years ago
Find the density of an object that has a mass of 5 kg and a volume of 50 cm3?
myrzilka [38]
Density = mass / volume

Mass = 5 kg

Volume = 50 cm³

d = 5 / 50

d = 0,1 kg/cm³

4 0
3 years ago
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