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AnnZ [28]
3 years ago
5

or each conjugate acid-base pair, identify the first species as an acid or base and the second species as the conjugate acid or

base of the first. A) CH3COOH and B) CH3COO- A. is _____ B. is _________ C) CH3O- and D) CH3OH C. is _____ D. is _________
Chemistry
1 answer:
Leni [432]3 years ago
4 0

Answer:

A. an acid

B. a base

C. conjugate base

D. conjugate acid

Explanation:

This question appears incomplete because it is starting with a "or".

However, the available question can still be answered.

An acid (according to "Bronsted-Lowry") is a chemical compound/specie that can donate hydrogen ion(s) in a reaction while a base is the compound/specie that can receive hydrogen ion(s). From this definition, <u>it can be deduced that</u> CH₃COOH <u>(ethanoic acid) is an acid (weak acid) because it can donate an hydrogen ion while</u> CH₃COO⁻ <u>is a base because it can receive a hydrogen ion</u>.

Also, a conjugate acid is the compound formed when an acid has donated a hydrogen ion to a base (i.e it is a base with hydrogen ion attached to it) while a conjugate base is the acid that has lost it's hydrogen ion. Thus, <u>the conjugate acid in the question is</u> CH₃OH <u>while the conjugate base in the question is</u> CH₃O⁻.

A. an acid

B. a base

C. conjugate base

D. conjugate acid

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How many molecules of ammonia, NH3, are in 3 moles of NH3?
alexandr1967 [171]

The number of molecules in one mole of any substance is equal to Avagadro's number

Avagadro's number is 6.023 X 10²³

Thus

1 mole = 6.023 X 10²³ molecules

for ammonia we are provided with three moles

so to obtain the total number of molecules of ammonia in three moles we will multiply the Avagadro's number with three

total molecules = 3 X 6.023 X 10²³

Total molecules of ammonia = 18.069 X 10²³

In scientific notation

Total molecules of ammonia = 1.8069 X 10²⁴ = 1.81 X 10²⁴

8 0
3 years ago
Which of the following is not a chemical change?
MaRussiya [10]

Answer:

May be boiling is the answer because all other options are a proper chemical changes.

3 0
3 years ago
Identify the element in C6H12O6 that allows it to be classified as an organic compound.
Alja [10]

Answer:

Carbon (C)

Explanation:

Organic chemistry is generally defined as the chemistry of carbon compounds. In order words, organic compounds are those compounds that contain carbon.

However, one characteristic of organic compounds is that in organic compounds, carbon links to itself to form long chains. This property is known as catenation. When we look at the compound. There are six carbon to carbon linkages. This is typical of organic compounds. Hence the substance is an organic compound.

7 0
4 years ago
What is the percentage by mass of oxygen in a formula unit of sodium hydrogen carbonate (NaHCO3)?
nadezda [96]

Percent by mass of an element can be calculated as

(Total mass of the element in the formula / formula weight ) * 100

Step 1 : Find formula weight of NaHCO₃

To find formula weight of NaHCO₃, we have to add atomic masses of the elements Na, H,C and O

Formula weight of NaHCO₃ = Na+H+C+3 (O)

Formula weight of NaHCO₃ = 22.99+1.01+12.01+3(16)

Formula weight of NaHCO₃ is 84.01 g

Step 2 : Use percent by mass formula

Percent by mass of oxygen = (total mass of oxygen / formula weight) * 100

Percent by mass of oxygen = \frac{3(16)}{84.01} * 100

Percent by mass of oxygen = 57.14%

Answer : percentage by mass of oxygen in a formula unit of sodium hydrogen carbonate (NaHCO3) is 57.14%

8 0
3 years ago
Read 2 more answers
Balance the following equation in acidic conditions. Phases are optional.
NISA [10]
I think the reaction involved here is a redox reaction in acidic conditions. To balance this type of reaction, we do as follows:

Balance the O atoms in each side by adding H2O on either side.
Balance H atoms in each side by adding H+.
Balance the charges by adding electrons.

Hope this helps.
4 0
4 years ago
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