Chemistry Flashcards (5 Cards) — Study Online

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Chemistry

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Question #1 Active Recall

What is the atomic mass of carbon?
A) 12.01 g/mol
B) 14.01 g/mol
C) 16.00 g/mol
D) 18.02 g/mol

Answer & Explanation:

A) 12.01 g/mol - Carbon has an atomic mass of approximately 12.01 g/mol, making it the standard for atomic mass calculations.

Question #2 Active Recall

Which of the following is a noble gas?
A) Oxygen
B) Nitrogen
C) Neon
D) Chlorine

Answer & Explanation:

C) Neon - Neon is a noble gas, which means it has a full valence shell and is inert, not forming compounds easily.

Question #3 Active Recall

What is the pH of pure water?
A) 7
B) 5
C) 9
D) 10

Answer & Explanation:

A) 7 - Pure water has a neutral pH of 7 at 25°C, which is considered neither acidic nor basic.

Question #4 Active Recall

Which bond is formed when electrons are shared between atoms?
A) Ionic bond
B) Covalent bond
C) Hydrogen bond
D) Metallic bond

Answer & Explanation:

B) Covalent bond - A covalent bond is formed when two atoms share electrons to achieve stability.

Question #5 Active Recall

What is the primary component of natural gas?
A) Ethanol
B) Methane
C) Propane
D) Butane

Answer & Explanation:

B) Methane - The primary component of natural gas is methane (CH4), which is a simple hydrocarbon.

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