Molar mass concept: The mass of one Avogadro number of helium atoms (i.e., one mole of He) equals what value? Recall molar mass equals atomic weight in grams per mole. Choose the correct option.

Q: Molar mass concept: The mass of one Avogadro number of helium atoms (i.e., one mole of He) equals what value? Recall molar mass equals atomic weight in grams per mole. Choose the correct option.

Concept He atomic weight ≈ 4.00 g/mol. Therefore one mole (Avogadro number of atoms) has mass 4 g.

Difficulty: Easy

1 g
2 g
4 g
8 g

Correct Answer: 4 g

Explanation:

Concept
He atomic weight ≈ 4.00 g/mol. Therefore one mole (Avogadro number of atoms) has mass 4 g.

More Questions from Chemistry

Indian R&D institutions (GK): Where is the National Chemical Laboratory (NCL) located in India? Choose the correct option.
Ionic size (isoelectronic series): Arrange the ionic radii of N³⁻, O²⁻, F⁻, and Na⁺ in the correct order. All have 10 electrons; size depends on nuclear charge Z. Choose the correct option.
Polymers (monomer identification): What is the monomer used to make polythene (polyethylene)? Give the correct simple alkene monomer. Choose the correct option.
Mineral processing: The ore-concentration method that exploits density differences between ore and gangue is called what? Think of gravity-based separation methods. Choose the correct option.
Post-harvest biology: Which gas is used commercially to induce/artificially ripen green fruits? Select the natural plant hormone gas used for ripening. Choose the correct option.
Periodic trends (electropositivity): Which of the following is the most electropositive element? Recall: metallic character increases down a group and to the left. Choose the correct option.
Materials (glass types): The inexpensive, common glass used in windows and bottles is called soda glass. Why is it called “soda” glass? Identify the key sodium-containing ingredient used in its manufacture. Choose the correct option.
Solubility (noble gases): The inert (noble) gases are ____ in water. Choose the correct qualitative description.
Concentration units: The number of moles of solute present in 1 kg of solvent is called what? State the correct concentration term and unit basis. Choose the correct option.
Mineral processing (froth flotation): Which oil is commonly used as a frothing agent/collector additive in the froth flotation process? Choose the correct option.

Discussion & Comments

No comments yet. Be the first to comment!