phân tử gram

Một phân tử gram nước có khối lượng khoảng 18 gam.

Definition

1. Noun (Chemistry):
   • Gram molecule: A unit of measurement in chemistry representing the molecular weight of a substance expressed in grams. It is synonymous with the modern unit "mole," which contains Avogadro's number (approximately 6.022 x 10²³) of molecules of that substance.

Usage Examples

• Noun:
  • Một phân tử gram nước có khối lượng khoảng 18 gam. (One gram molecule of water has a mass of about 18 grams.)
  • Khái niệm phân tử gram nay thường được thay thế bằng đơn vị mol. (The concept of a gram molecule is now often replaced by the unit mole.)

Advanced Usage

• The term "phân tử gram" is considered a legacy or historical term in scientific contexts. In modern chemistry, the mole is the standard and preferred SI unit for measuring the amount of substance.
  • Tính toán sử dụng phân tử gram vẫn có thể tìm thấy trong các tài liệu cũ. (Calculations using the gram molecule can still be found in older literature.)

Variants and Related Words

• Mol (n): The modern, standard unit for amount of substance, equivalent to a gram molecule.

  • Thí nghiệm yêu cầu 2 mol khí hydro. (The experiment requires 2 moles of hydrogen gas.)

• Phân tử gam (n): An alternative, less common spelling with the same meaning as "phân tử gram."

Synonyms

• Mole: The standard unit of amount of substance.
• Gram-molecule: A direct English equivalent.

Notes on Usage

• "Phân tử gram" is a compound noun. It is a technical term used specifically in the field of chemistry.
• In contemporary Vietnamese scientific and educational texts, the borrowed term "mol" is overwhelmingly more common and should be used for clarity and modernity.