Explanation

Kerosene oil is used as jet fuel, commonly known as Jet-A or Jet-A1.

It has a high energy density and good combustion properties suitable for aircraft engines.

Explanation

To calculate the molarity, we need to calculate the number of moles of sodium chloride (NaCl) dissolved in 500 cm³ (or 0.5 L) of solution.

Molar mass of NaCl = 58.44 g/mol

Number of moles = mass / molar mass = 40 g / 58.44 g/mol ≈ 0.684 mol

Molarity = number of moles / volume (in liters) = 0.684 mol / 0.5 L ≈ 1.368 M

Rounded to one decimal place, this is approximately 1.4M.

Explanation

The molar mass of sodium chloride (NaCl) is 58.44 g/mol.

To find the mass of 2 moles of NaCl, you can multiply the molar mass by 2: 2 mol × 58.44 g/mol = 116.88 g

Rounded to the nearest gram, this is approximately 117 grams.

Explanation

• A covalent bond is a chemical bond formed by the mutual sharing of electrons between two atoms.
• This type of bond typically occurs between nonmetal atoms, such as in molecules and organic compounds.

Explanation

• Transition elements, also known as transition metals, are a group of elements in the d-block of the periodic table.
• They are characterized by their ability to form ions with different charges.
• They are often found in the middle of the periodic table.

Explanation

• Carbon-12 (C-12) is the most abundant of the two stable isotopes of carbon, amounting to 98.93% of elemental carbon on Earth.
• Carbon-12 is composed of six protons, six neutrons, and six electrons.
• The atomic mass of carbon-12 is exactly 12 Dalton's, by definition.

Explanation

The molar mass of H2SO4, also known as sulfuric acid, is 98 grams per mole (g/mol).

Explanation

The pH scale ranges from 1 to 14, with:

• 1-6 being acidic
• 7 being neutral (neither acidic nor basic)
• 8-14 being basic (alkaline)

Explanation

Common web browsers include:

• Microsoft Edge
• Internet Explorer
• Google Chrome
• Mozilla Firefox
• Apple Safari
  

Explanation

• In the periodic table, a columns is considered to be a groups (also known as a family or column).
• Groups are the vertical columns of elements in the periodic table.