Explanation

Fluorine, being the smallest halogen, has the weakest intermolecular forces and therefore the lowest boiling point. 

Explanation

The substance with the most moles is 3.8 g of H2O (0.211 moles).

Therefore, it has the largest number of molecules. 

Explanation

Glucose molecules contain multiple hydroxyl groups (-OH) which can form hydrogen bonds with water molecules, allowing them to readily dissolve in water. 

Explanation

Carbon monoxide is a toxic gas that interferes with the blood's ability to carry oxygen, making it harmful to humans.

It can cause symptoms like dizziness, nausea, and even death if inhaled in high concentrations.

Explanation

 Sir William Ramsay, a Scottish chemist, is credited with the discovery of the noble gases.

He first discovered argon and later found neon, krypton, and xenon. 

Explanation

Explanation

Explanation

 The statement "The amount of heat evolved or absorbed in a chemical reaction is the same no matter the reaction takes place in one step or several steps" describes Hess's law. 

Explanation

Carbon dioxide (CO2) reacts with calcium hydroxide (Ca(OH)2.

It is also known as lime water to form a white precipitate of calcium carbonate (CaCO3), which turns the solution milky:

Ca(OH)2 + CO2 → CaCO3 + H2O

This reaction is often used as a test for carbon dioxide.

Explanation

Steel is an alloy of iron (Fe) and carbon (C), with small amounts of other elements like manganese, chromium, and vanadium.

It's a mixture of two or more elements, where at least one is a metal, making it an alloy.