Why are metallic and ionic substances harder to melt than covalent substances

Why does a burning splint burn more vigorously in pure oxygen?

What is the ph of a solution with [H+] of 10^-8

What is the specific heat of a substance that has a mass of 35.0 g and requires 625.0 calories to raise its temperature by 25.0C

Which is one way that Earth's atmosphere supports life? It filters out oxygen It keeps Earth warm. It increases UV radiation. It provides a solid shield.

Which are risks of using nuclear power plants to generate electricity? Check all that apply. Nuclear power plants produce highly toxic waste that breaks down very slowly. Nuclear power plants require undersea drilling that damages marine ecosystems.

Explain Charles law

2 H2 + O2 → 2 H2O What is the product of this chemical reaction

Which of the following is a chemical property? A.) Ability to burn B.) Mass C.) Density D.) All of the above

What is the density of rock if it has a mass of 25 g?

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction.