What is a mixture? Will give Brainliest  Potassium metal

Potassium chloride

Chlorine gas

Potassium and chloride

As a part of an experiment a student burns propane to produce carbon dioxide and water she remembers that she must follow the law conservation of matter when writing a balanced chemical equation which of these equation adheres to the law of conservation of matter

What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)? a. 5.0 × 103 b. 5.0 × 10-3 c. 5.0 × 1017 d. 5.0 × 10-17

What substance has a mass of 9.5g and volume of 2.1cm^3