Which section of the ocean floor makes up half of the surface of Earth?

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

(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?