Perfume evaporating, because the top is left off the bottle, is an example of a chemical change. True False

Which two gases can not be broken down by chemical means

What occurs when a substance is reduced

Bubbles and fizzing can be seen instantly when baking soda is mixed with vinegar. The bubbles are evidence of which of the following?

What is a kind of biochemical that does not dissolve in water and makes up cell walls fats oils and waxes?

How many electrons does it take to fill the outer shell of oxygen

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom

Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react to form water, carbon dioxide (CO2), and Na3C6H5O7.

Four properties of water are listed. 1. It is colorless and odorless in its pure form. 2. It reacts with metals to form metal hydroxide and hydrogen gas. 3. When heated to 100 °C, water evaporates. 4. It decomposes to form hydrogen and oxygen.

Water is A. Acidic B. Basic C. Neutral