Which organism lived on Earth during the Paleozoic era? A. trilobite B. dinosaur C. pine tree D. octopus

What kind of evidence indicates a chemical change? ... a physical change? you may use examples to show softened.

If the universe were contracting what would happen to the light from the other galaxy as it reached earth a it would dimmer b it would be brighter c it would be blue shift d it would be red shifted

What is the oxidation number for each atom in NH4CI?

How many grams of oxygen are in 56 g of c2h2o2?

2. How does the mass-energy equation E = mc2 relate to fission? day stry O a large amount of mass can produce a large amount of energy a small amount of mass can produce a large amount of energy a large amount of mass can produce a small amount of

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