Why are scientist interested in exploring mars

Use the periodic table to find the atomic weight for tin (Sn). 50 119 170

Glass breaking is an example of: Chemical change Chemical properties Temperature change Physical change

Equations can be balanced by using the half-reaction method. Which step should be completed immediately after finding the oxidation states of atoms?

Which of the following is not a result of air pollution? A. Smog B. Breathing problems C. Global warming D. Soil erosion

What is an element? a. A substance that is made of water. b. A substance made of only one type of atom. c. A substance that is made of no atoms. d. A substance made of more than one type of atom.

Much of life on Earth is based in aquatic biomes. What property of water allows life to survive in liquid water?

A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have? 13 9 5 4

Calculate the maximum mass of carbon dioxide that could be obtained by adding excess hydrochloric acid to 15 g of calcium carbonate.

True or false: during dry weather, the water level in a small pond drops because of runoff.

Bradley hit a baseball with a bat. The baseball then hit a window and caused the window to break. Where did the energy that broke the window come from?