What is a substance that contains only a single type of atom

When water becomes ice, the molecules spread out to form a specific shape. What determines this shape?

Becky wanted to figure out what type of work would work the best for growing beans see you watered one with Coca-Cola one with lemonade and another one just with water after one week she measure how high they had a growth

Which form of bond between two carbons is capable of rotation without breaking the bond? * single bond double bond triple bond

How do we know if their is DNA in our food?

What is the pressure in a gas container that is connected to an open-end U-tube manometer if the pressure of the atmosphere is 752 torr and the level of mercury in the arm connected to the container is 9.

A 0.070 M solution of the salt NaB has a pH of 9.60. Calculate the pH of a 0.010 M solution of HB. Or, what is the Kb of HB?

Classify each of the following as an element, a compound, or a mixture: (a) iron (b) oxygen (c) mercury oxide (d) pancake syrup (e) carbon dioxide (f) a substance composed of molecules each of which contains one hydrogen atom and one chlorine atom

If an unknown mineral has a hardness between 5 and 9, what could you do to the mineral to find out more about its hardness?

Which of the following events would most likely produce an earthquake? A. During flooding, water exerts pressure on the land, causing wide cracks in the ground. B.

Which of these are the correct base pairs of DNA? A. adenine and uracil B. cytosine and guanine C. cytosine adenine D. thymine and guanine