Which scenario best describes a chemical change?

A. water conducting electricity

B. copper pipe being cut into pieces

C. copper corroding in the presence of oxygen

D. water freezing into ice

Can someone explain quantum number sets?

How many moles are in 1.50 grams of ethanol, CH3CH2OH?

When 40.0 mL of 1.00 M H2SO4 is added to 80.0 mL of 1.00 M NaOH at 20.00°C in a coffee cup calorimeter, the temperature of the aqueous solution increases to 29.20°C. If the mass of the solution is 120.

Over time a hypothesis that is supported by many experiments and much data becomes a

Which of the following contains the smallest amount of matter

Part C Why are dichotomous keys useful in classifying a new species?

2. How is the frequency of a wave determined?

Ammonium acetate chemical formula

Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to 1/4.00 of the original amount. How long ago was this plant alive?

Balance this equation---> Fe (s) + O2 (g) - - - >FeO (s) (s) = solid (g) = gas