Describe what might be the result if water could freeze at a higher temperature. How might this affect chemical and biological systems that contain water?

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

How many molecules are in 6.0 moles of methane

Draw the lewis structure for the trisulfur s3 molecule. be sure to include all resonance structures that satisfy the octet rule.