Which sample of matter can be separted into different substances by physical means?

This is a body of water along the coast where freshwater from rivers and streams meets and mixes with salt water from the ocean. You could call this a place of transition from land to sea and freshwater to salt water. It is a (n) A) bay. B) estuary.

You can become an unsafe driver at BAC levels of what

The environment with the greatest biodiversity is the one with the greatest variety of

When placed in a 100mL cube shaped box a substance fills the cube and has a volume of 100 mL. When places in a 50mL tube that same amount of substance fills the tube and thus has a 50mL volume.

A 1.50 L buffer solution consists of 0.118 M butanoic acid and 0.318 M sodium butanoate. Calculate the pH of the solution following the addition of 0.063 moles of NaOH.

Benzene, C6H8, has an enthalpy of fusion = 10.19 kJ/mol. Calculate the amount of energy which is needed to change 88.0 g of solid benzene at 5.53°C into liquid benzene, also at 5.53°C?

What is the H3O + ion concentration of a solution that has an OH - ion concentration of 1.0 * 10^-3M? A) 1.0 * 10^-3M B) 1.0 * 10^-7M C) 1.0 * 10^-11M D) 1.0 * 10^-14M

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O In the reaction of 6 moles of CH4 with excess oxygen, how many moles of water could be produced? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen A. 4 B. 6 C. 8 D. 12

Most mutagens have what kind of an effect on an organism?

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.