Compozitia procentuala a NaCl

What is the total number of valence electrons in an atom of germanium in the ground state? (1) 8 (3) 14 (2) 2 (4) 4

Which sample has the lowest entropy? (1) 1 mole of KNO3 (l) (3) 1 mole of H2O (l) (2) 1 mole of KNO3 (s) (4) 1 mole of H2O (g)

Groundwater moves from the ground through plants and then back into the atmosphere through the process of D) transpiration.

Which scientist first discovered DNA

Groups of cells that work together to do a specific job

A chemical is placed in a beaker containing 20 g of soil and 500 mL of water. At equilibrium, the chemical is found in the soil ast a concentration of 100 mg. kg-1 of soil.

A solid reactant is placed into a beaker of warm water. The liquid vigorously bubbles as the soild dissolves into the solution. What will most likely happen if the temperature of the liquid is slightly reduced

How does the space between atoms change as agas goes through prase changes to become a soild? how. do they different? use words to describe

What is an endothermic reaction? O A. A reaction that produces heat O B. A reaction that uses radiation waves C. A reaction that absorbs heat O D. A reaction that contains enthalpy

How does the conservation of matter relate to balancing equations?