Type of disease in which the body attacks is own cell

Sulfur does not dissolve in water but it does dissolve in carbon disulfide

Who was the first scientist to propose that the atom had a dense nucleus which occupied only a small fraction of the volume of the atom?

Determine the molarity of a 45ml 7 moles solution of HCI

Segundo o entendimento do STF, assinale a alternativa correta sobre o pedágio:

Is testing for fingerprints on a door a physical or chemical change

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?