The definition of chemical is "any substances that has a definite composition." What does "definite composition" mean?

Which indicates that the clump of waxy fluid at the center of the lamp is moving downward rather than upward? it is less dense than the surrounding liquid. its molecules are losing kinetic energy.

What happens to soft parts of organisms when cast fossils form?

Mutations in the nucleic acid sequence of a gene can sometimes direct the substitution of one amino acid for another in the encoded protein.

When a 6.50-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 21.6 degrees C to 37.8 degrees C. Calculate delta H (in kJ/mol NaOH) for the solution process.

Balance the following skeleton equation as illustrated below. H2 (g) + Cl2 (g) + HCl (g)

Which oxygen pachages materials and distributed them throughout the cell

How many atoms in 3 mol zn

Isotopes: are atoms of different elements which have the same mass are atoms of the same element with equal numbers of neutrons are atoms of the same element with different numbers of neutrons are atoms of the same element with equal numbers of

What would happen to the volume of a sample of gas if the temperature was decreased at the same time the pressure was increased?

How do the compounds that cause acid rain spread from their source?