On what basis do we distinguish between substances and separate them from one another?

In some fireworks there is a reaction between powdered aluminium and powdered barium nitrate in which heat is evolved and an unreactive gas is produced. What is the equation for this reaction? A. 2Al + Ba (NO3) 2 - > Al2O3 + BaO + 2NO B.

Identify the alkane that contains four carbons.

Both black and white road surfaces radiate energy. at midnight on a starry night the warmer road surface is the

How many moles is 1 billion (1 x 10^9) molecules O2

Arrange the isotopes of sulfur and phosphorus in order of decreasing number of neutrons. Rank the isotopes from most to fewest neutrons. To rank items as equivalent, overlap them. S-36 P-35 S-32 P-33 P-32 P-31

A blank is a special kind of mixture in which one substance is uniformly mixed into another

importance of pH value in daily life

How do metallic bonds differ from covalent and ionic bonds

Will ag2so4 precipitate when 100 ml of 5.0*10-2 m agno3 is mixed with 10 ml of 5.0*10-2mna2so4 solution?

How many grams of H₂ are produced with the reaction of 36 grams of water? 2 Na + 2 H20 - > 2 NaOH + h2