The half-life of a certain radioactive element is 1250 years. what percent of the atom remains after 7500 years?

Yet a third pair of compounds of manganese and oxygen is 50.48% and 36.81% oxygen respectively. In what small whole number ratio do masses of oxygen combine with a fixed mass of manganese in these two compounds

Polished metals have a metallic luster, which means that?

How is an electromagnet different from a bar magnet? A) Bar magnets have a north and south pole, but electromagnets do not. B) Electromagnets are strong, permanent magnets, but bar magnets are always weaker.

What are the oxidation numbers for CrO4^-2?

Nacl does not dissolve well in non-polar solvents because

State hess's law. how is it used

When the name of a molecule ends in - ose, the molecule is a

How many moles are in. 12 grams of gold.

When lithium reacts with bromine to form the compound LiBr, each lithium atom: (1) gains one electron and becomes a negativelycharged ion (2) gains three electrons and becomes a negativelycharged ion (3) loses one electron and becomes a

Based on what you know about matter, explain why the food coloring mixes at different rates