Help please!! The graph shows Uranium decay.
What conclusion can be drawn?

A.
The half-life of Lead-207 is about 3,500 million years.

B.
The half-life of Lead-207 is about 800 million years.

C.
The half-life of Uranium-235 is about 800 million years.

D.
The half-life of Uranium-235 is about 3,500 million years.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

Some familiar products contain some of the same types of atoms. for instance, the chemical formula for baking soda is nahco 3. the chemical formula for liquid bleach is naclo, and the chemical formula for table salt is nacl. which choice best describes why these three products have some of the same types of atoms in common?

What is the volume of 3.2 moles of chlorine gas (cl2) at 295 k and 1.1 atm?