What mass of Potassium Chlorate is needed to generate 75.0 L of Oxygen gas at Standard Temperature and Pressure?

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

How is the atomic number of a nucleus changed by alpha decay