How many molecules are in 0.25 mole of CO? 1) 1.5*10^23
2) 6.0*10^23
3) 3.0*10^23
4) 9.0*10^23

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.

Ok, so i have 2 questions. try to answer them both: (the topic is fire) 1) how can you represent the chemical reaction of fire? 2) what kind of bond is formed in this chemical reaction

Ashell can hold a maximum of 32 electrons, what is the value of n?