How many moles of oxygen are needed to produce 7.7 liters of carbon dioxide​

If the element whose electric configuration ends in the d sublevel, the element is calssified as? a.inner transition b.noble gases c.representative d. transition

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

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.