In the following balanced chemical equation, what does the subscript number after oxygen in iron(III) oxide mean? 2 F e 2 O 3 + 3 C → 4 F e + 3 C O 2
Select one:

3 atoms of oxygen in iron (III) oxide

3 molecules of iron (III) oxide

3 molecules of oxygen in iron (III) oxide

3 atoms of iron (III) oxide

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

What is the molar mass of potassium nitrate, kno3

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give