What mass in grams of the magnetic oxide of iron (Fe3O4) can be made from 23.0 g of pure iron and an excess of oxygen?

The equation is Fe+O2→Fe3O4 (not balanced)
Express the mass to three significant figures and include the appropriate units.

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

i can ! i just need to know what the paragraph is! : p

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

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