IM SORRY THIS ISNT CHEMISTRY BUT GEOLOGY DOSENT APPEAR AND I NEED HELP WITH IT. THERE IS 2 OTHER SAMPLES BUT THEY CANT FIT IN. THE SAMPLES ARE IN ORDER. 4. Examine the photographs of sediment samples in the Unknown Samples Gallery, which is under Materials in the Lesson Resources. Match the pictured samples to the environments described in the Student Guide.

Sample # Estimated % Biogenous Material Estimated % Terrigenous Material Roundness /
Angularity Other Helpful
Characteristics Type of Environment
1
2
3
4
5
6
7

samples.

Explanation:

Sedimentary rocks

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

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