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nevsk [136]
4 years ago
8

Need the answer fast plz thanks

Chemistry
2 answers:
STatiana [176]4 years ago
7 0
The answeris B. petroleum
BlackZzzverrR [31]4 years ago
4 0
I would guess coal. Hope that helped!
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As a step O3 0.020 mol to gr
White raven [17]
Molar mass:

Atomic mass O = 16.0 a.m.u

O₃ = 16.0 x 3 => 48.0 g/mol

Therefore:

1 mole O₃ --------------- 48.0 g
0.020 mole O₃ ---------- ??

0.020 x 48.0 / 1 =

0.96 / 1 => 0.96 g 

hope this helps!
5 0
4 years ago
If a particular ore contains 55.4 % calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg of phosp
gizmo_the_mogwai [7]
 The ore contains 55.4% calcium phosphate (related to the mineral apatite) so the amount of Ca3(PO4)2 is 55.4%x=1000g so x=1000/0.554= 1.805kg. Now for the % of P in this amount of calcium phosphate, use all the masses of the elements in Ca3PO4= Ca=40.078 x 3= 120.23 and (PO4)2= (30.974+64)2=189.95  (NB oxygen is 16 mass x 4 =64) so the total mass is 310.2 and we have 61.95 of P (Pmass x 2) so 61.95/3102.= 0.19 or 19% P. So of the 1.805 x 0.19= 0.34kg of phosphorus.
8 0
4 years ago
What did rutherfords gold foil experiment help him conclude
Naya [18.7K]
It allowed him to realize that the mass of an atom is concentrated at its center because the atoms mostly went through the foil but some were deflected. He also realized that an atom probably wasn't just empty space and scattered electron and it had a positive center. 
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kumpel [21]

Answer:

The answer is C. six months

Explanation:

I hope this helps you bestie:))

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