Okay so i think the answer to this is.
weight=mg
m=0.000100 g=9.80
so weight= 0.00980 kgm/s2
Hopefully thats correct (i am horrible at math)
1) Balanced chemical reaction
2 KCl O3 ---> 2 KCl + 3 O2
2) stoichiometry
2 mol of KCl O3 / 3 mol O2
atomic and molecular masses
K: 39 g/mol
Cl: 35.5 g/mol
O: 16 g/mol
KClO3: 39 + 35.5 + 3*16 = 122.5 g/mol
O2: 2*16 = 32 g/mol
ratio of masses: 2* 122.5 g of K Cl O3 / 3* 32 g O2
4) final calculations
3.450 g KClO3 * 96 g O2 / 245 g KClO3 = 1.352 g O2
5) Answer: 1.352 gO2
It is A. heterogeneous mix
As aluminium loses 12 moles of electrons oxygen gain 12 moles of electrons.
Explanation
4Al + 3 O2→ Al2O3
first write the ions of Aluminium and oxygen
that is, Aluminium ion is = Al^3+
oxygen ion is = O^2-
therefore one atom of Al loses 3 electrons moles while
one atom of O gain 2 electrons moles
from equation above there a total of number of Al atom are 4 =( 1 x4=4) atoms while
Oxygen atoms are 6= ( 3 x2=6) atoms
therefore the total number of Moles of Al lost is = 3 x 4 = 12 moles of electrons
total number of moles of O gained = 2 x6 = 12 moles of electrons
