Answer:
the answers 5, also did u finish ur ia yet,
if so you know what to do.
Explanation:
Answer:
The real answer for a is-He(helium)4,002602
The answer for b is-Mg(Magnesium) 24.305
Answer:
67.4 mol of O atoms
Explanation:
Cassitrerite is a Tin Mineral having a chemical formula SnO₂. As seen in chemical formula there are two moles of Oxygen atoms for each Tin atom. So we can conclude that,
For,
1 mole of Sn in SnO₂ there are = 2 moles of O atoms
So for,
33.7 moles of Sn there will be = X moles of O atoms
Solving for X,
X = (33.7 mol of Sn × 2 mol of O) ÷ 1 mol of Sn
X = 67.4 mol of O atoms
Molar mass of CaCl2 = 40+ ( 35.5 ×2)=110
Mr of Ca(OH)2 = 40+ (16+1)×2 =74
%of Ca = (40÷ 74)×10=...
1 m = 100cm...
1cm = (1÷100) m
So 45.5 cm = 45.5 ×(1÷100) =....
1km = 1000m
1m = 100 cm
1cm =10mm
So 1km = 1000×100×10 mm
Now convert
<span>Similarities:
-Physical properties can be observed or measured without changing the composition of matter.
-Physical properties are used to observe and describe matter.
</span><span>Differences;
-Chemical properties are only observed during a chemical reaction and thus changing the substance's chemical composition.
</span>
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