Answer:
0.87mole
Explanation:
The reaction equation is given as;
4Fe + 3O₂ → 2Fe₂O₃
Number of moles of Fe₂O₃ in 138.5g
To solve this problem;
Number of moles = 
Molar mass of Fe₂O₃ = 2(56) + 3(16) = 160g/mol
Now;
Number of moles = 
= 0.87mole
Water, food, shelter, oxygen, a steady temperature.
here's five, just pick 4, good luck :)
Answer:
Oil spills into rivers, bays, and the ocean most often are caused by accidents involving tankers, barges, pipelines, refineries, drilling rigs, and storage facilities.
Spills can be caused by:
people making mistakes or being careless.
equipment breaking down.
natural disasters such as hurricanes.
deliberate acts by terrorists, countries at war, vandals, or illegal dumpers.
Explanation:
Hope this helped Mark BRAINLIEST!!!
Explanation:
4=true
5. true
hope this helps. good luck with your test.
<span>This question cannot be answered in actual centimeters unless at least one edge has a known length however it can be written as (length^3) or (length cubed). As an example if the sample of gold cube had one length of 3cm then all lengths would be 3cm on the cube.</span>
