In the balanced reaction
2 Fe + O₂ → 2 FeO
2 moles of iron (Fe) react with 1 mole of molecular oxygen (O₂) to produce 2 moles of iron oxide (FeO). The ratio of Fe to FeO is 1-to-1, so if one starts with 42.4 mol of Fe, one will end up with the same amount of FeO, 42.4 mol.
Look up the molar mass of Fe and O:
• Fe = 55.845 g/mol
• O = 15.999 g/mol
Then the molar mass of FeO is approximately 71.835 g/mol, and so the mass of 42.4 mol of FeO is
(42.4 mol) × (71.835 g/mol) ≈ 3050 g
The truck now weighs 2130 kilograms. Hope this helps.
The literal equation for x is g/4+5y
<h3>Subject of formula</h3>
This is a way of representing a variable in terms of another
Given the equation below;
g=4x+5xy
Factor out x to have
g=x(4 + 5y)
Divide both sides by 4 +5y to have:
g/4+5y = x
x = g/4+5y
Hence the literal equation for x is g/4+5y
Learn more on subject of formula here: brainly.com/question/21140562
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Answer:
6x+20y
Step-by-step explanation:
Answer:
37
Step-by-step explanation:
10x40 = 400
2(39+42)+ 40 x 4 + 41 + X = 400
162 + 160 + 41 = 400 - X
400 - 363 = X
X= 37
