Answer:
The answer to your question is:
a) 0.069 moles of Iron
b) 0.052 moles of Oxygen
Explanation:
Data
mass Iron = 3.86 g
moles = ?
Atomic weight Fe = 56 g
Process
a) Solve it using a rule of three
56 g of Fe ---------------- 1 mol
3.86 g ---------------------- x
x = (3.86 x 1) / 56
x = 0.069 moles of Iron
b)
Balanced Equation
4Fe + 3O₂ ⇒ 2Fe₂O₃
Solve it using a rule of three
4 moles of Fe ----------------- 3 moles of O₂
0.069 moles of Fe --------- x
x = (0.069 x 3) / 4
x = 0.052 moles of Oxygen
Answer:
B. covers all body surfaces
Explanation:
epi=upper (outside of skin)
- Hope that helps! Please let me know if you need further explanation.
Question: What does it mean if an element is isoelectronic?
Answer: Isoelectronic is a term to describe a group of atoms or ions having the same number of electrons
Explanation: they are both the same because they bot have the same number of protons in each atom and they both will have the same always not diffrent its gonna have the same number
question answered by
(jacemorris04)
<h3><u>Answer;</u></h3>
D. jesse's car is a hybrid that shuts off extra pistons when it is not accelerating
<h3><u>Explanation;</u></h3>
- When cruising, hybrid cars are able to employ electrical energy to drive the car.
- Moreover, even if a vehicle is not a hybrid, a greater amount of fuel is consumed when one accelerates because the vehicle has to generate a force larger than the force of air resistance in order for it to accelerate.
- This increased demand of force reduces the vehicle's fuel economy.