Well I'm sure many a time you've seen on some science experiment someone wrap a copper wire around a nail well thats generally the idea for electromagnets you get a solid piece of iron which is the only metal that is magnetic and you wrap a copper wire around it and the idea is to make two opposing magnetic poles by aligning the molecules with a electrical charge (a battery) so now with all three pieces assembles you have a copper wire attached to two sides of a battery and wrapped around a nail
Answer:
Ammonia is limiting reactant
Amount of oxygen left = 0.035 mol
Explanation:
Masa of ammonia = 2.00 g
Mass of oxygen = 4.00 g
Which is limiting reactant = ?
Balance chemical equation:
4NH₃ + 3O₂ → 2N₂ + 6H₂O
Number of moles of ammonia:
Number of moles = mass/molar mass
Number of moles = 2.00 g/ 17 g/mol
Number of moles = 0.12 mol
Number of moles of oxygen:
Number of moles = mass/molar mass
Number of moles = 4.00 g/ 32 g/mol
Number of moles = 0.125 mol
Now we will compare the moles of ammonia and oxygen with water and nitrogen.
NH₃ : N₂
4 : 2
0.12 : 2/4×0.12 = 0.06
NH₃ : H₂O
4 : 6
0.12 : 6/4×0.12 = 0.18
O₂ : N₂
3 : 2
0.125 : 2/3×0.125 = 0.08
O₂ : H₂O
3 : 6
0.125 : 6/3×0.125 = 0.25
The number of moles of water and nitrogen formed by ammonia are less thus ammonia will be limiting reactant.
Amount of oxygen left:
NH₃ : O₂
4 : 3
0.12 : 3/4×0.12= 0.09
Amount of oxygen react = 0.09 mol
Amount of oxygen left = 0.125 - 0.09 = 0.035 mol
Liter measures liquid- so a measuring cup
The molecular formula of cortisol is C₂₁H₃₀O₅
Explanation:
To find the cortisol formula we use the following algorithm:
divide each element percentage by the atomic weight of the element
for carbon 69.9 / 12 = 5.83
for hydrogen 8.34 / 1 = 8.34
for oxygen 22.2 / 16 = 1.41
now the we divide the obtained numbers by the lowest one, which is 1.41
for carbon 5.83/ 1.41 ≈ 4
for hydrogen 8.34 / 1.41 ≈ 6
for oxygen 1.41 / 1.41 = 1
the empirical formula of cortisol is C₄H₆O
the molecular formula of cortisol is (C₄H₆O)ₓ
70x = 362.47
x = 362.47 / 70
x ≈ 5.2
carbon ≈ 5.2 × 4 ≈ 21
hydrogen = 5 × 6 = 30
oxygen = 5 × 1 = 5
The molecular formula of cortisol is C₂₁H₃₀O₅
Learn more about:
determining the molecular formula of a compound
brainly.com/question/13764849
#learnwithBrainly
