Answer:Las moléculas orgánicas son importantes para los seres vivos porque la vida se basa en las propiedades del carbono. El carbono es un elemento importante porque puede formar cuatro enlaces covalentes. ... Los esqueletos de carbono contienen los grupos funcionales que participan en las reacciones bioquímicas.
Explanation: ahi tienes que tengas lauralejandrasg un gran dia
Answer:
Mass = 17.12 g
Explanation:
Given data:
Mass of Al = 3.90 g
Mass of H₂SO₄ = 13.65
Mass of aluminium sulfate = ?
Solution:
Chemical equation:
3H₂SO₄ + 2Al → Al₂(SO₄)₃ + 3H₂
Now we will calculate the number of moles of each reactant.
Moles of H₂SO₄:
Number of moles = mass/ molar mass
Number of moles = 13.65 g/ 98.079 g/mol
Number of moles = 0.14 mol
Moles of Al:
Number of moles = mass/ molar mass
Number of moles = 3.90 g/ 27 g/mol
Number of moles = 0.14 mol
Now we will compare the moles of aluminium sulfate with sulfuric acid and aluminium.
H₂SO₄ : Al₂(SO₄)₃
3 : 1
0.14 : 1/3×0.14 = 0.05
Al : Al₂(SO₄)₃
2 : 1
0.14 : 1/2×0.14 = 0.07
The number of moles of aluminium sulfate produced by sulfuric acid are less so it will limiting reactant and limit the amount of aluminium sulfate.
Mass of aluminium sulfate:
Mass = number of moles × molar mass
Mass = 0.05 mol × 342.15 g/mol
Mass = 17.12 g
Answer:
The relation ship is that when a volcano starts to erupt the ground starts to shake which is partialy an earth quake
Explanation:
Answer:
0.24
Explanation:
C2H4(g) + 3O2(g) ------> 2CO2(g) + 2H2O(g)
C3
H8
(g) + 5O2
(g) → 3CO2(g) +4H2
O(g)
Initially,
PV=nRT
125×V=(a+b)RT .....(i)
After combustion, pressure is due to the total moles of CO2
280×V=(3a+2b)RT .....(ii)
Dividing equation ii by i
280/125 = 3a+2b/a+b
2.24 = 3a+2b/a+b
2.24a + 2.24b =3a+2b
2.24b - 2b = 3a - 2.24a
0.24b = 0.76a
b= 3.2a
mole fraction of C3H8 = a/a + b = a/a + 3.2a = 1/4.2 = 0.24
<span>Answer is </span>(3)
- Sodium Nitrate.<span>
</span>Normally ionic bonds can be seen between
metals and non-metals while covalent
bonds present between
non-metals. Another thing that determines the bond nature is electronegativity
value of the atoms.
If the electronegativity difference
is high, then that bond tends to be an ionic bond.<span>
</span><span>Sodium nitrate consists of </span>Na⁺<span> and </span>NO₃⁻ ions. Hence, the bond
between Na⁺ and NO₃⁻<span> is an </span>ionic
bond. <span><span>
NO</span>₃⁻ </span><span>is made from </span>N <span>and </span>O<span>. Both are </span>non-metallic
atoms. <span>The </span>electronegativities <span>of </span>N <span>and </span>O <span>are </span>3.0 <span>and </span>3.5 <span>respectively. Hence, there is </span>no
big difference between
electronegativity values (3.5 - 3.0 = 0.5<span>). Hence, the bond
between N and O is a </span><span>covalent
bond. </span>