Answer:
mass of Fe = 4.86 g
Explanation:
Balanced chemical equation
Sb₂S₃ + 3Fe → 2Sb + 3FeS
Given data from eq.
moles of iron = 3 mol
mas of iron = ?
moles of antimony trisulfide = 1 mol
mass of antimony trisulfide = 10 g
Solution
1st we will find out the mole ratio of Sb₂S₃ and Fe from balanced chemical equation
Sb₂S₃ : Fe
1 : 3
Now we find out number of moles of citric acid Sb₂S₃ from the given mass
<em> moles = mass / molar mass </em>
moles = 10 g / 339.7 g/mol
moles = 0.029 mol
Now we find out moles (x) of iron needed for 0.029 mol of antimony trisulfide
from the balanced chemical equation the mole ratios are:
1 : 3
0.029 : x
<em>Cross multiply these ratios </em>
3 × 0.029 = 1x
0.087 = 1 x
x = 0.087 mol
Now we will find out the mass of iron
mass = moles × molar mass
mass of Fe = 0.087 mol × 55.845 g/mol
mass of Fe = 4.86 g
Answer:
Explanation:
Octet, in chemistry, the eight-electron arrangement in the outer electron shell of the noble-gas atoms. This structure is held responsible for the relative inertness of the noble gases and the chemical behaviour of certain other elements.
Answer: D)The distance from Earth and mass of ISS exert negligible gravitational force on the astronaut.
Explanation:
The distance from Earth and mass of ISS exert negligible gravitational force on the astronaut. Gravity is a very weak force and varies with mass and the inverse square of distance. The astronaut's distance from Earth and the relative small mass of ISS result in gravitational force near zero.
Answer:
ΔHreaction = 263.15 kJ/mol
Explanation:
The reaction is as follow:
OH + CF₂Cl₂ → HOF + CFCl₂
You need to calculate the enthalpy of reaction and for this it is necessary to know the standard enthalpies for each of the compounds. These enthalpies are as follows and can be found in your textbook or on the Internet.
ΔHreaction = ∑ΔHproducts - ∑ΔHreactants
Answer:
Step 1: Obtain the mass of each element present in grams. Element % = mass in g = m.
Step 2: Determine the number of moles of each type of atom present. ...
Step 3: Divide the number of moles of each element by the smallest number of moles. ...
Step 4: Convert numbers to whole numbers.
Explanation:
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