The mass of 2.75 mol K₂S is 303.24 grams.
- Applying the mole concept:
Number of moles(n) = given mass(m) / molar mass(M)
n = m / M
- Now applying the formula for the number of moles-
i.e. number of moles of K₂S = mass of K₂S / Molas mass of K₂S
As per question, Molar mass of K₂S, M = 110.27 g/mol
and, number of moles of K₂S, n = 2.75 moles
2.75 = m / 110.27
m = 2.75 x 110.27
= 303.24
m = 303.24 grams.
Hence, the mass of 2.75 mol K₂S is 303.24 grams.
To learn more about the mole concept, refer to:
brainly.com/question/768852
# SPJ2
Answer:
Magnesium oxide
Explanation:
When magnesium reacts with oxygen, the magnesium atoms donate electrons to O2 molecules and thereby reduce the oxygen. Magnesium therefore acts as a reducing agent in this reaction. The O2 molecules, on the other hand, gain electrons from magnesium atoms and thereby oxidize the magnesium.
Answer:
70.6 %
Explanation:
First step, we define the reaction:
2P + 3Br₂ → 2PBr₃
We determine the moles of reactant:
35 g . 1mol / 159.8 g = 0.219 moles
We assume, the P is in excess, so the bromine is the limiting reagent.
3 moles of Br₂ can produce 2 moles of phophorous tribromide
Then, 0.219 moles may produce (0.219 . 2) /3 = 0.146 moles of PBr₃
We convert moles to mass:
0.146 mol . 270.67 g /mol = 39.5 g
That's the 100 % yield reaction, also called theoretical yield. The way to determine the % yield is:
(Yield produced / Thoeretical yield) . 100
(27.9 / 39.5) . 100 = 70.6 %
Answer:
Explanation:
Hydrodistillation is a traditional method for the extraction of bioactive compounds from plants. In this method, plant materials are packed in a still compartment then water is added in sufficient amount and brought to a boil. ... The vapor mixture of water and oil is condensed by indirect cooling with water.
Compaction and cementation
