Answer:
a) Br-, Kr, Sr2+
Explanation:
plus and minus sort of mean opposite here
Br has 35
Br- has 36
Sr has 38
Sr2+ has 36
Kr has 36
in which of the following sets do all species have the same number of electrons (isoelectronic)?
a) Br-, Kr, Sr2+
b) C, N3-, O2-
c) Mg2+, Sr2+, Ba2+
d) O, O2-, O2+
Mg2+ has 10
Sr2+ has 36
Ba2+ has 54
Br- has 36
Kr has 36
Sr2+ has 36
C has 6
N3- has 10
O2- has 10
O has 8
O2+ has 6
toppr
Answer:
the science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
Explanation:
Mark me as brainiliest
Wear a chemical-resistant apron, chemical-resistant gloves and chemical splash goggles at all times when handling HCl to protect your eyes and skin. Concentrated hydrochloric acid is toxic if inhaled, so avoid breathing it in and always handle it while under a fume hood.
2Al₂O₃ = 4Al + 3O₂
M(A₂O₃)=101.96 g/mol
m(Al₂O₃)=250 g
n(O₂)=3m(Al₂O₃)/{2M(Al₂O₃)}
n(O₂)=3*250/{2*101.96}=3.678 mol
Answer:
The correct answer is option c, that is, osmotic pressure.
Explanation:
The development of the force, which takes place when two solutions exhibiting distinct solute concentrations are distinguished by a semipermeable membrane is known as osmotic pressure. It is the least pressure that is required to be imparted to a solution to inhibit the inward pure solvent flow through a semipermeable membrane.
The flow of solvent molecules via a semipermeable membrane to a region of high solute concentration from a region of low solute concentration, until attainment of equilibrium, is done is termed as osmosis.