Answer:
One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.
Explanation:
Answer:
16.4moles
Explanation:
From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 atoms.
This clearly indicates that 1mole of (NH4)3PO4 also contains 6.02x10^23 atoms.
Now, if 1mole of (NH4)3PO4 contains 6.02x10^23 atoms,
Then Xmol of (NH4)3PO4 will contain 9.87X10^24 atoms i.e
Xmol of (NH4)3PO4 = 9.87X10^24/6.02x10^23 = 16.4moles
Answer:
Part A → 7.82 atm
Part B → The unknown solution had the higher concentration
Part C → 0.83 mol/L
Explanation:
Part A
Osmotic pressure (π) = M . R. T . i
NaCl → Na⁺ + Cl⁻ (i =2)
0.923 g of NaCl must be dissolved in 100 mL of solution.
0.923 g / 58.45 g/m = 0.016 moles
Molarity is mol/L → 0.016 m / 0.1L = 0.16M
π = 0.16M . 0.08206 L.atm/molK . 298K . 2 ⇒ 7.82atm
Part. B
The solvent moves toward the solution of higher concentration (to dilute it) until the two solutions have the same concentration, or until gravity overtakes the osmotic pressure, Π. If the level of the unknown solution drops when it was connected to solution in part A, we can be sure that had a higher concentration.
Part. C
π = M . R . T
20.1 atm = M . 0.08206 L.atm/mol.K . 294K
20.1 atm / (0.08206 L.atm/mol.K . 294K) = 0.83 mol/L
Answer:
i guess oil never dissolve in water. As like dissolve like. water is polar so it dissolves only polar substances
Explanation:
The correct option is D.
Engineers and constructions workers have different types of footwear, which they make use of when they are in the field. Each of these foot wears has its own purpose and functions. For instance, the steel toe boots serve to protect the foot from falling falling objects and also from compression. The foot wear has a protective support in the toe and also possesses a mid sole plate to protect the foot again puncture from the sole.
