<span>Avogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles.
1 mol </span>Sr3(PO4)2 ( 1 mol Sr2+ / 1 mol Sr3(PO4)2 ) ( 6.022x10^23 ions Sr2+ / 1 mol Sr2+ ) = 6.022x 10^23 <span>Sr2+ ions</span>
Answer:
V' = 1.75 L
Explanation:
glitterfairy9870
6 hours ago
Chemistry
High School
a balloon containing 1,000L of gas at 50. C and 760 mmHg rises to an altitude where the pressure is 380mmHg and the temperature is 10. C, what is the new volume of the balloon (in L)?
PV/T =P'V'/T'
380 XFIRST, ALWAYS ALWAYS, ALWAYS CHANGE TEMP IN C TO TEMP IN K
50C =50+273K =323K
10C= 10+273 =283
now PV/T =P'V'/T')
so
760 X 1/323 = 380 X V'/283
so
V' =760 X1 X283/(323X380)
V' = 1.75 L
L
The mole fraction of the 2.2 molal solution whose solvent is naphthalene is 0.28.
Using the relation;
molality = mole fraction × 1000/MA
Where MA = molar mass of the solvent
We know from the question that the molaity of the solution is 2.2 molal
Making the mole fraction the subject of the formula;
mole fraction = molality × MA/1000
MA = 128 g/mol
mole fraction = 2.2 × 128/1000
Mole fraction = 0.28
Learn more: brainly.com/question/2510654
The only nonmetal
that is liquid at room temperature is the element Br or Bromine. When we say at
room temperature, it means at zero degrees Celsius and at one atmospheric
pressure. The metal that is liquid at room temperature is the element Hg or
mercury.