Ionic bonds hold NaCl together
Evaporation!
-Melting is a solid to a liquid
-sublimation is directly from a solid to a gas
-condensation gas to liquid
So, Ba is divalent. This means that each Ba(OH)2 requires two I in order to produce one BaI2 molecule.
The two hydrogens from the 2 HI molecules will combine with 2 OH of Ba(OH)2 forming 2 water (H2O) molecules.
The equation which illustrates this reaction in as follows:
<span>2 HI (aq) + Ba(OH)2 (s) ........> BaI2 (aq) + 2 H2O (l)
</span>where:
aq refers to aqueous state
s refers to solid state and
l refers to liquid state.
Answer:
5.67x10²³ ions
Explanation:
By looking at the molecular formula, we can tell that there are three Sr²⁺ ions per Sr₃(PO₄)₂ molecule.
We <u>convert Sr₃(PO₄)₂ moles into Sr₃(PO₄)₂ molecules</u> by using<em> Avogadro's number</em>:
- 0.314 moles * 6.023x10²³ = 1.89x10²³ molecules
Finally we <u>multiply that number by 3</u> in order to <em>convert Sr₃(PO₄)₂ molecules to Sr²⁺ ions</em>:
- 1.89x10²³ * 3 = 5.67x10²³ ions.
The STP is Standard temperature and pressure.
Standard temperature is defined as zero degrees Celsius (0° C)
Standard pressure supports 760 millimeters in a mercurial barometer (760 mmHg)
we have that
760 mmHg= 1 atm
therefore
the answer is 0 deg C and 1 atm.
