It is beacuse the ions in the melted or aqueous ionic compound is mobile and can freely move through the fluid and conduct electricity.
a. 0.00052 m
Answer: two significant figures.
Explanation:
The zeros to the left of 52 do not count as signficant figures.
Only, 5 and 2 are significant figures.
b. 9.8 x 10⁴ g
Answer: two significant figures.
Explanation:
Both 9 and 8 count as significant figures. Here there are not additional zeros that might confuse you.
c. 5.050 mg
Answer: four significant figures.
Explanation:
The zeros to the right count as signficiant figjres. So here, 5, 0, 5, and 0 are the significant figures.
d. 8700 ml
Answer: two signficant figures.
Explanation:
Since the two zeros to the right are used to determine the place value of 87, you cannot count them as significant figures. Here, only 8 and 7 are significant figures.
The answer is <u>A; compound</u>.
Hope this helps :)
E answer is -60.57 = -60.6 KJ.
CaC2(s) + 2 H2O(l) ---> Ca(OH)2(s) +C2H2(g) H= -127.2 KJ
Hf C2H2 = 226.77
Hf Ca(OH)2 = -986.2
<span>Hf H2O = -285.83
Now,
</span><span>add them up. 226.77 - 986.2 + (2*285.83) = -187.77
</span><span>Add back the total enthalpy that is given in the question
-187.77+127.2 = -60.57
</span>
Answer: The molar volume of any gas at standard pressure and standard temperature is 22.4 liters per mole.
Explanation:The ideal gas law is PV=nRT
P is pressure and if we consider standard pressure, then we have 1.00 atm.
V is volume and that is what we are trying to solve.
n is the number of moles, which is 1.00 moles since we are trying to determine the volume of a gas in one mole.
R is the ideal gas constant which equals
0.0821 (Liters x atmospheres)/(mole x kelvin)
T is the standard temperature which is 273 kelvin.
Rearrange the equation to solve for volume.
V = nRT/P
V = (1.00 mol)(0.0821 L atm/mol K)(273 K)/ 1.00 atm
V = 22.4 L