Explanation:
Mole percentage of carbon = 
= 
= 6.89
Mole percentage of hydrogen = 
= 
= 17.34
Now, dividing mole percentage of both the atoms by 6.89.
Then, C = 1 and H = 
= 2.5
Hence, empirical formula is 
.
As, it is given that P = 556 mm Hg. Convert mm Hg into atm as follows.
= 0.7316 atm
Volume is given as 158 mL. So, in liter volume is 
equals 0.158 L.
According to ideal gas equation, PV = nRT
molar mass = 58.2 g
Hence, molecular weight of is 
= 29.
Therefore, 
= 58
29 × n = 58
n = 2
Thus, molecular formula of the compound is 
.
Answer:125ml - volume of phosphoic acid
Explanation:
The equation of the reaction is
H3PO4 + 3 NaOH ---> Na3PO4 + 3H2O
Such that I mole of H3PO4 reacts with 3 moles of NaOH to produce the products above.
Given that
M1= Molarity of phosphoric acid = 7.48x10^-2 M
n1= number of moles of phosphoric acid = 1
V1=? ml
M2= Molarity of Sodium hydroxide =0.244 M
V2= volume of sodium hydroxide= 115ml
n2=number of moles of sodium hydroxide = 3
Using the Dilution equation formulae,
M1V1/n1 = M2V2/n2
7.48X10-2 x V1 /1= 0.244M x 115ml/3
V1=0.244Mx115mlx1/0.0748M X 3
V1= 28.06/0.2244= 125.04ml
V1=125.04ml rounded up to 125ml
Yes. It is only through creativity that scientific inquiry exists. Someone had the wacky creative idea that there should be something that is so strong, and inflammable, and just generally amazing like a super... thing! And tadaaah, we have Kevlar. The stuff in bullet proof vests.
False..........
it has so many consequences
