Basis of the calculation: 100g
For Carbon:
Mass of carbon = (100 g)(0.80) = 80 g
Number of moles of carbon = (80 g)(1 mole / 12g) = 20/3
For Hydrogen:
Mass of hydrogen = (100 g)(0.20) = 20 g
Number of moles of hydrogen = (20 g)(1 mole / 1 g) = 20
Translating the answer to the formula of the substance,
C20/3H20
Dividing the answer,
CH3
The molar mass of the empirical formula is:
12 + 3 = 15 g/mol
Since, the molar mass given for the molecular formula is 30.069 g/mol, the molecular equation is,
C2H6
ANSWER: C2H6
<span>pH = pKa + log([A^-]/[HA])
[A^-] = [KF] = 0.43 M, [HA] = [HF] = 0.20 M
pKa = -logKa = -log(6.8x10^-4) = 3.17
pH = 3.17+ log(0.43 / 0.20) = 3.50
You can determine the [H3O^+] by using the equation for pH
pH = -log[H3O^+]
[H3O^+] = 10^-pH = 10^-3.50 = 3.16x10^-4 M</span>
Answer:
14,250 years old.
Explanation:
First, multiply the two lifetimes. - 11,400.
Then, divide 5,700 in half for the 0.5 lifetime. - 2,850.
Lastly, add them all up. - 11,400 + 2,850 = 14,250 years old.
sorry if incorrect <3
thats what i understood XD
Answer:
A) mass cannot enter or exit an isolated system
Explanation:
An Isolated system is both insulated and sealed. No matter or energy can neither escape into the surroundings nor enter from the surroundings
Answer:
14 Chromosomes
Explanation:
I looked it up. Hope it helps somewhat :)