Answer : The emperical formula of hydrocarbon is 
.
Solution : Given,
Mass of 
= 11.1 g
Mass of 
= 5.11 g
Step 1 : convert given mass in moles.
Moles of = 
= 
= 0.2522 moles
Moles of = moles of C = 0.2522 moles
Moles of = = 
= 0.2838 moles
Moles of = moles of H = 0.2838 × 2 = 0.5677 moles
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C = 0.2522/0.2522 = 1
For H = 0.5677/0.2522 = 2.25
C : H = 1 : 2.25
To make the ratio as a whole number multiply numerator and denominator by 4.
Ratio of C : H = 
= 4 : 9
The mole ratio of the element is repersented by subscripts in emperical formula.
Therefore, the Emperical formula =
Answer:
The process in which a solid changes directly to a gas is called sublimation. It occurs when the particles of a solid absorb enough energy to completely overcome the force of attraction between them. Dry ice (solid carbon dioxide, CO2) is an example of a solid that undergoes sublimation.
Answer:
Number of moles = 0.31 mol
Explanation:
Given data:
Mass of H₃PO₄ = 30.0 g
Number of moles = ?
Solution:
Formula:
Number of moles = mass/ molar mass
Molar mass of H₃PO₄ = 98 g/mol
Number of moles = 30.0 g / 98 g/mol
Number of moles = 0.31 mol
chemical properties and same number of shell
Explanation:
elements in the same group have the same number of eletrons in their outermost shell and hence have the same chemical properties
It's true
There are thousands of combinations that can be put together to form a all sorts of compounds. That's the whole basis of inorganic chemistry. Organic chemistry is a little bit different. It is more restricted.
