Answer:
C₄H₂N₂
Explanation:
First we<u> calculate the moles of the gas</u>, using PV=nRT:
P = 2670 torr ⇒ 2670/760 = 3.51 atm
V = 300 mL ⇒ 300/1000 = 0.3 L
T = 228 °C ⇒ 228 + 273.16 = 501.16 K
- 3.51 atm * 0.3 L = n * 0.082atm·L·mol⁻¹·K⁻¹ * 501.16 K
Now we<u> calculate the molar mass of the compound</u>:
- 2.00 g / 0.0256 mol = 78 g/mol
Finally we use the percentages given to<em> </em><u>calculate the empirical formula</u>:
- C ⇒ 78 g/mol * 61.5/100 ÷ 12g/mol = 4
- H ⇒ 78 g/mol * 2.56/100 ÷ 1g/mol = 2
- N ⇒ 78 g/mol * 35.9/100 ÷ 14g/mol = 2
So the empirical formula is C₄H₂N₂
Answer:
Metals are good conductors of heat and electricity, and are malleable (they can be hammered into sheets) and ductile (they can be drawn into wire). Most of the metals are solids at room temperature, with a characteristic silvery shine (except for mercury, which is a liquid). Nonmetals are (usually) poor conductors of heat and electricity, and are not malleable or ductile; many of the elemental nonmetals are gases at room temperature, while others are liquids and others are solids.
Explanation:
Answer:
The electronic configuration uses the principle of the K,L,M,N shells to arrange electrons in the shells of elements. The K shell which is the first shell can only accommodate two electrons while the rest shells can accommodate a maximum of 8 electrons. Metals and nonmetals have atomic numbers which tells us the amount of electrons they contain in their neutral state.
For example the metal Sodium (Na) has an atomic number of 11.The electronic configuration will be; 2,8,1 .
The non metal Chlorine has an atomic number of 17. The electron configuration will be 2,8,7
The valence shell refers to the last shell of an atom.
We can see from the electronic configurations that sodium has 1 electron in its valence shell, while chlorine has 7 electrons in its valence shell. Generally non-metals gain electrons because of the large number of electrons in their valence shell and metals lose electrons due to the fewer number of electrons in their valence shell
Dwarf planets have not cleared other objects out of their orbital paths