Answer:
D. Dense, conducts electricity, high melting point, giant structure, brittle
Explanation:
Graphite is an allotrope of carbon. It is similar to diamond except for some differences in their properties and mode of formation.
Graphite is typically a non-metal and should have properties of non-metals. Metals are malleable, ductile, conducts electricity, etc.
Graphite is able to conduct electricity because of the presence of free mobile electrons in its structure.
It is dense but its density is lower than that of diamond but higher than water.
Graphite is brittle with a high melting point which is close to that of diamond.
Answer:D - adding a catalyst
Explanation:
Matter can only me transformed, but not created or destroyed.
one mole of P weights about 31 grams
in one mole there are 6.022*10^23 atoms
we use the rule of threes
6.022*10^23atoms......weight..........31 grams
3.45*10^23 atoms.........weight...........x grams
x=(3.45*10^23*31)/6.022*10^23
x=106.95/6.022=<u><em>17.76 grams</em></u>
The molar mass of B(NO₃)₃ - Boron nitrate : 196.822 g/mol
<h3>Further explanation</h3>
In stochiometry therein includes
<em>Relative atomic mass (Ar) and relative molecular mass / molar mass (M) </em>
So the molar mass of a compound is given by the sum of the relative atomic mass of Ar
M AxBy = (x.Ar A + y. Ar B)
The molar mass of B(NO₃)₃ - Boron nitrate :
M B(NO₃)₃ = Ar B + 3. Ar N + 9.Ar O
M B(NO₃)₃ = 10.811 + 3. 14,0067 + 9. 15,999
M B(NO₃)₃ = 196.822 g/mol