Answer:
Explanation:
Volume is the space occupied by an object. A cube has edges/sides of equal length. Its volume can be calculated by
Volume = side * side * side
= 11.4 cm * 11.4 cm* 11.4 cm
= 1442.556 cm3
A H₂ molecule is represented as follows:
H-H, Here two hydrogen atom that is H are connected by a single bond that is represented by -.
But here it is given as H-H-, there is presence of an extra bond that is shown after the attachment of two H atoms. So that is wrong in this structure, that is the presence of extra - bond . The wrong thing over here is only that presence of extra bond -.
Al + H2SO4 = Al2(SO4)3 + H2 single replacement
We still need to balance it though al needs a 2
2Al + H2SO4 = Al2(SO4)3 + H2
SO4 needs a 3 so
2Al + 3H2SO4 = Al2(SO4)3 + H2
now the H on the right needs a 3 to be equal to left h's 6
2Al + 3H2SO4 = Al2(SO4)3 + 3H2
Balanced.
C5H12 + O2 = H2O + CO2 double replacement
so we need 5 c so
C5H12 + O2 = H2O + 5CO2
now we need 6 h's to equal left h's 12
C5H12 + O2 = 6H2O + 5CO2
the left O needs an 8 to equal right side
C5H12 + 8O2 = 6H2O + 5CO2
Balanced
The molar mass (atomic weight ) of sodium is 23.0 grams/mole and the molar mass of sodium azide, NaN3 , is the mass of sodium, 23.0 gram/mole added to the molar mass of three atoms of nitrogen (14.0 x 3 = 42 gram/mole) which equals 65.0 grams/mole. The percentage of sodium is 23.0 /65.0 x 100 % = 35 %
