Answer:
k
Explanation:
They must obey the Law of Conservation of Mass that states that matter cannot be created or destroyed, it is conserved. Atoms are never lost or gained in chemical reactions, they are rearranged. The mass of the reactants must equal the mass of the products.
To find the mass you you need multiply its volume by its density.
6 cm^3 • 2.76 g/cm^3 = 16.56 g
Answer:
x = 130 Ms⁻¹
Explanation:
The equation is:
x = (2.4 x 10³ M⁻²s⁻¹)(0.38 M)³
The expression raised to the power of 3 is simplified:
x = (2.4 x 10³ M⁻²s⁻¹)(0.054872 M³)
The two values are multiplied together and units canceled:
x = 130 Ms⁻¹
Explanation:
Correct option is
B
18
As reaction for the formation of Al 2
is as follows:
4Al+3O
2
→Al 2
O
this shows that 4 mol reacts to 3 mol ( 96 g) of O
2
so as 3 mol O
2
to 4 mol Al
then 0.5 mol O 2 to 3, 4
×0.5=0.66 mol of Al
as 1 mol Al = 27 g
then 0.66 mol of Al=0.66×27=17.9 g≈18 g
Hence, the correct option is B.