Answer: 2
Explanation:
To calculate the moles :
According to stoichiometry :
1 mole of 
are produced by = 4 moles of 
Thus 1.18 moles of will be produced by=
of
Mass of 
Thus 85.0 g of will be required and 2 steps are required to get the answer.
I think the answer is:
B. Chemical Change.
I'm not understanding that much. but if i'm right the answer is <span>3.84 x 10^-19 J</span>
Each Be–Cl bond is polar because the two atoms have different electronegativities. The number of outer atoms (2) and lone pairs on the central atom (0) indicate that this molecule has a linear geometry. The bonds in a linear molecule are symmetric, and so their dipoles cancel out.
Each O–H bond is polar because the two atoms have different electronegativities. The number of outer atoms (2) and lone pairs on the central atom (2) indicate that this molecule has a bent geometry. The bonds in a bent molecule are asymmetric, and so their dipoles do not cancel out. In addition, the asymmetric arrangement of the lone pairs on O further contribute to the dipole of this molecule.
An O–O or O=O bond is nonpolar because the two atoms have the same electronegativity. Because there is no overall polarity in O2, the molecule is nonpolar.
Answer:
HCl + Ca(OH)2 = CaCl2 + H2O - Chemical Equation Balancer.
