NaHCO3(s) + HCl(aq) — NaCl(s) + H2011) + CO2 teacher reacts 84.0 g of sodium bicarbonate with excess hydrochloric acid. What is the
percent yield for sodium chloride if 56.0 g of sodium chloride is produced?

it takes on an electronical energy

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b

points

explanation:

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.