Some transition metals form more than one type of ion. How are these ions distinguished from one another in writing formulas for compounds? using Roman numerals

using Latin prefixes

using numerical superscripts

using Arabic numerals

HELP

Using Roman numerals

Explanation:

Distinguishing between the ions of a transition metal in writing involves the use of roman numerals.

A popular case to look at is the element iron.

There are two popular ions of iron. These are the iron 2 and the iron 3 ions

While they differ physically, they can also be differentiation writing.

Iron 3 is written as Fe3+ While Iron 2 is written as Fe2+

Thus, we can write their tetraoxosulphates vi salt name as follows;

For iron ii, we have iron (ii) textraoxosulphate vi while for iron iii, we have iron (iii) tetraoxosulphate vi.

Thus, the use of the roman numerals has helped us in distinguishing between the two types of ions of the same iron

it is the second option.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.