5. 5
19
Answer the following questions from the given table.
ELEMENT
MASS NUMBER
ATOMIC
NUMBER
A
14
7
В.
9
C С
20
10
D
23
E
9
4
i) How many electrons are present in E?
ii) Which is an inert gas?
iii) Which element has valency of 3?
iv) How many neutrons are present in D?
iv) Which element will form a cation with one positive charge?​

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?