Answer is B. gas formation
The % composition when 10g of magnesium combine with 4g of nitrogen is 71.43% magnesium and 28.57 % nitrogen
calculation
% composition = mass of an element / total mass x100
mass of magnesium = 10 g
mass of nitrogen = 4g
calculate the total mass used
= 10g of Magnesium + 4 g of nitrogen = 14 grams
% composition for magnesium is therefore = 10/14 x100 = 71.43 %
% composition for nitrogen is therefore = 4 /14 x100 = 28.57 %
Alkali metals have the lowest electronegativities, while halogens have the highest.
Answer:
hello,
first one is 25.15
second is 301.55
Explanation:
honestly if you look up on the internet there is a converter to get you your answers
