Answer:
which following give options
atomic mass of magnesium = 24.305
atomic mass of chlorine = 35.453
molecular mass of MgCl2 = 24.305+2*35.453 = 95.211
Number of moles in 338 g of pure MgCl2
= 338/95.211 = 3.55001 moles
Ans. there are 3.55 moles of MgCl2 in 338 g of the substance.
Pretty sure its asteroids but double check to make sure.... hope this helps!
Answer:
A. Increasing the temperature of a chemical reaction speeds up the reaction rate.
Explanation:
The higher the temperature is, the faster a chemical reaction will happen. Food rots slower in refrigerators because it is cold, outside, they rot faster.
Answer:
a) nitrogen
b) nitrogen =5
Oxygen = 6
Fluorine =7
Explanation:
Usually, if we have two or more elements in a compound, the central atom in the compound is the atom having the least value of electro negativity.
If we consider fluorine, oxygen and nitrogen; nitrogen is the least electronegative of the trio hence it should be the central atom of the triatomic molecule.
The number of valence electrons on the valence shell of each atom is shown below;
nitrogen =5
Oxygen = 6
Fluorine =7