the anwser would most likely be j=0
Answer:
to watered our source of food
the "PLANTS & TREES"
56 cm

because 1 cm

=1mL
2200000 mg because 1 kg = 1000 mg
2.2 km because 1000 m = 1km
"Kilo" means 1000.
The H+ will react with Magnesium to release hydrogen Gas under the equation Mg + 2H+ --> Mg(2+) + H2(g)
Hope this Helps! :)
Answer:
: Pure substance, Element
: Pure substance , Element
: Pure substance, Compound
Explanation:
Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example:
and 
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: 
Heterogeneous Mixture : Mixture that has its different components mixed unevenly within the substance
. Example: Air
Homogeneous Mixture : Mixture that has its different components mixed evenly within the substance. Example: sugar dissolved in water