<span>Soil is partially the result of the physical and chemical weathering of its parent rock. The minerals found in the soil were either in that parent rock, or they were formed from the weathering products of the parent rock.</span>
Explanation:
Calcium is the element that has 2 valence electrons.
Thw answer is PHj78 JJ CP30 R2D2
Chlorine (Cl) forms a salt when it is combined with a metal. This element belongs in <span>halogens.
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Answer:
9g
Explanation:
moles O2 = mass / Mr = 12 / 2(16.0) = 0.375
ratio O2 : NO = 5:4
moles NO produced = 0.375 * 4/5 = 0.3
mass NO = Mr * mol = (14.0+16.0) * 0.3 = 9g