Answer:
A) endothermic; ΔH > 0;Δ S > 0
Explanation:
Since temperature falls => system absorbs heat
=> reaction is endothermic
Since reaction is endothermic => Delta H is positive (+)
Since reaction is spontaneous, Delta G = Delta H - T x Delta S is negative
Since Delta G is negative, Delta H is positive and T is positive
=> Delta S is positive (+)
Answer: -
Molar mass of ferrous ammonium sulfate =392 g / mol
Mass of iron present in ferrous ammonium sulfate = 56 g/mol
Total mass required = 0.2 g
Total mass of iron Fe required = 10% of 0.2 g
= 
x0.2
= 0.02 g
Only ferrous ammonium sulfate has iron. So all iron must be present only as ferrous ammonium sulfate.
56 g of iron is present in 392 g of ferrous ammonium sulfate
0.02 g of iron is present in 
x 0.02
= 0.14 g
Mass of ammonium sulfate = 0.2 - 0.14 = 0.06 g
Thus the required composition must be 0.06 g ammonium sulfate and 0.14 g ferrous ammonium sulfate.
Answer:
Idek I came for the same reason
Explanation:
Cl₂ is a compound
<h3>Further explanation</h3>
Pure substance can be any element or compound
Elements if composed of one atom
A compound if it is composed of two or more atoms, either of the same type or of different types
Cl₂ consists of 2 Cl atoms.
Cl with 7 valence electrons will try to get its stability by binding 1 more electron, by covalently bonding with other Cl atoms to form a Cl₂ compound in the form of a gas
Im sorry but Chapter 2 test chemistry doesnt sound much like a question can you be more specific thanks ik u can be more specififc!
