Answer:
Oxidation or Exothermic reaction
Explanation:
Oxidation means gain of oxygen.
Exothermic means loss of heat to combine 2 elements
Maybe u should choose D beacause it makes more sense.
that would be physical change cuz your only changing it PHYSICALLY ya know wat im sayin...
a physical change is a change that does not change the composition of the substance. a physical change does not change the molecules of the substance. (they mean the same thing) but no new substance is made from a physical change it stays the same substance as it is...and probably.....always...wooooooo
-exp would be: cutting, tearing, folding, painting, melting, freezing, mixing, and evaporating.
Answer:

Explanation:
Given



Required
Determine the final mass
First we need to determine the total mass after the sample mass is added to an additional sample;



Next, divide the total mass by 3



The final mass is calculated as follows;



<em>Hence, the final mass is 17.560943085g</em>
Answer:
32.7 grams of Zn will remained in the crucible after cooling.
Explanation:
..[1]
..[2]
Adding [1] + 2 × [2] we get:
..[3]
Moles of ZnS in crucible = 0.50 mol
According to reaction [3]. 2 moles of ZnS gives 2 moles of Zn.
Then 0.50 moles of ZnS will give:
of Zn.
Mass of 0.50 moles of Zn =
= 0.50 mol × 65.4 g/mol =32.7 g
32.7 grams of Zn will remained in the crucible after cooling.