Potassium permanganate (kmno4) reacts with hydrochloric acid (hcl) to form potassium chloride (kcl), manganese chloride (mncl2), water (h2o), and chlorine gas (cl2). the balanced chemical equation is 2kmno4 + 16hcl → 2kcl + 2mncl2 + 8h2o + 5cl2. select the correct ratios of each of the following substances.

Balanced chemical reaction:

2KMnO₄ + 16HCl → 2KCl + 2MnCl₂ + 8H₂O + 5Cl₂.

1) According to balanced chemical reaction:

n(KMnO₄) : n(KCl) = 2 : 2 (1 : 1).

Two molecules of potassi chloride are formed from two molecules of potassium permanganate.

2) According to balanced chemical reaction:

n(HCl) : n(H₂O) = 16 : 8 (2 : 1).

3) According to balanced chemical reaction:

n(KMnO₄) : n(Cl₂) = 2 : 5.

4) According to balanced chemical reaction:

n(HCl) : n(MnCl₂) = 16 : 2 (8 : 1).

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.