Number of proton K=19
so, 42 - 19 =23
then the answer in 19 protons and 23 neutrons
Hey there!:
HCl + MnO2 → MnCl2 + H2O + Cl2
* in HCl the oxidation state of Cl is -1 .
* on the product side the oxidation state is 0 .
* therefore Cl gains electrons .
* in MnO2 the oxidation state of Mn is +4
* in MnCl2 the oxidation state of Mn is +2
Therefore Mn loses electrons
Answer A
Hope That helps!
The answer would be 8 just took the test
You are right sugar is a mixture and salad, water and potassium are all wrong.
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