Which chemical equation shows that the total mass during a chemical reaction stays the same? A) Mg + Cl2 → MgCl2 B) NaOH + MgCl2
2 answers:
Answer: The correct option is A.
Explanation: Law of conservation of mass states that the total mass in a chemical reaction remains conserved that is total mass on the reactant side will always be equal to the product side.
We are given 4 chemical reactions, the total mass during a chemical reaction will be same in the case of reaction A because total number of atoms on the reactant side is equal to the total number of atoms on the product side.
Mass of Magnesium = 24 g/mol
Mass of Chlorine = 35.5 g/mol
From the above, it is visible that the Total mass during this chemical reaction is same.
All the other reactions are not balanced, therefore the total mass will not be the conserved.
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<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2>
ATOMIC NUMBER: It is the number of protons present in the nucleus of every atom
MASS NUMBER: It is the number of nucleon. Nucleon are the number of proton and neutrons present in the nucleus.
PROTON NUMBER: Proton number equal to the atomic number.
ELECTRON NUMBER: Electron Number is equal to the atomic number.
NEUTRON NUMBER: It is Mass Number - Atomic Number.
CHARGE: It is due to the addition or removal of the electron. + charge when electron removed and - charge when electron is added.
SYMBOL: It is represented as,
Z is Mass Number
A is Atomic Number
<h2>_____________________________________</h2><h2>Worksheet:</h2>(I) ATOMIC NUMBER: 17
MASS NUMBER: 35.5
PROTON NUMBER: 17
ELECTRON NUMBER: 17
NEUTRON NUMBER: 18.5
CHARGE: 0
<h2>_____________________________________</h2>(II) ATOMIC NUMBER: 71
MASS NUMBER: 180
PROTON NUMBER: 71
ELECTRON NUMBER: 71
NEUTRON NUMBER: 109
CHARGE: 0
<h2>_____________________________________</h2>(III) ATOMIC NUMBER: 40
MASS NUMBER: 86
PROTON NUMBER: 40
ELECTRON NUMBER: 38
NEUTRON NUMBER: 46
CHARGE: +2
<h2>_____________________________________</h2>(IV) ATOMIC NUMBER: 92
MASS NUMBER: 238
PROTON NUMBER: 92
ELECTRON NUMBER: 86
NEUTRON NUMBER: 146
CHARGE: +6
<h2>_____________________________________</h2>(V) ATOMIC NUMBER: 82
MASS NUMBER: 206
PROTON NUMBER: 82
ELECTRON NUMBER: 78
NEUTRON NUMBER: 124
CHARGE: +4
<h2>_____________________________________</h2>(VI) ATOMIC NUMBER: 34
MASS NUMBER: 79
PROTON NUMBER: 34
ELECTRON NUMBER: 36
NEUTRON NUMBER: 45
CHARGE: -2
<h2>_____________________________________</h2>(VII) ATOMIC NUMBER: 48
MASS NUMBER: 113
PROTON NUMBER: 48
ELECTRON NUMBER: 49
NEUTRON NUMBER: 65
CHARGE: -1
<h2>_____________________________________</h2>(VIII) ATOMIC NUMBER: 21
MASS NUMBER: 42
PROTON NUMBER: 21
ELECTRON NUMBER: 21
NEUTRON NUMBER: 21
CHARGE: 0
<h2>_____________________________________</h2>(IX) ATOMIC NUMBER:
MASS NUMBER:
PROTON NUMBER:
ELECTRON NUMBER:
NEUTRON NUMBER:
CHARGE:
<h2>_____________________________________</h2>(X) ATOMIC NUMBER: 83
MASS NUMBER: 209
PROTON NUMBER: 83
ELECTRON NUMBER: 80
NEUTRON NUMBER: 126
CHARGE: +3
<h2>_____________________________________</h2>(XI) ATOMIC NUMBER: 47
MASS NUMBER: 108
PROTON NUMBER: 47
ELECTRON NUMBER: 47
NEUTRON NUMBER: 61
CHARGE: 0
<h2>_____________________________________</h2>(XII) ATOMIC NUMBER: 49
MASS NUMBER: 116
PROTON NUMBER: 49
ELECTRON NUMBER: 46
NEUTRON NUMBER: 67
CHARGE: +3
<h2>_____________________________________</h2>(XIII) ATOMIC NUMBER: 53
MASS NUMBER: 128
PROTON NUMBER: 53
ELECTRON NUMBER: 54
NEUTRON NUMBER: 75
CHARGE: -1
<h2>_____________________________________</h2>(XIV) ATOMIC NUMBER: 76
MASS NUMBER: 188
PROTON NUMBER: 76
ELECTRON NUMBER: 72
NEUTRON NUMBER: 112
CHARGE: +4
<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />