Question

name type here date type here
writing chemical formula & balancing chemical equations - slide 15
four coefficients will help balance this equation. drag the correct coefficients set / combination from the options provided below for balancing the equation and drop it in the box
zn + hcl ------> zncl₂ + h₂
1, 3, 2, 1
3, 3, 2, 3
2, 2, 1, 1
2, 4, 2, 1
1, 2, 1, 1
1, 1, 2, 2
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Explanation:

Step1: Count atoms on each side

Reactants: Zn=1, H=1, Cl=1; Products: Zn=1, Cl=2, H=2

Step2: Balance Cl first

Add coefficient 2 to HCl: $\text{Zn} + 2\text{HCl}
ightarrow \text{ZnCl}_2 + \text{H}_2$

Step3: Verify all atoms

Reactants: Zn=1, H=2, Cl=2; Products: Zn=1, Cl=2, H=2. All balanced. Coefficients are 1,2,1,1.

Answer:

1, 2, 1, 1