
Here's the balanced equation for given Double displacement reaction ~

The products fored are : Lead Iodide ( PbI2 ) and Potassium Nitrate ( KNO3 )
20 grams is probably the mass
They have the same density because a material, no matter how much of it there is, will always be a certain density. A 40g ball of iron has the same density as a 1g ball of iron.
Answer:
a. physical features
Explanation:
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{and my biology teacher is <u><em>awesome</em></u> ❌}