Solid zinc and aqueous lead (II) nitrate react to from aqueous zinc (II) nitrate and solid lead.

Zn(s) + Pb(NO₃)₂ (aq) → Zn(NO₃)₃ (aq) + Pb (s)

There are two types of chemical reactions that may occur.

single-replacement reactions and double-replacement reactions.

A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds

A + BC ⇒ AC + B

Not all of these reactions can occur. We can use the activity series, which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.

This series is better known as the Volta series, where the metal element with a more negative electrode potential is on the left, while the element with a more positive electrode potential on the right.

The more left the position of a metal in the series, the more reactive metal (easy to release electrons)

Generally, the Volta series used is

Li K Ba Sr Ca Na Mg Al Mn Zn Cr Fe Cd Co Ni Sn Pb H Sb Bi Cu Hg Ag Pt Au

Solid zinc and aqueous lead (II) nitrate react to from aqueous zinc (II) nitrate and solid lead.

Can be expressed in chemical equations :

Zinc + aqueous lead (II) nitrate ⇒aqueous zinc  nitrate + lead metal

Zn(s) + Pb(NO₃)₂ (aq) → Zn(NO₃)₃ (aq) + Pb (s)

Reactants : Zn and Pb(NO₃)₂

Products : Zn(NO₃)₃ and Pb

The existing Zinc element can replace the Lead element, which is on the right side of Zn,  so the reaction will occur.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)