Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)

(since the molar mass of Mg is not given, assuming that it's mola mass is 24gmol¯1)

1st find the moles of Mg using the equation n=m/M where

n - moles

m - mass

M - molar mass

Therefore :

n = 0.39375mol

n = 0.39mol

Then using the equation n=V/Vm where;

n = mol

V = volume

Vm = molar volume

Find the volume.

n = V/Vm

(n =0.39mol , Vm = 22.4dm³mol¯¹)

V = 0.39mol×22.4dm³mol¯¹

V = 8.736dm³

The purpose of a switch in a series circuit is to make it easy to open or close the electrical circuit, turning the flow of electricity on or off. A light bulb in a series circuit is used to determine whether or not electricity is flowing.

A <span>heating curve having horizontal plateaus at certain points during the heating process means that the process occurs at increase heating. </span>

Here,

Heat gain by the first sample of water + Heat lost by the second sample of water is equal to zero (0).

Now, Mass of water sample one = 108 g (given)

Mass of water sample two = 66.9 g (given)

Temperature for water sample one =

Let, temperature for water sample two =x

And, final temperature =

Now,

where, = final temperature

= initial temperature

Substitute all the given values in above formula:

[tex x =84.81^{0}C [/tex]