Sand (silicon dioxide) and coke (carbon) are combined to form silicon carbide (SiC), a compound used in high-strength ceramic materials. What mass of silicon carbide will be produced from the reaction of 352 g silicon dioxide?

Mass = 235 g

Explanation:

Given data:

Mass of SiO₂ react = 352 g

Mass of silicon carbide formed = ?

Solution:

Chemical equation:

SiO₂ + 3C    →     SiC + 2CO

Number of moles of SiO₂:

Number of moles = mass/ molar mass

Number of moles = 352 g/ 60.08 g/mol

Number of moles = 5.86 mol

Now we will compare the moles of SiO₂ with SiC from balance chemical equation.

                    SiO₂          :            SiC

                      1               :             1

                    5.86           :          5.86

Mass of SiC:

Mass = number of moles × molar mass

Mass = 5.86 mol × 40.11 g

Mass = 235 g

increased stability in the completion of fluorine's outer shell.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml