What is the mass of 3.50 moles of silicon dioxide (SiO2)? The Periodic Table
O A. 210.3 g
B. 2.11 x 1024 g
C. 4.43 x 1026 g
O D. 3.59

A , 210.3 g

Explanation:

Given data:

Number of moles of SiO₂  = 3.50 mol

Mass of SiO₂ = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of SiO₂ = 60.08 g/mol

by putting values,

3.50 mol = mass/60.08 g/mol

Mass = 3.50 mol × 60.08 g/mol

Mass = 210.3 g

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer