What is the gram formula mass (molar mass) of Silicon Tetrabromide? Write the formula first!
267.80 g/mol
107.99 g/mol
347.70 g/mol
187.89 g/mol
Please help it’s worth 50 points

SiBr₄= 347.7 g/mol

Explanation:

Gram formula mass:

Gram formula mass is the atomic mass of one mole of any substance.

It can be calculated by adding the mass of each atoms present in substance.

SiBr₄:

Atomic mass of Si = 28.1 amu

Atomic mas of Br = 79.9 amu

There are four atoms of Br = 79.9 ×4

There is one atom of Si = 28.1 × 1

Gram formula mass of SiBr₄:

SiBr₄ = 79.9 ×4 + 28.1 × 1

SiBr₄= 319.6 + 28.1

SiBr₄= 347.7 g/mol

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