Q2 Make Up Assignment

Front

What is the balanced equation for S4 + F4?

Back

1 S4 + 1 F4 -> 4 SF

Front

How many atoms are in a mole of iodine?

Back

6.02 x 10^23

Front

What is the pH value of a neutral solution at 25°C?

Back

7

Front

What is the empirical formula for N2S3?

Back

N2S3

Front

Is MgF2 soluble in water?

Back

False

Front

Define a mole in chemistry.

Back

A mole is a unit that measures the amount of substance, equivalent to 6.02 x 10^23 particles.

Front

What is the significance of the pH scale?

Back

The pH scale measures the acidity or basicity of a solution, with 7 being neutral.

Front

What does it mean for a compound to be soluble in water?

Back

A soluble compound can dissolve in water to form a homogeneous solution.

Front

What is the formula for calculating the number of moles?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the difference between empirical and molecular formulas?

Back

Empirical formula shows the simplest ratio of elements, while molecular formula shows the actual number of atoms.