Chloral hydrate (c2h3cl3o2) is a drug formerly used as a sedative and hypnotic.
a. calculate the molar mass of chloral hydrate. b. what amount (moles) of c2h3cl3o2 molecules are in 500.0 g chloral hydrate? c. what is the mass in grams of 2.0 x 10-2 mol chloral hydrate? d. what number of chlorine atoms are in 5.0 g chloral hydrate? e. what mass of chloral hydrate would contain 1.0 g cl? f. what is the mass of exactly 500 molecules of chloral hydrate?

Answer :

(a) The molar mass of is, 165.5 g/mole

(b) The moles of is, 3.02 moles

(c) The mass in grams of mole chloral hydrate is, 3.31 g

(d) The number of chlorine atoms in 5.0 g chloral hydrate is,

(e) The mass of chloral hydrate will be, 1.55 g

(f) The mass of exactly 500 molecules of chloral hydrate is,

Explanation :

(a) To calculate the molar mass of chloral hydrate.

The formula of chloral hydrate is,

Atomic mass of carbon = 12 g/mole

Atomic mass of hydrogen = 1 g/mole

Atomic mass of oxygen = 16 g/mole

Atomic mass of chlorine = 35.5 g/mole

Now we have to determine the molar mass of chloral hydrate.

=2(12g/mole)+3(1g/mole)+3(35.5g/mole)+2(16g/mole)=165.5g/mole[/tex]

The molar mass of is, 165.5 g/mole

(b) Now we have to determine the moles of .

The moles of is, 3.02 moles

(c) Now we have to determine the mass in grams of mole chloral hydrate.

The mass in grams of mole chloral hydrate is, 3.31 g

(d) To calculate the number of chlorine atoms are in 5.0 g chloral hydrate.

First we have to determine the moles of .

Now we have to calculate the number of chlorine atoms in chloral hydrate.

In , there are, 2 carbon atoms, 3 hydrogen atoms, 3 chlorine atoms and 2 oxygen atoms.

As, 1 mole of contains chlorine atoms

So, 0.03 mole of contains chlorine atoms

The number of chlorine atoms in 5.0 g chloral hydrate is,

(e) To calculate the mass of chloral hydrate would contain 1.0 g Cl.

As, of chlorine present in 165.5 g of

So, 1 g of chlorine present in of

The mass of chloral hydrate will be, 1.55 g

(f) To calculate the mass of exactly 500 molecules of chloral hydrate.

As, molecules of chloral hydrate has 165.5 g mass of chloral hydrate

So, 500 molecules of chloral hydrate has mass of chloral hydrate

The mass of exactly 500 molecules of chloral hydrate is,

i believe the answer is true.