3 years ago

How many formula units of CaO are in 32.7 g of CaO?

Chemistry

1 answer:

max2010maxim [7]3 years ago

7 0

Answer:

3.51× 10²³ formula units

Explanation:

Given data:

Mass of CaO = 32.7 g

Number of formula units = ?

Solution:

First of all we will calculate the number of moles.

Number of moles = mass/molar mass

Number of moles = 32.7 g/ 56.1 g/mol

Number of moles = 0.583 mol

Number of formula units:

1 mole = 6.022 × 10²³ formula units

0.583 mol × 6.022 × 10²³ formula units / 1 mol

3.51× 10²³ formula units

The number 6.022 × 10²³ is called Avogadro number.

You might be interested in

The stationary state with the lowest energy is called the _______.

Olegator [25]

Answer:

Ground state

the state with the smallest amount of energy.

3 0

3 years ago

Which of these acids occurs naturally in the body and performs important regulatory functions? carbonic acid acetic acid magnesi

Svetach [21]

Answer: Carbonic acid occurs naturally in the body and performs important regulatory functions.

Explanation: Carbonic acid ( $H_2CO_3$ ) is an acid formed from the carbon dioxide present in the body. It is also known as the respiratory acid as it helps in the transport of carbon dioxide in the body.

With the help of enzyme Carbonic Anhydrase, carbon dioxide is converted into carbonic acid. This acid is an unstable intermediate which gets dissociated into bicarbonate ions ( $HCO_3^-$ ) and $H^+$ ions. immediatley.