Question

match the following.
please help its urgent​

Answer 1

Answer and Explanation:

$\diamond$ $\huge \text{\boxed{\mathbb{NUMBER \ OF \ MOLES}}}$

$\implies$ Number of moles is a unit of measurement which is defined as the

6.022 * 10²³

$\implies$ To find the number of moles we have different formulas

$\implies$ The following formula gives us the number of moles :

$\boxed{Number \ of \ moles = \dfrac{Given \ mass}{Molar \ mass}}$

$\boxed{Number \ of \ moles = \dfrac{Number \ of \ particles}{6.022 * 10^{23}}}$

$\boxed{Number \ of \ moles = \dfrac{Volume (in \ litres)}{22.4}}$

$\boxed{Number \ of \ moles = Molarity * Volume(in \ litres)}$

1) 88g of CO₂

$\implies$ Given mass = 88g

$\implies$ Molar mass = 44g

$\implies$ Number of moles = 88 / 44 = 2 moles

2) 6.022 * 10²³ molecules of H₂O

$\implies$ Number of particles = 6.022 * 10²³ molecules

$\implies$ Number of moles = 6.022 * 10²³ / 6.022 * 10²³ = 1 mole

3) 5.6 litres of O₂

$\implies$ Volume of oxygen = 5.6 litres

$\implies$ Number of moles = 5.6 / 22.4 = 1//4 = 0.25 moles

4) 96g of O₂

$\implies$ Given mass = 96g

$\implies$ Molar mass = 32g

$\implies$ Number of moles = 96/32 = 3 moles

5) 1 mole of any gas consists of 6.022 * 10²³ molecules

$\diamond$ Hence the matching scheme will be :

(i) $\rightarrow$ (b) 2 moles

(ii) $\rightarrow$ (c) 1 moles

(iii) $\rightarrow$ (a) 0.25 moles

(iv) $\rightarrow$ (e) 3 moles

(v) $\rightarrow$ (d) 6.022 * 10²³ molecules