Question

any mods please help​

Answer 1

Answer:

Explanation:

i).

3 moles of H2

=3×2

=6. 0 grams.

ii).

5 moles of NaoH

No of moles = Given mass/molecular mass

5 = x/40

x = 200 grams...

iii).

mass of ch3c00h

No of moles = Given mass/molecular mass

2 = x/60

x = 120 grams

Answer 2

CONCEPT :-

• In all the 3 parts we are provided with the moles of the molecules and compounds and we are asked to find their mass.
• First of all, we'll be calculating the, molar mass of the compound/molecule and will then multiply it with the given no. of moles to find the total no. of mass present in that particular quantity.

We know that :-

$\\ \leadsto \underline{ \boxed{ \sf mass \: = moles \times molar \: mass }} \bigstar$

With the help of this formula, we shall find the mass of all the compounds and molecules.

$\\ \quad \dag\underline{ \sf Answer \: 1 :- }$

・Moles of hydrogen = 3

・Molecular weight of hydrogen = 2 g

→ Mass = 3 × 2 = 6g

$\\ \quad \dag\underline{ \sf Answer \: 2 :- }$

・Moles of NaOH = 5

・Molecular weight of NaOH = 23 + 16 + 1 = 40 g

→ Mass of 5 Moles of NaOH = 5 × 40 = 200 g

$\\ \quad \dag\underline{ \sf Answer \: 3 :- }$

・Moles of $\sf CH_{3}COOH$ = 2

・ Molecular weight = 2 × 12 + 4 + 2 × 16 = 60 g

→ Mass of 2 moles = 2 × 60 = 120 g

_________________________

Hope it helps!!