Hello brainly users⚪️⚪️
Calculate the mass of the following:-
1 molecule of sodium
10 molecule of argon
1 molecule of carbon dioxide
1 molecule of H2SO4
➡️ CONTENT QUALITY ⬅️
◾️◾️Answers required from serious users◾️◾️
⚫️⚫️⚫️⚫️⚫️⚫️⚫️⚫️⚫️⚫️
Answers
Answer- First of all, you should be clear with the following formulae:-
1. No. of moles (n)= Given mass (m) ÷ Molar mass (M)
2. No. of moles= No. of particles (N) ÷ N₀
3. No. of atoms/molecules= m÷M × N₀
In this question, we are given the no. of molecules of substances, so we will use the 3rd formula. But first we will find the molar mass.
1) 1 molecule of sodium (Na)
⇒ Molar mass of Na= 1[Na]= 1[23]= 23g
No. of molecules= m÷M × N₀
1= m÷23 × 6.022 ×10²³
1×23÷ 6.022× 10²³= m
∴ m= 3.819× 10⁻²³ g
2) 10 molecules of Argon (Ar)
M of Ar= 10[Ar]= 10[40]= 400 g
No. of molecules= m÷M × N₀
10= m÷400 × 6.022 × 10²³
10 × 400÷ 6.022 × 10²³= m
6.64 × 10⁻¹⁷ g= m
3) 1 molecule of carbon dioxide (CO₂)
M of CO₂= 1[C] + 2[O]= 1[12] + 2[16]= 12+ 32= 44g
No. of molecules= m÷M × N₀
1= m÷44× 6.022 × 10²³
44÷ 6.022× 10²³= m
7.30× 10⁻²³ g= m
4) 1 molecule of H₂SO₄
M of H₂SO₄= 2[H]+ 1[S]+ 4[O]= 2[1]+ 1[32]+ 4[16]= 2+32+64= 98g
No. of molecules= m÷M × N₀
1= m÷ 98 × 6.022× 10²³
98÷6.022 × 10²³= m
1.62 × 10⁻²²g= m
Please mark as the BRAINLIEST answer if helpful.
Answer:
1. 1 molecule of sodium=22.989769 u
2.39.948 u
3.44.01 a.m.u. is the mass of one molecule of CO2 while 44.01 g is the mass of one mole of CO2 (or 6.022 x 1023 molecules of CO2 or [3 x 6.02 x 1023] total number of atoms).
4.total mass of one molecule of H2SO4= mass of two atoms of hydrogen+mass of one atom of sulphur+ mass of four atoms of oxygen = 2+32+64=34+64= 98 u . Here, u stands for atomic mass unit.( or a.m.u). Therefore, Mass of one molecule of H2SO4= 98 u.