Tính khối lượng của 2,4 x 1023 KMnO4 và 4,05 x 1025 phân tử Cu(OH)2
Tính thể tích ( Đktc) của 1,56 x 1023 phân tử NO
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(a_1,m_{CaCO_3}=0,25.100=25(g)\\ a_2,m_{SO_2}=\dfrac{3,36}{22,4}.64=9,6(g)\\ a_3,m_{H_2SO_4}=\dfrac{9.10^{23}}{6.10^{23}}.98=147(g)\)
Khối lượng bằng gam của:
- 6,02. 10 23 phân tử nước: 6,02. 10 23 .18.1,66. 10 - 24 = 17,988(g) ≈ 18(g)
- 6,02. 10 23 phân tử C O 2 : 6,02. 10 23 .44.1,66. 10 - 24 = 43,97(g) ≈ 44(g).
- 6,02. 10 23 phân tử C a C O 3 : 6,02. 10 23 .100. 1,66. 10 - 24 = 99,9(g) ≈ 100(g).
\(a.n_{CO_2}=\dfrac{m_{CO_2}}{M_{CO_2}}=\dfrac{4,4}{44}=0,1\left(mol\right)\\ \Rightarrow V_{CO_2}=n_{CO_2}.22,4=0,1.22,4=2,24\left(l\right)\\ n_{O_2}=\dfrac{m_{O_2}}{M_{O_2}}=\dfrac{3,2}{32}=0,1\left(mol\right)\)
\(\Rightarrow V_{O_2}=n_{O_2}.22,4=0,1.22,4=2,24\left(l\right)\)
\(n_{H_2}\) = 2mol
=>\(V_{H_2}\) = 2. 22,4 = 44,8l
\(n_{O_2}\) = 0,0875 mol
=>\(V_{O_2}\) = 0,0875 . 22,4 = 1,96l
\(n_{CO_2}\) = 0,5 mol
=>\(V_{CO_2}\) = 0,5 .22,4 = \(11,2\left(l\right)\)
\(n_{O_2}\) = \(0,2\left(mol\right)\)
=>\(V_{O_2}\) = 0,2 . 22,4 = \(4,48\left(l\right)\)
b) Ta có:
\(n_{NH_3}=\dfrac{6.10^{23}}{6.10^{23}}=1\left(mol\right)\\ n_{O_2}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\\ \Sigma n_{hh}=1+0,5=1,5\left(mol\right)\\ V_{hh}=1,5.22,4=33,6\left(l\right)\)
\(1.m_{Cu}=1,2.64=76,8\left(g\right)\\ 2.m_{NaCl}=1,25.58,5=73,125\\ 3.n_{C_6H_{12}O_6}=\dfrac{7,2.10^{23}}{6.10^{23}}=1,2\left(mol\right)\\ \Rightarrow m_{C_6H_{12}O_6}=1,2.180=216\left(g\right)\\ 4.n_{O_2}=3,6.32=115,2\left(g\right)\\ 5.n_{O_2}=\dfrac{1,2.10^{23}}{6.10^{23}}=0,2\left(mol\right)\\ \Rightarrow m_{O_2}=0,2.32=6,4\left(g\right)\\ 6.n_{N_2}=\dfrac{26,88}{22,4}=1,2\left(mol\right)\\ \Rightarrow m_{N_2}=1,2.28=33,6\left(g\right)\\ 7.n_{CO_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\\ \Rightarrow m_{CO_2}=0,5.44=22\left(g\right)\\ 8.n_{H_2}=\dfrac{31,36}{22,4}=1,4\left(mol\right)\\ \Rightarrow m_{H_2}=1,4.2=2,8\left(g\right)\)
\(1,m_{Cu}=1,2\cdot64=76,8\left(g\right)\\ 2,m_{NaCl}=1,25\cdot58,5=73,125\left(g\right)\\ 3,n_{C_6H_{12}O_6}=\dfrac{7,2\cdot10^{-23}}{6\cdot10^{-23}}=1,2\left(mol\right)\\ \Rightarrow m_{C_6H_{12}O_6}=1,2\cdot180=216\left(g\right)\\ 4,m_{O_2}=3,6\cdot32=115,2\left(g\right)\\ 5,n_{O_2}=\dfrac{1,2\cdot10^{-23}}{6\cdot10^{-23}}=0,2\left(mol\right)\\ \Rightarrow m_{O_2}=0,2\cdot32=6,4\left(g\right)\\ 6,n_{N_2}=\dfrac{26,88}{22,4}=1,2\left(mol\right)\\ \Rightarrow m_{N_2}=1,2\cdot28=33,6\left(g\right)\\ 7,n_{CO_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\\ \Rightarrow m_{CO_2}=0,5\cdot44=22\left(g\right)\\ 8,n_{H_2}=\dfrac{31,36}{22,4}=1,4\left(mol\right)\\ \Rightarrow m_{H_2}=1,4\cdot2=2,8\left(g\right)\)
\(a.\)
\(n_{O_2}=\dfrac{0.15\cdot N}{N}=0.15\left(mol\right)\)
\(m_{O_2}=0.15\cdot32=48\left(g\right)\)
\(V_{O_2}=0.15\cdot22.4=3.36\left(l\right)\)
\(b.\)
\(n_{CO_2}=\dfrac{1.44\cdot10^{23}}{6\cdot10^{23}}=0.24\left(mol\right)\)
\(m_{CO_2}=0.24\cdot44=10.56\left(g\right)\)
\(V_{CO_2}=0.24\cdot22.4=5.376\left(l\right)\)
\(c.\)
\(m_{H_2}=0.25\cdot2=0.5\left(g\right)\)
\(V_{H_2}=0.25\cdot22.4=5.6\left(l\right)\)
\(d.\)
\(m_{CH_4}=1.5\cdot16=24\left(g\right)\)
\(V_{CH_4}=1.5\cdot22.4=33.6\left(l\right)\)
\(e.\)
\(n_{CO_2}=\dfrac{8.8}{44}=0.2\left(mol\right)\)
\(V_{CO_2}=0.2\cdot22.4=4.48\left(l\right)\)
a) \(n_{NaOH}=\dfrac{8}{40}=0,2\left(mol\right)\)
b) \(n_{N_2}=\dfrac{1,8.10^{23}}{6.10^{23}}=0,3\left(mol\right)\)
=> \(m_{N_2}=0,3.28=8,4\left(g\right)\)
c) \(n_{CO_2}=\dfrac{8,8}{44}=0,2\left(mol\right)=>V_{CO_2}=0,2.22,4=4,48\left(l\right)\)
d) \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
=> Số phân tử H2 = 0,15.6.1023 = 0,9.1023
e) \(n_{O_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
f) \(n_{Cl_2}=\dfrac{3,6.10^{23}}{6.10^{23}}=0,6\left(mol\right)\)
=> VCl2 = 0,6.22,4 = 13,44(l)
g) \(n_{O_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
=> mO2 = 0,3.32 = 9,6(g)
h) \(n_{K_2O}=\dfrac{18,8}{94}=0,2\left(mol\right)\)
=> Số phân tử K2O = 0,2.6.1023 = 1,2.1023
i) \(n_{CaO}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
=> Số phân tử CaO = 0,2.6.1023 = 1,2.1023
nHCl = 0,2.1,5 = 0,3 (mol)
=> mHCl = 0,3.36,5 = 10,95(g)
24. 10 23 phân tử H 2 O == 4(mol) phân tử H 2 O
1,44. 10 23 phân tử C O 2 == 0,24(mol) phân tử C O 2 .
0,66. 10 23 phân tử C 12 H 22 O 11 == 0,11(mol) phân tử C 12 H 22 O 11 .
\(a.V_{N_2}=n.22,4=0,25.22,4=5,6\left(l\right)\)
\(b.n_{NH_3}=\dfrac{0,9.10^{23}}{6.10^{23}}=0,15\left(mol\right)\\ V_{NH_3}=n.22,4=0,15.22,4=3,36\left(l\right)\)
\(c.n_{SO_2}=\dfrac{3,2}{64}=0,05\left(mol\right)\\ V_{SO_2}=n.22,4=0,05.22,4=1,12\left(l\right)\)
+ Số mol KMnO4: nKMnO4 = \(\frac{2,4.10^{23}}{6.10^{23}}=0,4\left(mol\right)\)
=> Khối lượng: mKMnO4 = 0,4 x 158 = 63,2 gam
+ Số mol Cu(OH)2: nCu(OH)2 = \(\frac{4,05.10^{23}}{6.10^{23}}=0,675\left(mol\right)\)
=> Khối lượng: mCu(OH)2 = 0,675 x 98 = 66,15 (gam)
+ Số mol NO: nNO = \(\frac{1,56.10^{23}}{6.10^{23}}=0,26\left(mol\right)\)
=> Thể tích NO: VNO(đktc) = 0,26 x 22,4 = 5,824 (lít)