giúp tớ 2 phần này với ạ
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alternatively
symbolizes
hiking
inexperienced
attendances
believable
1D 2A 3D 4C 5B 6B 7B 8A 9A 10B 11B 12C 13D 14A 15D 16C
1.A
2.A
3.A
4.B
5.B
6.C
7.C
8. A
9. C
10. B
11. D
12.A
13. B
14. C
15. A
16. C
\(\left(-2023\right).2024-2023.\left(10-2024\right)\\ =-2023.2024-2023.10+2023.2024\\ =\left(2023.2024-2023.2024\right)-2023.10\\ =0-2023.10=-20230\\ ---\\ 198.246-246.\left(198-19\right)\\ =198.246-246.198+246.19\\ =0-246.19=-4674\\ ---\\ 297.\left(435-24\right)-435.\left(297-24\right)\\ =297.435-297.24-435.297+435.24\\ =\left(297.435-435.297\right)+\left(435.24-297.24\right)\\ =0+\left(435-297\right).24\\ =0+138.24=3312\\ ----\\ \left(-367\right).\left(19-198\right)+198.\left(19-367\right)\\ =-367.19+367.198+198.19-367.198\\ =\left(367.198-367.198\right)+\left(198.19-367.19\right)\\ =0+19.\left(198-367\right)=0+19.\left(-169\right)=-3211\)
Bài 8:
\(n_{Al}=\dfrac{2,7}{27}=0,1\left(mol\right)\)
\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
0,1--->0,15------>0,05---------->0,15
a. \(V_{H_2SO_4}=\dfrac{0,15}{1}=0,15\left(l\right)=150\left(ml\right)\)
b. \(V'=0,15.22,4=3,36\left(l\right)\)
c. \(CM_{Al_2\left(SO_4\right)_3}=\dfrac{0,05}{0,15}=\dfrac{1}{3}M\)
C - A - D - B - A - C
she learnt Math as well as Hoa
eaten noodles for four years
after her mother very much
as good at chemistry as Susan