Chương 1. Nguyên tử
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Giup minh voi a! Lam duoc bai nao thi tra loi giup minh a! Thong cam vi minh khong danh dau duoc
1) Cho khoi luong cua cac nguyen tu sau, tinh khoi luong nguyen tu moi nguyen to theo don vi u
- Nguyen tu Na (38.10-24g) - Nguyen tu H ( 1,67.10-24g)
2) Cho biet khoi luong nguyen tu cua: Ca la 40u, N la 14u, Fe la 56u. Tinh khoi luong cac nguyen tu tren theo don vi kg
3) Nguyen tu sat gom 26p, 30n, 26e
a. Tinh khoi luong tuyet doi cua nguyen tu sat theo don vi gam
b. Tinh kho...
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Giup minh voi a! Lam duoc bai nao thi tra loi giup minh a! Thong cam vi minh khong danh dau duoc
1) Cho khoi luong cua cac nguyen tu sau, tinh khoi luong nguyen tu moi nguyen to theo don vi u
- Nguyen tu Na (38.10-24g) - Nguyen tu H ( 1,67.10-24g)
2) Cho biet khoi luong nguyen tu cua: Ca la 40u, N la 14u, Fe la 56u. Tinh khoi luong cac nguyen tu tren theo don vi kg
3) Nguyen tu sat gom 26p, 30n, 26e
a. Tinh khoi luong tuyet doi cua nguyen tu sat theo don vi gam
b. Tinh khoi luong electron co trong 1kg sat
4) Biet rang 1 nguyen tu Fe co 26p, 26e 30n va khoi luong mol nguyen tu cua Fe la 56g/mol
a. Hay cho biet 1 mol Fe co bao nhieu gam electron
b. Tinh so nguyen tu Fe co trong 280g sat
c. Tinh khoi luong electron co trong 280g sat
5) Trong 1,5kg dong co bao nhieu gam electron? Cho biet 1 mol nguyen tu dong co khoi luong bang 63,546 gam, mot nguyen tu dong co 29e
6) Tinh khoi luong cua cac nguyen tu sau theo don vi u va kg: Mangan (25p, 30n) va Kali ( 19p, 20n)
7) Gia su nguyen to co kich thuoc nhu Trai Dat ( co ban kinh khoang 6400km) Hay tinh gan dung ban kinh hat nhan cua nguyen tu do
8) Nguyen tu sat co ban kinh nguyen tu la 1,28 angstron va M= 56u. Tinh khoi luong rieng cua nguyen tu Fe theo g/cm3
9) Nguyen tu kem co ban kinh la 1,35.10-1nm, co khoi luong cua nguyen tu la 65u
a. Tinh khoi luong rieng cua nguyen tu kem theo g/cm3? Biet V hinh cau =\(\frac{4}{3}.\pi r^3\)
b. Thuc te hau nhu toan bo khoi luong nguyen tu tap trung o hat nhan voi ban kinh = 2.10-6nm. Tinh khoi luong rieng cua hat nhan nguyen tu kem
10) Khoi luong rieng cua dong la 8,9g/cm3 va nguyen tu khoi cua dong la 64u. Trong tinh the dong thi cac nguyen tu la nhung hinh cau chiem 74% the tich tinh the, phan con lai la cac khe rong. Tinh ban kinh gan dung cua nguyen tu dong
11) Khoi luong rieng cua canxi kim loai la 1,55 g/cm3. Gia thiet rang, trong tinh the canxi cac nguyen tu la nhung hinh cau chiem 74% the tich tinh the, phan con lai la khe rong. Tinh ban kinh nguyen tu canxi tinh theo li thuyet
phan tu mx3 co tong so hat co ban la 196 so hat mang dien nhieu hon so hat khong mang dien la 60.so hat mang dien trong phan tu m it hon trong nguyen tu m it hon trong nguyen tu x la 8. xac dinh m;x va cong thuc phan tu mx3
Cho hh X gom Al, Fe, Cu lay 3,31 g x cho vao HCl du thu duoc 0,784 l H2. Mat khac neu cho 3,31g X vao H2SO4 dac nong du thi thu dc 10,51g hh muoi. Biet rang phan ung xay ra hoan toan tinh tp % ve khoi luong cac chat co trog X
cho 7,2 (g) oxit sat tac dung HCl tao ra 12,7 (g) muối khan ,tim cong thuc
Cho mình hỏi bài này: trong 4,08 gam co bao nhieu phan tu al2o3? bao nhieu nguyen tu Al, bao nhieu nguyen tu O?
Dong trong tu nhien co hai dong vi \(\dfrac{63}{28}\)Cu va \(\dfrac{65}{28}\)Cu voi ti so \(\dfrac{63}{28}Cu\) :\(\dfrac{65}{28}Cu\) la 105:245.vay khoi luong nguyen tu cua dong la:
Ai giup minh phan tu luan voi 
Cho 3g kl thuoc nhom IA thuoc 2 chu ki lien tiep nhau tac dung hoan toan voi 150g h20 sau phan ung thu duoc ddA va ***** khi h2 thoat ra o dktc de trung hoa aaA can 100ml dd h2so4 1m
tim ten nguyen to moi kl va tinh @kl moi kl
tnh gt cua v
Trong ptu m2x co tong so hat p, n, e la 140. Trong do so hat mang dien nhieu hon so hat ko mang dien la 44 hat. So khoi cua m lon hon cua x la 23. Tong so hat p, n, e trong ntu m nhieu hon trong ntu x la 34. Ctpt cua m2x?