Đáp án: $2:3:1:6$
Giải thích các bước giải:
$2Na_{3}PO_4$ + $3Ca(OH)_{2}$ $\buildrel{{}}\over\longrightarrow$ $Ca_{3}(PO_4)_2$ + $6NaOH_{}$
Đầu tiên là cân bằng theo nhóm $PO_4$ ; $OH$. Xong cân bằng các nguyên tố còn lại $(Na$ và $Ca)$
2Na3PO4 + 3Ca(OH)2 -> Ca3(PO4)2 + 6NaOH
Giúp vs mọi người.Thank mọi người
Cho Δ ABC, ∠A = 90°, AH ⊥ BC (H ϵ BC) ,AB = 6cm , AC = 8cm. a) Tính BC,HA,HB,HC b) Tia phân giác ∠BAC cắt BC tại D.Tính diện tích ABD
Mn giúp mk bài này nhanh với!!!
CHO B= (1/4-1)(1/9-1)...(1/100-1). SO SÁNH B VỚI -11/21 NHANHH MÌNH VOTE CHO
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Vẽ bt21 ít nhất 3 con nhé !!!!!!!!!!!!!!!!!!!!!!!!!
Bài 72 trang 88 SBT Toán 8 Tập 1: Cho góc nhọn xOy, điểm A nằm trong góc đó. Dựng điểm B thuộc tia Ox, điểm C thuộc tia Oy sao cho tam giác ABC có chu vi nhỏ nhất. thêm 1 acc lol cấp cao ko cài sdt và ko khóa
thực hiện phép tính bằng cách thuận tiện nhất nếu có thể a) 50% + 7/12 - 1/2 b )2014 x 65 + 2014 x 45 - 2014 x 10 c) 125 - 25 : 3 x 12 d ) ( 2013 x 2014+ 2014 x 2015 + 2015 x 2016 ) x ( 1+ 1/3 - 1 1/3 ) < cái này là hỗn số > e) 17,75 + 16 , 25 + 14,75 + 13 ,25 + ..... + 4,25 + 2,75 + 1,25 mong mọi người giúp mình giải các bài toán này ~~~~~~~~~~~ nhé ~~~~~~~~~~~~~~~~~~~~~~~~~~~
I. Give the correct form the verbs in the blankets. 1) I am interested in ( play ) ......... computer games and I ( play ) ........... very often, so I ( learn ) ............ very badly. My parents and teachers ( be ) ............. unhappy. 2) There ( be ) ........... many trees and flowers in our small garden. They ( be ) ......... very beautiful. 3) Duong usually ( get ) ............ up at 5:30 in the morning, she ( have ) ............ breakfast at 6:00 and ( go ) .......... to school at 6:45. 4) We ( not play ) ........... soccer at the moment. We ( watch ) .......... the cartoon " Tom and Jerry " on VTC7, it be very interesting ang I ( like ) ................ i very much. 5) What can you ( do ) ............. if you lose the game ? - Oh, I can ( do ) ..........nothing but I may (cry ) ............ 6).............. Your father ( watch ) ............... television everyday? - No, he ( be ) ............. always busy in the evening.
disappointed/ embarrassed /frustrated /tired /worried /angry / bored / confident / confused/ delighted 1-I feel ______.I don't have anything to do. 2-Janet is _______because she doesn't know if she got an F or an A in her test . 3-I feel so __________because i've worked all night. 4-The headmaster was very________with Tom because of his bad behavior at school. 5-The students felt __________because they couldn't go camping. 6-Bob looks depressed and_________________.He's constantly singing and complaining . 7-Paul was _______when he heard his song on the radio. 8-Mum is _________because my sister hasn't come home yet. 9-Phuong is ___________that he will pass the examination. 10-Peter felt ____________when he was treated in front of some girls . MN LÀM NHANH GIÚP EM VS Ạ,EM VOTE 5S CHO NGƯỜI LÀM NHANH Ạ
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