Một lít rượu 92 độ cân nặng bao nhiêu gam?

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Theo dõi Vi phạm

Hóa học 9 Bài 44 Trắc nghiệm Hóa học 9 Bài 44 Giải bài tập Hóa học 9 Bài 44

Trả lời (1)

Độ rượu\(=\dfrac{V_{rượu}.100}{V_{ddrượu}}\) \(\Rightarrow\)\(V_{rượu}=\dfrac{độrượu.V_{rượu}}{100}\)=\(\dfrac{92.1}{100}\)=0,92 (l)

\(D=\dfrac{m}{V}\Rightarrow m=D.V\)=0,8 . 0,92 = 0,736 (g)

bởi Nguyễn Duy Thông 24/03/2019

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Hòa tan hoàn toàn a (g) CuO cần dùng 200 (ml) dd HCl 0,2M (vừa đủ) thu được dd D. Tính CM của dung dịch D

Xin giúp em với ạ

Hòa tan hoàn toàn a (g) CuO cần dùng 200 (ml) dd HCl 0,2M (vừa đủ) thu được dd D. Tính CM của dung dịch D. Biết V dung dịch coi như không đổi. Nhúng thanh kim loại A hóa trị II vào dung dịch D cho đến khi dung dịch mất màu hoàn toàn, lấy thanh kim loại ra rửa sạch, làm khô và cân lại thấy thanh kim loại tăng 0,8 (g) so với khối lượng ban đầu. Tìm kim loại A. Biết rằng toàn bộ lượng đồng sinh ra đều bám vào thanh kim loại A.

11/12/2022 | 0 Trả lời
Cho 3 kim loại nhôm, bạc, magie. Hãy nêu phương pháp hóa học để nhận biết từng loại

Giúp mình với ạ

Cho 3 kim loại nhôm, bạc, magie. Hãy nêu phương pháp hóa học để nhận biết từng loại

12/12/2022 | 0 Trả lời
Ngâm sắt dư trong 200 ml dung dịch cuso4 0,5M. Sau khi phản ứng kết thúc lọc được chất rắn A và dung dịch B

Giải chi tiết giúp mình với

Ngâm sắt dư trong 200 ml dung dịch cuso4 0,5M. Sau khi phản ứng kết thúc lọc được chất rắn A và dung dịch B

a) Cho A tác dụng với dung dịch hcl dư. Tính khối lượng chất rắn còn lại sau phản ứng

b)Tính thể tích dung dịch naoh 1M vừa đủ để kết tủa hoàn toàn dung dịch B. Lọc kết tủa đem nung ngoài không khí đến khối lượng không đổi, thu được bao nhiêu gam chất rắn

12/12/2022 | 0 Trả lời
So sánh thành phần cấu tạo giữa gang và thép

So sánh giữa gang và thép:

1. Thành phần, cấu tạo

2. Nguyên liệu

3. Nguyên tắc sản xuất

4. Các phản ứng xảy ra trong quá trình sản xuất

13/12/2022 | 0 Trả lời
Cho a gam hỗn hợp kim loại Fe và Cu tác dụng hoàn toàn với 200g dung dịch HCl thu được dung dịch A, 11,2 lít khí H2 ở đktc

Cho a gam hỗn hợp kim loại Fe và Cu tác dụng hoàn toàn với 200g dung dịch HCl thu được dung dịch A, 11,2 lít khí H₂ ở đktc và 5,6 gam chất rắn còn lại sau phản ứng.

a) Tính khối lượng hỗn hợp kim loại bạn đầu

b) Tính nồng độ phần trăm của dung dịch HCl đã dùng là bao nhiêu

21/12/2022 | 0 Trả lời
Ở các lò nung vôi vôi sống (CaO) được sản xuất từ đá vôi theo phương trình hóa học: CaCO3 -> CaO + CO2.

giúp mình với ạ

Ở các lò nung vôi vôi sống (CaO) được sản xuất từ đá vôi theo phương trình hóa học: CaCO₃ -> CaO + CO₂. Cần dùng bao nhiêu gam CaCO₃ để điều chế đc 11,2 gam CaO?

29/12/2022 | 0 Trả lời
Cho 10,8g kim loại M (lll) tác dụng với khí clo dư thu đc 53,4g muối clorua

Cho 10,8g kim loại M (lll) tác dụng với khí clo dư thu đc 53,4g muối clorua

a, xác định kim loại

b, cho 13,5g kim loại trên tan hoàn toàn trong dd HCl 15% tính khối lượng dd tham gia phản ứng

02/01/2023 | 0 Trả lời
Tìm công thức hóa học của X?

X được cấu tạo bởi 2 nguyên là C và H. Tỉ lệ về số mH : mC = 1 : 4. Biết rằng số nguyên tử trong X bằng số nguyên tử trong hợp chất C₂H₄. Tìm công thức hóa học của X?

07/02/2023 | 0 Trả lời
Cho 3,36 lít (đktc) hỗn hợp khí CH4 và C2H4 đi qua bình chứa dung dịch nước brom dư. Sau phản ứng thấy khối lượng bình tăng 1,4 gam. Tính thành phần phần trăm theo thể tích metan trong hỗn hợp

: Cho 3,36 lít (đktc) hỗn hợp khí CH4 và C2H4 đi qua bình chứa dung dịch nước brom dư. Sau phản ứng thấy khối lượng bình tăng 1,4 gam. Tính thành phần phần trăm theo thể tích metan trong hỗn hợp

11/03/2023 | 0 Trả lời
Đốt cháy hoàn toàn 1mol khí axetilen thì cần bao nhiêu lít không khí

Đốt cháy hoàn toàn 1mol khí axetilen thì cần bao nhiêu lít không khí

12/03/2023 | 0 Trả lời
Tính chất vật lý của rượu etylic là

A. Chất lỏng, không màu, nhẹ hơn nước, tan vô hạn trong nước, hòa tan được nhiều chất như iot, benzen, …

B. Chất lỏng, màu hồng, nhẹ hơn nước, tan vô hạn trong nước, hòa tan được nhiều chất như iot, benzen, …

C. Chất lỏng, không màu, không tan trong nước, hòa tan được nhiều chất như iot, benzen, …

D. Chất lỏng, không màu, nặng hơn nước, tan vô hạn trong nước, hòa tan được nhiều chất như iot, benzen, …

16/03/2023 | 1 Trả lời
Công thức cấu tạo của rượu etylic là

A. CH₂-CH₃-OH

B. CH₃-O-CH₃

C. CH₂-CH₂-(OH)₂

D. CH₃-CH₂-OH

17/03/2023 | 1 Trả lời
Đốt cháy hoàn toàn 13,8 gam rượu etylic thu được V lít khí CO2 (đktc). Giá trị của V là

A. 8,84 lít

B. 9,60 lít

C. 10,08 lít

D. 13,44 lít

17/03/2023 | 1 Trả lời
Tính chất hóa học của rượu etylic là

A. Tác dụng với axit axetic

B. Tác dụng với kim loại mạnh như K, Na, …

C. Phản ứng cháy

D. Cả A, B, C đều đúng

16/03/2023 | 1 Trả lời
Độ rượu là

A. Số ml rượu etylic có trong 100 ml hỗn hợp rượu với nước

B. Số ml nước có trong 100 ml hỗn hợp rượu với nước

C. Số gam rượu etylic có trong 100 ml hỗn hợp rượu với nước

D. Số gam nước có trong 100 gam hỗn hợp rượu với nước

16/03/2023 | 1 Trả lời
Khối lượng C2H5OH cần lấy để tác dụng hết với 20 gam kim loại Na là

A. 20 gam

B. 30 gam

C. 40 gam

D. 60 gam

17/03/2023 | 1 Trả lời
Trong phân tử rượu etylic, nhóm nào gây nên tính chất đặc trưng của nó?

A. Nhóm –CH₃

B. Nhóm CH₃-CH₂-

C. Nhóm –OH

D. Cả phân tử

16/03/2023 | 1 Trả lời
Ứng dụng của rượu etylic là

A. Làm nguyên liệu sản xuất axit axetic, dược phẩm, cao su tổng hợp, các loại đồ uống

B. Làm nhiên liệu cho động cơ, nhiên liệu cho đèn cồn trong phòng thí nghiệm

C. Làm dung môi pha vecni, nước hoa

D. Cả A, B, C đều đúng

16/03/2023 | 1 Trả lời
Thể tích khí oxi (đktc) cần dùng để đốt cháy hoàn toàn 11,5 gam rượu etylic nguyên chất là

A. 16,8 lít

B. 20,2 lít

C. 17,8 lít

D. 18,9 lít

17/03/2023 | 1 Trả lời
Muốn điều chế 100 ml rượu etylic người ta dùng

A. 35 ml rượu nguyên chất với 65 ml nước

B. 65 ml rượu etylic nguyên chất hòa với 35 ml nước

C. 100 ml rượu etylic nguyên chất có 65 ml nước

D. 100 ml nước hòa với có 65 ml rượu nguyên chất

16/03/2023 | 1 Trả lời
Rượu etylic được điều chế từ nguồn nào sau đây?

A. Tinh bột

B. Glucozơ

C. Etilen

D. Cả A, B, C đều đúng

16/03/2023 | 2 Trả lời
Cho các phát biểu sau: (1) Trong phân tử rượu etylic có một nguyên tử hiđro không liên kết với nguyên tử cacbon mà liên kết với nguyên tử oxi, tạo ra nhóm –OH.

Cho các phát biểu sau:

(1) Trong phân tử rượu etylic có một nguyên tử hiđro không liên kết với nguyên tử cacbon mà liên kết với nguyên tử oxi, tạo ra nhóm –OH.

(2) Rượu etylic tác dụng với axit axetic thu được este.

(3) Rượu etylic cháy với ngọn lửa màu xanh, tỏa nhiều nhiệt.

(4) Nhiệt độ sôi của rượu etylic cao hơn nhiệt độ sôi của nước.

Số phát biểu đúng là

A. 1

B. 2

C. 3

D. 4

16/03/2023 | 1 Trả lời

ADSENSE

ADMICRO

Một lít rượu 92 độ cân nặng bao nhiêu gam?

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