Install gam
Author: l | 2025-04-24
Getting Started with GAM: Installation and Configuration. To harness the power of GAM, the first step is to install it on your local machine. GAM is available for Windows, Linux Download GAM, then run the MSI installer.By default, GAM will install to C: GAM but you can change this to wherever you prefer. GAM will also be added to your path so you can run GAM even if you're not in the GAM folder. At the end of the MSI install process, GAM will open a command prompt to allow you to setup a project and authorize GAM for admin management
Install GAM as Python Library GAM-team/GAM Wiki - GitHub
Why can't I install El Chavo Kart: Kart racing gam?The installation of El Chavo Kart: Kart racing gam may fail because of the lack of device storage, poor network connection, or the compatibility of your Android device. Therefore, please check the minimum requirements first to make sure El Chavo Kart: Kart racing gam is compatible with your phone.How to download El Chavo Kart: Kart racing gam old versions?APKPure provides the latest version and all the older versions of El Chavo Kart: Kart racing gam. You can download any version you want from here: All Versions of El Chavo Kart: Kart racing gamWhat's the file size of El Chavo Kart: Kart racing gam?El Chavo Kart: Kart racing gam takes up around 418.9 MB of storage. It's recommended to download APKPure App to install El Chavo Kart: Kart racing gam successfully on your mobile device with faster speed.What language does El Chavo Kart: Kart racing gam support?El Chavo Kart: Kart racing gam supports isiZulu,中文,Việt Nam, and more languages. Go to More Info to know all the languages El Chavo Kart: Kart racing gam supports. IntroductionRequirementsInstallation - First time GAM7 installationInstallation - Upgrading from Legacy GAMIntroductionGAM7 is a free, open source command line tool for Google Workspace Administrators to manage domain and user settings quickly and easily.This page provides simple instructions for downloading, installing and starting to use GAM7.GAM7 requires paid, or Education/Non-profit, editions of Google Workspace. G Suite Legacy Free Edition has limited API support and not all GAM commands work.GAM7 is a rewrite/extension of Jay Lee's Legacy GAM, without his efforts, this version wouldn't exist.GAM7 is backwards compatible with Legacy GAM, meaning that if your command works with Legacy GAM, it will also work with GAM7. There may be differences in output, but the syntax is compatible.DocumentationDocumentation for GAM7 is hosted in the GitHub Wiki and in Gam*.txt files.Mailing List / Discussion groupThe GAM mailing list / discussion group is hosted on Google Groups. You can join the list and interact via email, or just post from the web itself.Chat RoomThere is a public chat room hosted in Google Chat. Instructions to join.Source RepositoryThe official GAM7 source repository is on GitHub in the master branch.AuthorGAM is maintained by Jay (James) Lee and Ross Scroggs. Please direct "how do I?" questions to Google Groups.RequirementsTo run all commands properly, GAM7 requires three things:An API project which identifies your install of GAM7 to Google and keeps track of API quotas.Authorization to act as your Google Workspace Administrator in order to perform management functions like add users, modify group settings and membership and pull domain reports.A special service account that is authorized to act on behalf of your users in order to modify user-specific settings and data such as Drive files, Calendars and Gmail messages and settings like signatures.Installation - First time GAM7 installationUse these steps if you have never used any version of GAM in your domain. They will create a GAM projectand all necessary authentications.Download: Downloads-InstallsConfiguration: GAM7 ConfigurationInstall: How to Install Advanced GAMInstallation - Upgrading from Legacy GAMUse these steps if you have used any version of Legacy GAM in your domain. They will update your GAM projectand all necessary authentications.Download: Downloads-InstallsConfiguration: GAM7 ConfigurationUpgrade: How to Upgrade from Legacy GAMYou can install multiple versions of GAM and GAM7 in different parallel directories.Downloads Installs GAM-team/GAM Wiki - GitHub
G/ml). Vậy thể tích H2SO4 cần dùng tối thiểu là: A. 21,1 ml B. 21,5 ml C. 23,4 ml D. 19,6 mlLời giải:Chọn đáp án: BGiải thích: mO = moxit - mkim loại = 4,66 - 3,86 = 0,8g nO = 0,8/16 = 0,05 mol nO = 2nH+ = nH2SO4 = 0,05 mol=> V = (0,05. 98. 100)/(20. 1,14) = 21,5 mlCâu 5: Cho tan hoàn toàn 58 gam hỗn hợp gồm Fe, Cu, Ag trong dung dịch HNO3 2M thu được 0,15 mol NO; 0,05 mol N2O và dung dịch D. Cô cạn dung dịch D, khối lượng muối khan thu được là: A. 120,4 gam B. 89,8 gam C. 116,9 gam D. 110,7 gamLời giải:Chọn đáp án: DGiải thích: mmuối khan = mFe, Cu, Ag + mNO3-Có: nNO3- = 3.nNO + 8.nN2O = 3. 0,15 + 8. 0,05 = 0,85 molmmuối khan = 58 + 0,95. 62 = 110,7 (g)Câu 6: Khi cho 100 g hợp kim gồm có Fe, Cr và Al tác dụng với lượng dư dung dịch NaOH thu được 6,72 lít khí. Lấy bã rắn không tan cho tác dụng với một lượng dư dung dịch HCl (khi không có không khí) thu được 38,08 lít khí. Các thể tích đo ở đktc. Xác định thành phần % của hợp kim.Lời giải:Giải thích: Các phương trình hóa học: 2Al + 2NaOH → 2NaAlO2 + 3H2 (1) z 3z/2Phần không tan là Fe và Cr Fe + 2HCl → FeCl2 + H2 (2) x x Cr + 2HCl → CrCl2 + H2 (3) y ynH2 (1) = 6,72/22,4 = 0,3 molSố mol H2 (2), (3): nH2 (2), (3) = 38,08/22,4 = 1,7 molGọi x, y, z lần lượt là số mol của Fe, Cr, AlTheo bài ra ta có hệ phương trình.Thành phần % theo khối lượng của hỗn hợp là: %mFe = (1,55.56)/100. 100% = 86,8% %mCr = (0,15.52)/100. 100% = 7,8% %mAl = 100% - (86,8% + 7,8%) = 5,4%Câu 7: Cho 13,33 gam hỗn hợp Al, Cu, Mg tác dụng với dung dịch H2SO4 loãng dư thu được dung dịch A, 7,728 lít khí (đktc) và 6,4 gam chất rắn không tan. Cô cạn dung dịch A thu được bao nhiêu gam muối khan? A. 40,05 gam B. 42,25 gam C. 25,35 gam D. 46,65 gamLời giải:Chọn đáp án: AGiải thích: nH2SO4 = nH2 = 0,345 molmAl + mMg = 13,33 – 6,4 = 6,93g=> mmuối = mAl + mMg + mSO42- = 40,05 gamCâu 8: Cho 29 gam hỗn hợp Mg, Zn, Fe tác dụng hết với dung dịch H2SO4 loãng thấy thoát ra V lít khí (đktc). Cô cạn dung dịch sau phản ứng thu được 86,6 gam muối khan.. Getting Started with GAM: Installation and Configuration. To harness the power of GAM, the first step is to install it on your local machine. GAM is available for Windows, LinuxChrome OS Installation GAM-team/GAM Wiki - GitHub
The extent allocation comes in as the GAM tracks when SQL Server needs to allocate a uniform extent.An extent in SQL Server is comprised of 8 x 8KB pages, 64KB, and this is usually the unit of data allocation so if you have a table that’s larger than eight pages, any time we allocate space to that table we will create a full extent, and this is a uniform extent because all eight pages in that extent belong to that object.So, any time SQL needs to allocate a uniform extent to an object SQL will go to the GAM page and check the availability. The GAM is a bitmap, so if the bit is 1 then that extent is available to be allocated, and if it is 0 then it is not available to be allocated. Once SQL Server has allocated the extent, it just flips the bit for that GAM page from 1 to 0 to show that it is no longer available.The larger the file, the more GAM Pages you will have, for the GAM you will get another GAM page after 63,904 extents.Page 3 is for the shared global allocation map (SGAM) and this page is used if SQL needs to allocate space on a mixed extent. This SGAM page tracks mixed extent usage for when an extent is being used by more than one object. So, if I have an object that is less than eight pages and I don’t want to allocate a full extent, we will use a mixed extent. By default, when a brand-new object is created the first eight pages will be allocated on a mixed extent.The SGAM is a bitmap, so if the bit is 1 then it’s being used as a mixed extent and has space available to be allocated, then we would look for the corresponding PFS page to find the empty pages within that extent, and then we would allocate that page. The important point here is the SGAM is used in conjunction with the PFS page in order to allocate space on a mixed extent and again after about 64,000 extents you get another SGAM on the same file.When you have multiple files in tempdb, you get another immediate header, PFS, GAM, and SGAM because all files will have the same structure and with multiple files we try and share the workload over these files.SQL Server spreads out object allocations across files in the same filegroup based on the proportional fill algorithm. We try to keep the same percentage of free space in each file within the file group so if all the files in the file group start at the same size and they stay the Axit. Thông thường thì dung dịch đặc tạo NO2, loãng tạo NO, kim loại có tính khử càng mạnh thì N bị khử xuống mức càng sâu.Phương pháp giải: nNO3 - tạo muối = ne cho mmuối = mkim loại + mNO3 = mkim loại + 62. ne cho- Bảo toàn nguyên tố H: nH+ = 2nH2 hay nH+ = 4nNH4+ +2nH2O- Bảo toàn nguyên tố N: nHNO3 = nNO3 − trong muối + nN trong sản phẩm khửnHNO3 phản ứng = 2nNO2 + 4nNO + 10nN2O + 12nN2 + 10nNH4NO3- Nếu có hỗn hợp kim loại chứa Fe phản ứng với axit, sau phản ứng còn dư kim loại thì muối sắt thu được là muối Fe(II)- Dung dịch chứa đồng thời ion H+ và NO3- có tính oxi hóa tương tự dung dịch axit HNO3b. Kim loại tác dụng với dung dịch H2SO4 Sản phẩm khử : + SO2: khí mùi sốc (mùi hắc) + S: kết tủa vàng + H2S: khí mùi trứng thốiPhương pháp giải: sử dụng các định luật bảo toànCác công thức cần nhớ2nSO42- = ne chommuối = mkim loại + mSO4 = mkim loại + 96nSO2- Bảo toàn nguyên tố S: nH2SO4 = nSO42- trong muối + nS trong sản phẩm khửII. Ví dụ minh họaVí dụ 1: Đun nóng m gam hỗn hợp Cu và Fe có tỉ lệ khối lượng tương ứng 7:3 với một lượng dung dịch HNO3. Khi các phản ứng kết thúc, thu được 0,75m gam chất rắn, dung dịch X và 5,6 lít hỗn hợp khí (đktc) gồm NO và NO2 (không có sản phẩm khử khác của N+5). Biết lượng HNO3 đã phản ứng là 44,1 gam. Giá trị của m là: A. 448 B. 40,5 C. 33,6 D. 50,4Lời giải:Chọn đáp án: DGiải thích: Khối lượng Fe = 0,3m gam và khối lượng Cu = 0,7m gamSau phản ứng còn 0,75m gam → Fe chỉ phản ứng 0,25m gam; Fe dư vậy sau phản ứng chỉ thu được muối Fe2+.Ta có: nHNO3 = 0,7; nNO + nNO2 = 0,25 mol; số mol của Fe(NO3)2 = 0,25m/56Sơ đồ phản ứng: Fe + HNO3 → Fe(NO3)2 + NO + NO2 0,25m/56 0,7 0,25m/56 0,25Áp dụng ĐLBT nguyên tố N ta có: 0,7 = 2. 0,25m/56 + 0,25 → m =50,4 (g)Ví dụ 2: Hòa tan 14,8 gam hỗn hợp gồm Fe và Cu vào lượng dư dung dịch hỗn hợp HNO3 và H2SO4 đặc nóng. Sau phản ứng thu được 10,08 lít NO2 (đktc) và 2,24 lít SO2 (đktc). Khối lượng Fe trong hỗn hợp ban đầu là: A. 5,6 B. 8,4 C. 18 D. 18,2Lời giải:Chọn đáp án: BGiải thích: Gọi a, b lần lượt làDownloads Installs GAM7 GAM-team/GAM Wiki - GitHub
(ColumnStore indexes, temporal tables, In Memory OLTP, etc.) all these new features require new metadata to be tracked, therefore the number of system tables we need to delete from is increasing, which makes the process more impactful.Temp table cache contention can be more prominent on larger SQL Server environments, larger core counts and as the size of the cache and the number of concurrent threads accessing the cache grows, this can introduce slower cache access as well as contention for the memory object associated with the cache.This condition can manifest in two different ways: CMEMTHREAD waits and SOS_CACHESTORE spinlock waits. To address temp table cache contention, it is recommended to track these wait conditions for evidence and ensure you have installed the latest cumulative updates (CUs) for SQL Server.Check out our Tech Community blog for more information on temp table caching in SQL Server.SQL Server 2022 tempdb improvementsIn SQL Server 2022 we have addressed the final common areas of contention by introducing concurrent GAM and SGAM updates similar to the Concurrent PFS updates.We use the Global Allocation Map (GAM) pages when we are looking for uniform extents and the Shared Global Allocation Map (SGAM) pages when we are looking for mixed extents in tempdb.In previous releases, under higher concurrent workloads we may have GAM contention where many different threads attempt to allocate extents on the same GAM page and each thread must first wait for another thread to release their UPDATE latch before they can obtain their own latch to allow them to make changes—so, we are just waiting in line.As can be seen in the workload example below, on SQL Server 2019 there is a wall of GAM contention driving over 123,000 counts of contention with the longest wait taking 949 milliseconds.The reason for this is that with the update latch, only one thread can modify the GAM page at a time, leading to contention. This is the primary reason we still need multiple data files and because of this contention, SQL Server throughput is decreased and workloads that require many updates to the GAM page will take longer to complete while the machine’s CPU will be underutilized. This contention is due to the workload volume and especially the use of repetitive create-and-drop operations.Starting with SQL Server 2016, we changed the default behavior to always allocate uniform extents when creating new objects in tempdb. This helped avoid most of the SGAM contention, but we still use mixed extents for Index Allocation Map (IAM) page allocations. IAM pages are used to track all the pages that belong to an object, so every object that gets created has at least one IAM page. For most workloads, these IAM page allocations don’tl Android Installation GAM-team/GAM Wiki - GitHub
Seon-gam Island, South Korea – Two men stand at the entrance to a forest surrounded by tall pine trees on an island south of the capital Seoul.In the middle of the forest there is a large clearing and an excavation site.The words written on a safety notice reveal what this forest hides: “Seon-gam Academy Graveyard Recovery Operation”.Chun Jong-soo and Pak Sung-ki were just boys when they were among thousands cleared off the streets by South Korean authorities for alleged vagrancy, and held for years as inmates at institutions like Seon-gam Academy.Seon-gam island was only accessible by boat when Chun and Pak were first detained in 1965 and 1980, respectively.Fighting to control his trembling voice, Chun says he remembers the burial site now being excavated here. He was among the young detainees forced to bury the bodies of his fellow inmates who died trying to escape. Chun told Al Jazeera how they would recover bodies that washed up on the island’s shores and bury them at this forest cemetery.“It was meant to show us the consequences of trying to escape,” Chun said.“Memories of seeing those bodies still haunt me in my sleep.”A photo of an image showing young inmates arriving by boat on Seon-gam Island [David D. Lee/Al Jazeera]Hundreds and possibly thousands died amid the forced labour, violence and sexual abuse that prevailed in the group homes and detention centres – like the Seon-gam Academy – that were established across South Korea during the country’s decades of heavy-handed rule from the 1960s through to the 1980s.Among the most notorious was “Brothers Home”, a so-called welfare centre that was once located in the southern port city of Busan, where thousands were enslaved and abused in a state-sponsored programme to punish vagrants and clear the homeless from South Korea’s streets.While police did most of the seizures, Brothers Home employees were also allowed to patrol the city in trucks to do the kidnapping themselves. Children, people with disabilities, and the homeless were rounded up, detained and forced to work at the home where survivors recounted witnessing people beaten to death by staff or left to die from injuries.‘Real hell’ v TV dramaThe existence of these brutal institutions in South Korea has come to wider attention as Netflix’s Squid Game gains global attention.Season two of the South Korean drama kicked off late last year by racking up the largest audience ever for the debut of. Getting Started with GAM: Installation and Configuration. To harness the power of GAM, the first step is to install it on your local machine. GAM is available for Windows, LinuxDownloads Installs GAM7 GAM-team/GAM Wiki GitHub
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Why can't I install El Chavo Kart: Kart racing gam?The installation of El Chavo Kart: Kart racing gam may fail because of the lack of device storage, poor network connection, or the compatibility of your Android device. Therefore, please check the minimum requirements first to make sure El Chavo Kart: Kart racing gam is compatible with your phone.How to download El Chavo Kart: Kart racing gam old versions?APKPure provides the latest version and all the older versions of El Chavo Kart: Kart racing gam. You can download any version you want from here: All Versions of El Chavo Kart: Kart racing gamWhat's the file size of El Chavo Kart: Kart racing gam?El Chavo Kart: Kart racing gam takes up around 418.9 MB of storage. It's recommended to download APKPure App to install El Chavo Kart: Kart racing gam successfully on your mobile device with faster speed.What language does El Chavo Kart: Kart racing gam support?El Chavo Kart: Kart racing gam supports isiZulu,中文,Việt Nam, and more languages. Go to More Info to know all the languages El Chavo Kart: Kart racing gam supports.
2025-04-10IntroductionRequirementsInstallation - First time GAM7 installationInstallation - Upgrading from Legacy GAMIntroductionGAM7 is a free, open source command line tool for Google Workspace Administrators to manage domain and user settings quickly and easily.This page provides simple instructions for downloading, installing and starting to use GAM7.GAM7 requires paid, or Education/Non-profit, editions of Google Workspace. G Suite Legacy Free Edition has limited API support and not all GAM commands work.GAM7 is a rewrite/extension of Jay Lee's Legacy GAM, without his efforts, this version wouldn't exist.GAM7 is backwards compatible with Legacy GAM, meaning that if your command works with Legacy GAM, it will also work with GAM7. There may be differences in output, but the syntax is compatible.DocumentationDocumentation for GAM7 is hosted in the GitHub Wiki and in Gam*.txt files.Mailing List / Discussion groupThe GAM mailing list / discussion group is hosted on Google Groups. You can join the list and interact via email, or just post from the web itself.Chat RoomThere is a public chat room hosted in Google Chat. Instructions to join.Source RepositoryThe official GAM7 source repository is on GitHub in the master branch.AuthorGAM is maintained by Jay (James) Lee and Ross Scroggs. Please direct "how do I?" questions to Google Groups.RequirementsTo run all commands properly, GAM7 requires three things:An API project which identifies your install of GAM7 to Google and keeps track of API quotas.Authorization to act as your Google Workspace Administrator in order to perform management functions like add users, modify group settings and membership and pull domain reports.A special service account that is authorized to act on behalf of your users in order to modify user-specific settings and data such as Drive files, Calendars and Gmail messages and settings like signatures.Installation - First time GAM7 installationUse these steps if you have never used any version of GAM in your domain. They will create a GAM projectand all necessary authentications.Download: Downloads-InstallsConfiguration: GAM7 ConfigurationInstall: How to Install Advanced GAMInstallation - Upgrading from Legacy GAMUse these steps if you have used any version of Legacy GAM in your domain. They will update your GAM projectand all necessary authentications.Download: Downloads-InstallsConfiguration: GAM7 ConfigurationUpgrade: How to Upgrade from Legacy GAMYou can install multiple versions of GAM and GAM7 in different parallel directories.
2025-04-10G/ml). Vậy thể tích H2SO4 cần dùng tối thiểu là: A. 21,1 ml B. 21,5 ml C. 23,4 ml D. 19,6 mlLời giải:Chọn đáp án: BGiải thích: mO = moxit - mkim loại = 4,66 - 3,86 = 0,8g nO = 0,8/16 = 0,05 mol nO = 2nH+ = nH2SO4 = 0,05 mol=> V = (0,05. 98. 100)/(20. 1,14) = 21,5 mlCâu 5: Cho tan hoàn toàn 58 gam hỗn hợp gồm Fe, Cu, Ag trong dung dịch HNO3 2M thu được 0,15 mol NO; 0,05 mol N2O và dung dịch D. Cô cạn dung dịch D, khối lượng muối khan thu được là: A. 120,4 gam B. 89,8 gam C. 116,9 gam D. 110,7 gamLời giải:Chọn đáp án: DGiải thích: mmuối khan = mFe, Cu, Ag + mNO3-Có: nNO3- = 3.nNO + 8.nN2O = 3. 0,15 + 8. 0,05 = 0,85 molmmuối khan = 58 + 0,95. 62 = 110,7 (g)Câu 6: Khi cho 100 g hợp kim gồm có Fe, Cr và Al tác dụng với lượng dư dung dịch NaOH thu được 6,72 lít khí. Lấy bã rắn không tan cho tác dụng với một lượng dư dung dịch HCl (khi không có không khí) thu được 38,08 lít khí. Các thể tích đo ở đktc. Xác định thành phần % của hợp kim.Lời giải:Giải thích: Các phương trình hóa học: 2Al + 2NaOH → 2NaAlO2 + 3H2 (1) z 3z/2Phần không tan là Fe và Cr Fe + 2HCl → FeCl2 + H2 (2) x x Cr + 2HCl → CrCl2 + H2 (3) y ynH2 (1) = 6,72/22,4 = 0,3 molSố mol H2 (2), (3): nH2 (2), (3) = 38,08/22,4 = 1,7 molGọi x, y, z lần lượt là số mol của Fe, Cr, AlTheo bài ra ta có hệ phương trình.Thành phần % theo khối lượng của hỗn hợp là: %mFe = (1,55.56)/100. 100% = 86,8% %mCr = (0,15.52)/100. 100% = 7,8% %mAl = 100% - (86,8% + 7,8%) = 5,4%Câu 7: Cho 13,33 gam hỗn hợp Al, Cu, Mg tác dụng với dung dịch H2SO4 loãng dư thu được dung dịch A, 7,728 lít khí (đktc) và 6,4 gam chất rắn không tan. Cô cạn dung dịch A thu được bao nhiêu gam muối khan? A. 40,05 gam B. 42,25 gam C. 25,35 gam D. 46,65 gamLời giải:Chọn đáp án: AGiải thích: nH2SO4 = nH2 = 0,345 molmAl + mMg = 13,33 – 6,4 = 6,93g=> mmuối = mAl + mMg + mSO42- = 40,05 gamCâu 8: Cho 29 gam hỗn hợp Mg, Zn, Fe tác dụng hết với dung dịch H2SO4 loãng thấy thoát ra V lít khí (đktc). Cô cạn dung dịch sau phản ứng thu được 86,6 gam muối khan.
2025-04-10The extent allocation comes in as the GAM tracks when SQL Server needs to allocate a uniform extent.An extent in SQL Server is comprised of 8 x 8KB pages, 64KB, and this is usually the unit of data allocation so if you have a table that’s larger than eight pages, any time we allocate space to that table we will create a full extent, and this is a uniform extent because all eight pages in that extent belong to that object.So, any time SQL needs to allocate a uniform extent to an object SQL will go to the GAM page and check the availability. The GAM is a bitmap, so if the bit is 1 then that extent is available to be allocated, and if it is 0 then it is not available to be allocated. Once SQL Server has allocated the extent, it just flips the bit for that GAM page from 1 to 0 to show that it is no longer available.The larger the file, the more GAM Pages you will have, for the GAM you will get another GAM page after 63,904 extents.Page 3 is for the shared global allocation map (SGAM) and this page is used if SQL needs to allocate space on a mixed extent. This SGAM page tracks mixed extent usage for when an extent is being used by more than one object. So, if I have an object that is less than eight pages and I don’t want to allocate a full extent, we will use a mixed extent. By default, when a brand-new object is created the first eight pages will be allocated on a mixed extent.The SGAM is a bitmap, so if the bit is 1 then it’s being used as a mixed extent and has space available to be allocated, then we would look for the corresponding PFS page to find the empty pages within that extent, and then we would allocate that page. The important point here is the SGAM is used in conjunction with the PFS page in order to allocate space on a mixed extent and again after about 64,000 extents you get another SGAM on the same file.When you have multiple files in tempdb, you get another immediate header, PFS, GAM, and SGAM because all files will have the same structure and with multiple files we try and share the workload over these files.SQL Server spreads out object allocations across files in the same filegroup based on the proportional fill algorithm. We try to keep the same percentage of free space in each file within the file group so if all the files in the file group start at the same size and they stay the
2025-03-29Axit. Thông thường thì dung dịch đặc tạo NO2, loãng tạo NO, kim loại có tính khử càng mạnh thì N bị khử xuống mức càng sâu.Phương pháp giải: nNO3 - tạo muối = ne cho mmuối = mkim loại + mNO3 = mkim loại + 62. ne cho- Bảo toàn nguyên tố H: nH+ = 2nH2 hay nH+ = 4nNH4+ +2nH2O- Bảo toàn nguyên tố N: nHNO3 = nNO3 − trong muối + nN trong sản phẩm khửnHNO3 phản ứng = 2nNO2 + 4nNO + 10nN2O + 12nN2 + 10nNH4NO3- Nếu có hỗn hợp kim loại chứa Fe phản ứng với axit, sau phản ứng còn dư kim loại thì muối sắt thu được là muối Fe(II)- Dung dịch chứa đồng thời ion H+ và NO3- có tính oxi hóa tương tự dung dịch axit HNO3b. Kim loại tác dụng với dung dịch H2SO4 Sản phẩm khử : + SO2: khí mùi sốc (mùi hắc) + S: kết tủa vàng + H2S: khí mùi trứng thốiPhương pháp giải: sử dụng các định luật bảo toànCác công thức cần nhớ2nSO42- = ne chommuối = mkim loại + mSO4 = mkim loại + 96nSO2- Bảo toàn nguyên tố S: nH2SO4 = nSO42- trong muối + nS trong sản phẩm khửII. Ví dụ minh họaVí dụ 1: Đun nóng m gam hỗn hợp Cu và Fe có tỉ lệ khối lượng tương ứng 7:3 với một lượng dung dịch HNO3. Khi các phản ứng kết thúc, thu được 0,75m gam chất rắn, dung dịch X và 5,6 lít hỗn hợp khí (đktc) gồm NO và NO2 (không có sản phẩm khử khác của N+5). Biết lượng HNO3 đã phản ứng là 44,1 gam. Giá trị của m là: A. 448 B. 40,5 C. 33,6 D. 50,4Lời giải:Chọn đáp án: DGiải thích: Khối lượng Fe = 0,3m gam và khối lượng Cu = 0,7m gamSau phản ứng còn 0,75m gam → Fe chỉ phản ứng 0,25m gam; Fe dư vậy sau phản ứng chỉ thu được muối Fe2+.Ta có: nHNO3 = 0,7; nNO + nNO2 = 0,25 mol; số mol của Fe(NO3)2 = 0,25m/56Sơ đồ phản ứng: Fe + HNO3 → Fe(NO3)2 + NO + NO2 0,25m/56 0,7 0,25m/56 0,25Áp dụng ĐLBT nguyên tố N ta có: 0,7 = 2. 0,25m/56 + 0,25 → m =50,4 (g)Ví dụ 2: Hòa tan 14,8 gam hỗn hợp gồm Fe và Cu vào lượng dư dung dịch hỗn hợp HNO3 và H2SO4 đặc nóng. Sau phản ứng thu được 10,08 lít NO2 (đktc) và 2,24 lít SO2 (đktc). Khối lượng Fe trong hỗn hợp ban đầu là: A. 5,6 B. 8,4 C. 18 D. 18,2Lời giải:Chọn đáp án: BGiải thích: Gọi a, b lần lượt là
2025-04-08