LabQuest Viewer vs Stoichiometric equations

LabQuest Viewer allows you to use your classroom iPad to wirelessly view and control a Vernier LabQuest® data collection interface. This allows you to remotely monitor and interact with any LabQuest on your network. If your classroom iPad is equipped to display with a projector, LabQuest Viewer allows you to present any LabQuest screen for the entire class, enabling teacher-led demonstrations and student-led presentations. While viewing a LabQuest, use the share feature to capture a screenshot of the LabQuest display for use in lab instructions or other documents. Vernier LabQuest Required Network access to at least one LabQuest is required to use this application. • Works with any LabQuest 2 (www.vernier.com/labq2) • Can also be used with a Wi-Fi-enabled original LabQuest (www.vernier.com/wifi-usb) Key features • View and control a LabQuest from an iPad • Monitor student progress on any LabQuest connected to your network • Project the iPad running LabQuest Viewer for class demos and presentations • Share screenshots of the LabQuest display for use in lab instructions Additional customizable permissions (enabled through settings on a LabQuest) • Permit viewing without control • Password-protect a connection Vernier Software & Technology has over 30 years of experience in providing effective learning resources for understanding experimental data in science and math classrooms. LabQuest Viewer is a part of Vernier’s extensive system of sensors, interfaces, and data-collection software for science education.

Stoichiometric Equation balances chemical reaction equations for you — no trial and error, no guessing. Enter the reactants and the products, tap Balance equation, and the app returns the stoichiometric coefficients as the smallest set of whole numbers. Balancing an equation means making sure that the same number of atoms of every element appears on both sides. For a reaction such as 2Na + Cl₂ = 2NaCl you can still do that in your head. For e.g 3As₂S₃ + 28HNO₃ + 4H₂O = 6H₃AsO₄ + 9H₂SO₄ + 28NO, trial and error quickly stops being practical. That is exactly where this app takes over. HOW IT WORKS Instead of guessing, the app treats the equation the way a mathematician would: every unknown coefficient becomes a variable, the atom counts for each element become one linear equation, and the resulting system is solved with Gaussian elimination. The coefficient matrix is transformed into reduced row echelon form and the solution is scaled to the smallest whole-number coefficients. The complete derivation is included in the app, step by step, with a fully worked example — so you can not only get the answer, but also understand how it is found. FEATURES • Balances simple reactions and long, complex equations alike • Nested grouping with parentheses ( ), square brackets [ ] and braces { } • More than 90 chemical elements, written with the international IUPAC symbols • Results in the smallest whole-number coefficients • Clear, formatted output: proper subscripts, highlighted coefficients, monospaced layout • Long results are wrapped automatically to fit your screen • Precise error messages — unbalanced brackets, unknown element symbol, non-balanceable equation and more, each named instead of a vague "invalid input" • A collection of ready-made example equations: tap one and it is solved instantly • Built-in theory section explaining the mathematics behind the solver • German and English interface, chosen automatically from your device language • Optimised for iPhone and iPad, in portrait and landscape BUILT-IN EXAMPLES The app ships with examples ranging from textbook reactions to equations that would take a very long time by hand,