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Stoichiometry Solver
Result: —
const givenMass = document.getElementById(“givenMass”);
const molarMass = document.getElementById(“molarMass”);
const coeffGiven = document.getElementById(“coeffGiven”);
const coeffTarget = document.getElementById(“coeffTarget”);
const molarMassTarget = document.getElementById(“molarMassTarget”);
const stoichResult = document.getElementById(“stoichResult”);
function calculateStoichiometry() {
const gMass = parseFloat(givenMass.value) || 0;
const gMolar = parseFloat(molarMass.value) || 0;
const cGiven = parseFloat(coeffGiven.value) || 0;
const cTarget = parseFloat(coeffTarget.value) || 0;
const tMolar = parseFloat(molarMassTarget.value) || 0;
if (gMass > 0 && gMolar > 0 && cGiven > 0 && cTarget > 0 && tMolar > 0) {
// Step 1: Moles of given substance
const molesGiven = gMass / gMolar;
// Step 2: Moles of target substance
const molesTarget = (molesGiven * cTarget) / cGiven;
// Step 3: Mass of target substance
const massTarget = molesTarget * tMolar;
stoichResult.textContent = `Result: ${massTarget.toFixed(2)} grams of target substance`;
} else {
stoichResult.textContent = “Result: —”;
}
}
// Auto-calculate on input
document.getElementById(“stoichForm”).addEventListener(“input”, calculateStoichiometry);
// Google Analytics event tracking on input focus
document.querySelectorAll(“#stoichForm input”).forEach(input => {
input.addEventListener(“focus”, function() {
if (typeof gtag === “function”) {
gtag(‘event’, ‘input_focus’, {
‘event_category’: ‘Stoichiometry Solver’,
‘event_label’: this.id
});
}
});
});
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