Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.
Baza zadań
Wybierz umiejętność, rok lub poziom trudności. Każde zadanie ma klucz i schemat punktowania.
Pokazujemy tylko poziomy, dla których mamy zadania.
Znaleziono 1061 zadań
8.00 mol of ammonia are mixed with 8.00 mol of oxygen. The equation for the reaction that occurs is shown below. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) What is the amount, in mol, of nitrogen(II) oxide, NO, produced, assuming that the reaction goes to…
Give the full electron configuration of a nitrogen atom in its ground state and state how many of its electrons are unpaired.
(i) Draw a Lewis (electron dot) structure of the nitrite ion. (ii) Predict the shape of the ion and the size of the O-N-O bond angle.
Atmospheric carbon dioxide and the pH of surface seawater were measured at a monitoring station over nineteen years. The graph shows the annual mean values. (i) Outline the relationship between the carbon dioxide mixing ratio and the pH of the seawater. (ii)…
(i) The ideal PMI, which corresponds to the greenest possible process, is 1. Estimate the ideal value of each of the other three metrics. (ii) Identify the metric in the table that cannot be affected by the choice of solvent. (iii) Suggest one reason why the…
Two methods of making ethyl ethanoate are compared using the Eco-Scale. The penalty points are given in the table. Method 1: ethanoic acid reacts with ethanol, with concentrated sulfuric acid as the catalyst. The mixture is heated in a microwave reactor for 40…
What is the sum of the coefficients when this equation is balanced with the smallest whole numbers? A. 8 B. 9 C. 10 D. 12
Deduce the expression for Kc of this reaction.
Predict, with a reason, the effect of increasing the total pressure, at constant temperature, on the position of equilibrium.
Explain why a higher temperature speeds up this reaction, with the help of annotations that you add to the Maxwell-Boltzmann distribution below, which is drawn for a temperature T1.