Chemistry Homework Assistance
QuestionAI's chemistry problem solver is a middle school chemistry tutoring tool that summarises key chemical reactions and equations in real-time, featuring a robust learning system to empower even those with a weak foundation in chemistry.
You needn't fret over the elemental properties of the periodic table anymore. Here, you can effortlessly access chemical reactions and reaction principles corresponding to each element. Deductive reasoning from microscopic phenomena to discern the original structure of molecules and atoms is a research technique we staunchly champion.
- Name the particle that an atom can lose or gain in order to form a charged ion.
- 21. According to the passage, which of the following best describes an unoxygenated sulfuret? A. the combination of sulfur and B. the combination of sulfur with ammoniac C. the combination of sulfur and metal D. the combination of sulfur with another substance 22.Why does the author mention sulfur, phosphorus, and charcoal in paragraph 1? A. to explain the meaning of sulfurets, phosphurets, and carburets C. to explain hote that they have certain chemical properties similar to hydrogen C. to explain how the D. to highlight the importance of compasses are formed tances with metals 23. What is the difference between fixed oils and volatile oils? A. Fat oils must be heated above the degree of boiling water. B. Volatile oils contain charcoal, but fixed oils do not. C. Unlike fixed oils volatile oils do not change in their chemical composition if distilled. D. In contrast to fixed oils, volatile oils decompose when heated. 24.According to the passage which of the following outcomes would occur if hydrogen was mixed with charcoal? A. A gas is formed. B. Either a fixed or volatile oil is formed. C. The combination results in an unchanged distillation. D. This depends upon whether hydrogen is added to charcoal or charcoal is added to hydrogen. 25. Which phrase or sentence from the passage best supports the answer to question 24? A. according to the proportions of hydrogen and charcoal in its composition B. the former contains an excess of charcoal C. they form oil , which is either fixed or volatile D. containing a just proportion of these two constituent ingredients
- 1. Use the data in the table to calculate the enthalpy change of formation of ethanol Substance & Delta_(mathrm(C)) H^circ / mathrm(kJ) mathrm(mol)^-1 mathrm(C)(mathrm(s)) & -394 mathrm(H)_(2)(mathrm(~g)) & -286 mathrm(C)_(4) mathrm(H)_(10)(mathrm(~g)) & -2877 mathrm(C)_(2) mathrm(H)_(5) mathrm(OH)(mathrm(l)) & -1367
- For a chlorine atom (CI) How many electrons are in the 1st orbital? square How many electrons are in the 2nd orbital? square How many electrons are in the 3rd orbital? square
- A (b) Give one reason why using a catalyst reduces costs. Do not answer in terms of activation energy. square D