When iron rusts, it is a chemical change. What happens during this process? A. The color remains the same. B. No chemical reaction occurs. C. A new substance is formed. D. The mass of iron decreases. 相关知识点: 试题来源: 解析 C。铁生锈是化学变化,在这个过程中会形成新物质。A ...
What happens when you squeeze a bottle with half water, half air? In the reaction H2CO3 \rightarrow HCO-3+H1, the "H2CO3" acts as a? Write the balanced chemical for the double replacement reaction which occurs upon the mixing of solutions of sodium carbonate and calcium chlorid...
What happens when dihydrogen is passed over heated CuO? Video SolutionStruggling With Hydrogen? Study With Allen’s Free Live Crash Course Free ALLEN Course Text SolutionGenerated By DoubtnutGPT When dihydrogen (H₂) is passed over heated copper oxide (CuO), a chemical reaction occurs that res...
What occurs when an excited electron returns to its ground state? a. the nucleus decomposes and emits nuclear energy b. energy is emitted as photons of light c. the electron combines with a proton in a chemical reaction d...
B1 (a) When a piece of magnesium ribbon burns in the air, a dazzling flame can be seen and a white powder is formed.(i) Name the process described above.[1(ii) Write a word equation to describe what happens when[1magnesium ribbon burns in air.(iii) Is the product formed an ...
How do you know when a chemical reaction is complete? Chemical Analysis: There are many instruments (e.g. gas chromatography, infrared spectroscopy, etc) that can aide in the identification of chemical compounds. Additionally, there are many qualitative and quantitative laboratory methods for determin...
What does hydrogen peroxide do to liver? Liver contains a specific enzyme called catalase. When hydrogen peroxide (H2O2) is added to liver,a chemical reaction occurs which results in the products of oxygen gas (O2) and liquid water (H2O). ...
What happens when potassium metal reacts with water? Potassium metal reacts with water to givepotassium hydroxide and hydrogen gas. When potassium metal is placed in water will a reaction occur if so what is the balanced equation for the reaction?
who can tolerate it and those who can't. For those who are lactose intolerant, even a small amount of lactose can lead to uncomfortable gastrointestinal symptoms. While there are lactose-free and lactose-reduced products available, they are not always easy to find or affordable. So, what ...
What is the chemical formula for calcium bicarbonate? Is calcium carbonate a base? How do metals and nonmetals react with water? What reacts with iron to form rust? What happens when bromine reacts with aluminum iodide? What occurs when an atom loses an electron? What is the electron confi...