Why did the can collapse? The hot gas molecules are the same pressure as the air outside the can. When the can is placed in cold water upside down, the hot gas water molecules are cooled very rapidly. Since the air pressure outside the can is stronger than that inside the can, it causes the […]

What is the atomic number of an atom that has 8 protons 8 neutrons and 7 electrons? Answer 8: An oxygen atom usually has 8 protons, 8 neutrons, and 8 electrons. Looking at the periodic table, oxygen has atomic number 8 and atomic weight 15.999. The atomic number tells you how many protons are in […]

What happens when silver tarnishes a reaction? Silver tarnishes as silver metal reacts with hydrogen sulfide, H2S, in the air. In this reaction, dark silver sulfide, Au2S, covers the surface of silver. When silver is polished, this coating of silver sulfide can be removed from the surface. This makes the silver shiny again. What happens […]

Which type of convergent boundary is Carlos looking at? Answer Expert Verified The correct answer is letter b. an oceanic-arctic convergent boundary. Carlos is looking at a picture of a convergent boundary on which a volcanic arc and a trench are identified. Which is a type of tectonic plate boundary? Tectonic Plates and Plate Boundaries […]

When a crystal of potassium permanganate is placed at the bottom of water in a beaker the water in the whole beaker turns purple on its own even without stirring this is an example of? Answer : When a crystal of potassium permanganate is placed in a beaker of water, the water slowly turns blue […]

How do you figure out calories on a food label? Most pre-packed foods have a nutrition label on the back or side of the packaging. These labels include information on energy in kilojoules (kJ) and kilocalories (kcal), usually referred to as calories. They also include information on fat, saturates (saturated fat), carbohydrate, sugars, protein and […]

What is a diamond in chemistry? Definition: Diamond is a form of carbon. In diamond, each carbon atom is attached to 4 other carbon atoms. It is a very strong structure. Diamond is very strong and hard and is very useful for oil drilling. What is a lab grown diamond called? Synthetic diamond Is Diamond […]

Is methanol soluble in CCl4? Propanol and butanol have limited water solubility, as do the higher alcohols. A more interesting question is whether methanol or ethanol dissolves in carbon tetrachloride. It is a fact that ethanol dissolves in petroleum ether, whereas methanol does not, and for the reasons given above. Is CH3OH miscible? Methanol is […]

Which of the following is the most polluting energy source oil natural gas biomass coal? The coal is the most polluting as when we burn the coal it cause acid rain, smog and the air pollution which is toxic and also harmful for the environment. The coal plants typically produced 3.5 millions ton of the […]

Is mixing sugar and water a chemical reaction? Dissolving sugar in water is an example of a physical change. Here’s why: A chemical change produces new chemical products. If you evaporate the water from a sugar-water solution, you’re left with sugar. How would you show that dissolving sugar in water is a physical change? Dissolving […]