0
What else can I help you with?
Is sugar being heated to produce steam and a black solid a chemical change?
Yes is it a chemical change as the process is irreversible. Also its properties are being changed and it looks different physically which always means a chemical change has occurred or will occur if certain substances are put together.
In a beaker sugar is dissolved in water and then the water is heated and evaporates The sugar is recovered and heat is again applied Vapor is released and the material in the beaker changes from?
In a beaker, sugar is dissolved in water, and then the water is heated and evaporates. The sugar is recovered, and heat is again applied. Vapor is released, and the material in the beaker changes from white to black. What must you know to determine if a chemical change occurred? CO2 (carbon dioxide) CuO (oxidized copper) H2O (distilled water) H2O2 (hydrogen peroxide) NaCl (sodium chloride)
Is black smoke from a candle a chemical change?
Yes, the black smoke from a candle is a result of a chemical change. It is the incomplete combustion of the wax in the candle, producing carbon particles that are visible as black smoke.
When silver coins are found in ancient shipwreck's they are coated with a black crust What question could you decide whether the silver underwent a chemical or physical change?
You would need to know if the silver underwent change that left the silver as it was originally, (in this case, having a black substance attach to it) or a change that made the silver into a new substance (like tarnishing). If the silver is still the same before and after the change, it was a physical change. If the substance is changed into a different substance after the change, it is a chemical change.
When table sugar is heated to its melting point it bubbles and turns black When it cools it remains a black solid Describe the change as chemical or physical?
The change is chemical because the sugar undergoes a chemical reaction called caramelization when heated, resulting in the formation of new compounds that give it a black color and distinct flavor. This is a permanent change that cannot be reversed by simply cooling the sugar back to its original state.
Is sugar being heated to produce steam and a black solid a chemical change?
Yes is it a chemical change as the process is irreversible. Also its properties are being changed and it looks different physically which always means a chemical change has occurred or will occur if certain substances are put together.
When a black soot formed as a candle burns is it a chemical change?
Yes. That is a chemical change.
Is black tea a physical change or chemical change?
physical change
When glass turns black from fire is it a physical or chemical change?
chemical
Is wood becoming charred and black from burning a chemical change?
yes charring of wood is chemical change
In a beaker sugar is dissolved in water and then the water is heated and evaporates The sugar is recovered and heat is again applied Vapor is released and the material in the beaker changes from?
In a beaker, sugar is dissolved in water, and then the water is heated and evaporates. The sugar is recovered, and heat is again applied. Vapor is released, and the material in the beaker changes from white to black. What must you know to determine if a chemical change occurred? CO2 (carbon dioxide) CuO (oxidized copper) H2O (distilled water) H2O2 (hydrogen peroxide) NaCl (sodium chloride)
Is black crust a physical or chemical change?
The formation of black crust on an object is a chemical change because it involves a chemical reaction between the surface of the object and the surrounding environment, resulting in the formation of a new substance with different properties.
Is black smoke from a candle a chemical change?
Yes, the black smoke from a candle is a result of a chemical change. It is the incomplete combustion of the wax in the candle, producing carbon particles that are visible as black smoke.
Black smoke from candle physical change or chemical change?
The black smoke produced from a burning candle is a physical change. This is because the change in appearance (from no smoke to black smoke) does not involve a change in the chemical composition of the candle wax or the oxygen in the air. The black smoke is primarily made up of tiny carbon particles that result from incomplete combustion of the candle wax.
By heating green copper carbonate so that it changes to black copper oxide will this be a chamical or physical change?
The change from green copper carbonate to black copper oxide is a chemical change because it involves a chemical reaction where the chemical composition of the substance is altered. The color change indicates a new substance has formed, making it a chemical change.
Is a silver teapot turning black a chemical or physical change?
It is a chemical change but it can be reversed since that cahnge is only on the surface. It is merely an oxidization that occurs when silver is exposed to oxygen and has no contact with oil (which blocks the pores of the metal from reacting with oxygen).
Is black crystals of iodine turning into purple vapour of iodine a physical change or a chemical change?
The transformation of black crystals of iodine into purple vapor of iodine is a physical change. This is because the change does not involve a change in the chemical composition of iodine; it only involves a change in the physical state from solid to gas.
