Q. Why is the mass of the wood before the fire not equal to the mass of the ashes after the reaction?
Why is the mass of the wood before the fire not equal to the mass of the ashes after the reaction? The mass of the wood and the oxygen that allowed it to burn will equal the mass of the ashes and the gas given off during the burning.
Q. When wood burns the ash weighs much less than the original wood did explain why the law of conservation of mass is not violated in this situation?
The total mass of matter after burning the wood would be the same as the total mass of matter before burning. In this way the law of conservation of mass is not violated.
Q. Why the ashes that form when a log burns have a lower mass than the log had before it started burning?
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.
Q. Does burning wood burn Mass?
When wood burns, it loses mass. This is how ashes are created. Wood contains carbon and hydrogen and when they combine with the oxygen at high temperatures they create carbon dioxide and water vapor. When this mixture leaves the wood as smoke, ashes are what we have left over.
Q. Why is wood lighter after being burned?
Wood is made of fiber (cellulose) and minerals (metals). When wood is burned, oxygen and other elements in the air (mainly carbon, hydrogen and oxygen) react to form carbon dioxide that is released into the atmosphere, while the minerals turn into ashes. Thus the carbon is left to turn into charcoal.
Q. What happens to matter when burned?
Burning is a chemical process by which two atoms or molecules will combine with each other. In burning, the two atoms or molecules will combine and release energy. When the molecules combine and release energy, it is released in the form of heat and often light.
Q. Can you explain why mass is conserved even when it looks like some mass was lost?
No new atoms are created during the reaction and no existing atoms disappear or are destroyed, so mass is conserved.
Q. Is burning a fast or slow reaction?
Chemical reactions that complete in a very short time, such as less than 10 -6 seconds, they are called fast reactions. Examples: Magnesium ribbon is burnt in the flame of Bunsen burner; it quickly gets combusted with a noticeable spark. Similarly, a neutralization reaction between acids and bases is a fast reaction.
Q. When a diamond is burned the mass that remains is zero?
When a diamond is burned the mass remains zero as diamond is formed by pure carbon atom and gives off carbon dioxide and water. Therefore, wood, as well as the diamond, disobey the law of conservation of mass.
Q. What evidence tells us that the sugar is still there even though we can’t see it?
The sugar water weights 175 grams which is the same as all the sugar (25g) plus all the water (150g). This is evidence that the sugar is still there even though we can’t see it.
Q. Can mass be destroyed?
The law implies that mass can neither be created nor destroyed, although it may be rearranged in space, or the entities associated with it may be changed in form. Mass is also not generally conserved in open systems.
Q. Which is the best example of law of conservation of mass?
12 g of carbon combines with 32 g of oxygen to form 44 g of CO2 is the best example of law of conservation of mass.
Q. Why is it hard to prove the law of conservation of mass?
It is difficult to prove the law of conservation of mass when a gas is produced because the gas molecules move quickly into the outside space and away…
Q. Who gave the law of conservation of mass?
Antoine Lavoisier’s
Q. How do you prove the law of conservation of mass?
After the reaction is complete and the materials separated, we find that we have formed 143.4 grams of silver chloride and 85.0 grams of sodium nitrate, giving us a total mass of 228.4 grams for the products. So, the total mass of reactants equals the total mass of products, a proof of the law of conservation of mass.
Q. What do you mean by law of constant proportion?
Definitions of law of constant proportion. (chemistry) law stating that every pure substance always contains the same elements combined in the same proportions by weight. synonyms: law of definite proportions. type of: law, law of nature.
Q. What do you understand by law of constant proportion?
The law of constant proportions states that chemical compounds are made up of elements that are present in a fixed ratio by mass. This implies that any pure sample of a compound, no matter the source, will always consist of the same elements that are present in the same ratio by mass.
Q. What is the law of definite proportions easy definition?
Law of definite proportions, statement that every chemical compound contains fixed and constant proportions (by mass) of its constituent elements.
Q. What is Dalton’s Law of definite proportions?
The law of definite proportions states that a chemical compound always contains exactly the same proportion of elements by mass. The atomic theory explains the law of definite proportions: Dalton proposed that the smallest particle of carbon monoxide was a molecule.
Q. What do you mean by law of proportion?
In chemistry, the law of definite proportion, sometimes called Proust’s law, or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.
Q. What is the law of constant proportion Class 9?
Law of constant proportion states that a chemical compound always contains exactly the same proportion of elements by mass. If we take some mass of water, 8/9 of its mass will be oxygen and 1/9 will be hydrogen.
Q. What is multiple proportions explain with an example?
Law of Multiple proportion states that when two elements combine to form more than one compound, the mass of one element, which combines with a fixed mass of the other element, will always be ratios of whole numbers. For example, let us assume 2 molecules CO (carbon monoxide) and CO2(carbon dioxide).
Q. What are the three stages of laws of production?
There is no difference between fixed and variable factors of production. There are 3 stages namely, increased returns, constant returns, and decreasing returns, and no stage is considered best for the long run.
Q. What are the two laws of production?
The laws of production describe the technically possible ways of increasing the level of production. The expansion of output with one factor (at least) constant is described by the law of (eventually) diminishing returns of the variable factor, which is often referred to as the law of variable proportions.
Q. What is a short run period?
“The short run is a period of time in which the quantity of at least one input is fixed and the quantities of the other inputs can be varied. The long run is a period of time in which the quantities of all inputs can be varied.
Q. How long is the long run in economics?
The long run is a period of time in which all factors of production and costs are variable. In the long run, firms are able to adjust all costs, whereas in the short run firms are only able to influence prices through adjustments made to production levels.
Q. Are there fixed costs in the long run?
No costs are fixed in the long run. A firm can build new factories and purchase new machinery, or it can close existing facilities. In planning for the long run, a firm can compare alternative production technologies or processes.
