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Chemical
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∙ 9y ago
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Is mixing hydrogen and oxygen together a chemical change or a physical change?
Just the mixing of hydrogen and oxygen isn't a change at all. But if they react under specific conditions, you have a chemical change. The reaction might look like this ... 2H2(g) + O2(g) --> 2H2O
Is fertilizing a lawn a chemical or physical change?
chemical change
Is calcium in water a physical or chemical change?
Adding calcium to water results in a chemical change because the calcium and the water that react are combined to form a distinct new substance, calcium hydroxide, that did not exist in either the calcium or the water before their reaction.
When two clear liquids are mixed and a yellow color forms is it a chemical change?
Yes, a colour change indicates a chemical change.
What distinguishes a chemical reaction from a physical change?
Matter that undergoes a physical change has the same chemical make up as the product. For example, when ice melts, the liquid water and ice are still water with the formula H2O. In a chemical change, matter does undergo a change, so that it is no longer the same substance that you started with. For example, magnesium plus hydrochloric acid react to produce the products magnesium chloride and hydrogen gas. So the products are completely different from the reactants.
When an object does not react with hydrogen is that a chemical change or physical change?
Easy, chemical change.
Is failure to react a physical or chemical?
no failure to react is a chemical property
Is mixing hydrogen and oxygen together a chemical change or a physical change?
Just the mixing of hydrogen and oxygen isn't a change at all. But if they react under specific conditions, you have a chemical change. The reaction might look like this ... 2H2(g) + O2(g) --> 2H2O
Is spilling of acid on a cloth a physical or chemical change?
It is a chemical change only if this acid react with the cloth.
Distinguish between physical and chemical change?
A chemical change is a change involving making and breaking chemical bonds to form new chemicals. For example when wood burns the carbon and hydrogen in the cellulose react with the oxygen in the air, forming carbon dioxide and water. A physical change is one that the chemical changes states and no new chemicals are formed, like melting ice or dissolving salt in water.
Is silver tarnishing a physical change?
No, it is a chemical change. The tarnish seen on silver is silver sulfide which formed by the silver reacting from small amounts of hydrogen sulfide in the air. So silver sulfide has been created by a chemical reaction.
Is ability to react with other substances chemical or physical?
This is a chemical reaction. When substances change you can call it chemical.
Is metal roasting a chemical or physical change?
The rusting of metal is a chemical change and not a physical change. This is because iron and water react to form a compound called iron oxide.
Is ability to react with other substance a physical or chemical?
Chemical. If vinegar reacts with baking soda, a new substance is produced. If something new is produced, it is chemical. In chemical reactions, things change what they are. Water splitting into hydrogen gas and oxygen is chemical, because hydrogen gas and oxygen gas is different from water.
Is dicing potatoes a chemical change?
Slicing is pure mechanical, so physical but it is not a CHANGE but an ACTION or EVENT
When sodium is put into waterit react forming sodium hydroxide and hydrogen is this physical change or chemical change?
That's most definitely a chemical change, because new forms of matter are produced. Before the reaction, you had pure sodium and water. After the reaction (which is very explosive by the way), you have sodium hydroxide and hydrogen gas.
Is fertilizing a lawn a chemical or physical change?
chemical change
