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Hard substances are those which are difficult to scratch. For instance candle wax is not hard, you can scratch it with your finger nail. This means your nail is harder than wax. However, an iron nail could scratch your finger nail, but not the other way round, so an iron nail is quite hard. Diamond is the hardest natural substance.
What else can I help you with?
Because change the identity of the substances involved they are hard to reverse?
Chemical changes are hard to reverse because they involve the formation of new substances with different chemical properties than the original substances. This typically requires energy input or a specific reaction pathway to revert back to the original substances, making the process difficult to reverse.
Is there a difference in how soft water and hard water dissolves substances?
yes
What are hard substances?
Well, sugar, spice, and everything nice might make for a cute rhyme, but hard substances are more like diamonds, steel, and rock. Basically, if you can't squish it between your fingers like Play-Doh, it's probably a hard substance. So, put away the marshmallows and get ready to hit some hard truths about materials that don't mess around.
Any impenetrably or unyielding hard substance?
Diamond is one of the hardest substances known, with a rating of 10 on the Mohs scale of mineral hardness. Other examples of hard substances include tungsten carbide and silicon carbide.
Will one Vicodin show up on a drug test?
Not atall, only hard substances
What does a high boiling temperature indicate about a substances?
intermolecular forces are hard to overcome...apex
Are pure bread puppies hard to keep?
Not to sure what you mean by "hard to keep" By the way its "Purebred". By hard to keep do you mean, are the mean, will they run away?
What does hard to bear mean?
hard to take in
Substances that cannot be broken down by chemical mean?
Substances that cannot be chemically broken down into simpler substances are called elements.
What is BP referring to chemical substances?
With reference to chemical substances, the acronym BP would mean boiling point.
What is a harmful reaction to substances called?
Did you mean: "What is a reaction to harmful substances called?" ? Allergy, infection, poisoning or death.
What is the substances in a styling gel that makes your hair hard?
It varies but is usually a modified cellulose polymer.
