Answer:
1.19mole
Explanation:
Given parameters:
Mass of potassium hydroxide , KOH = 66.48g
Unknown:
Number of moles of KOH = ?
Solution:
To solve this problem, we need to use the expression below;
Number of moles =
Molar mass of KOH = 39 + 16 + 1 = 56g/mol
Number of moles = = 1.19mole
So 6.02*10^22 is avogadro constant, which is the amount of atoms in one mole. If you look Xenon up in the periodic table you will find it's mass given <span>131,293, which is grams per 1 mole.
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Answer:
Explanation:
Hello,
The question above requires us to classify certain properties which may either fall into physical or chemical properties of that matter.
Physical properties are properties which are of intrinsic value and has no influence on the chemical nature of the substance while chemical properties are those that influence the chemical nature of the substance.
Physical properties can be measured or calculated while chemical properties of a substance is very difficult to measure.
a). Silver has a shiny luster is an example of "physical property" because the shiny nature of silver has no chemical importance.
b). Silver metal has a density of 10.49 g/cm³ is also a "physical property" because density is a physical property of a material.
Density is ratio between mass and volume which are both physical properties since they can be measured.
c). Silver metal and Chlorine gas produce Silver chloride (AgCl) is a "chemical property" since it involves combining of two elements and they both lose their original chemical identity after the reaction.
d). Silver metal has a melting point of 1235°C is a "physical property"
e). Silver metal conducts electricity is a "chemical property" since conduction of electricity are done by the availability of mobile electrons in its electron cloud.
f) silver metal gives no reaction to acid is also an example of "chemical property"
thinner than the crust below the continents
Explanation:
The crust below the oceans is thinner than the crust below that continents.
This crust is called oceanic crust. It is predominantly made up of mafic magma which produces basalt and other mafic rocks when they cool and solidify.
- The oceanic crust is generally thinner than the continental crust below the continent.
- The oceanic crust is about 5-10km thick.
- Continental crust is about 30km thick.
- In terms of density, the oceanic crust is denser than the continental crust.
learn more:
Continental crust brainly.com/question/10537829
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