Answer:
Chemical Substances
It cannot be separated into components without breaking chemical bonds. Chemical substances can be solids, liquids, gases, or plasma. Changes in temperature or pressure can cause substances to shift between the different phases of matter.
Explanation:
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Brainliest plz? i need 5 more.
Answer:
Neutralization reaction is a reaction between an acid and a base. In general, when the reaction is performed in aqueous media, produce water and salt.
Explanation:
Arrhenius defined a base as a substance who forms OH- ions. Bronsted, define it as an proton acceptor.
On the other hand Arrhenius defined an acid as a substance who form H+ ions. Breonsted define it as proton donor.
Acid + base ----> salt + water
A salt is an ionic compund formed by a cation and anion. All salts are strong electrolytes. An example of a neutralization reaction is:
HCl (ac) + NaOH (ac) -------> NaCl (ac) + H2O(l)
Nevertheless, because the acid and the base are strong electrolytes, in water they are completely dissolved actually look like this:
H+ (ac) + Cl(ac) + Na+(ac) + OH-(ac) ------> Na+(ac) + Cl-(ac) + H2O(l)
Answer:
mass (m) of the snow that the backpacker collected= 0.855 kg
Explanation:
Given that:
Q = 643 kJ = 643000 J
ΔHfusion = 6.02 kJ/mol = 6020 J/mol
number of mole of water H2O = 
c = 4.18 J/g⋅K
ΔT = 100 K
Since there is a phase change from solid to liquid; then :
ΔH = 
However without the given mass; we substitute 
for the number of moles; so:
Q = 
m = 855 g
m = 0.855 kg
mass (m) of the snow that the backpacker collected= 0.855 kg
The properties of malleability and ductility can all be explained on the basis of metallic bonding.
<h3>What is malleability?</h3>
The term malleability refers to the ability of a metal to be hammered into sheets. It is a very important property of metals that helps in metal work. The images are not shown here hence the question is incomplete.
Ductility refers to the ability of metals to be drawn into sheets. This is the reason why metals can be used to make wires. All these properties are explained on the basis of metallic bonding.
Learn more about metallic bonding: brainly.com/question/10714037
Answer:
Explanation:
Since the crystal structure is FCC , every unit cell will have 4 atoms . If a be the edge length
average density = 4 x average atomic no / volume of unit cell x N
N is avogadro no or 6.02 x 10²³
average atomic no
= 100 / (87/107.9 +13/106.4) = 107.72
average density = 100 / (87/10.49 + 13/12.02)
= 10.667
10.667 = (4 x 107.72 )/ (a³x 6.02 x 10²³)
a³ = 4 x 107.72 / (10.667 x 6.02 x 10²³)
= 6.71 x 10⁻²³
a = 4.063 x 10⁻⁸ m
