Explanation:
Three factors that affect the rate of a chemical reaction
are listed below:
1.presence/absence of catalyst
2.temperature
3.nature of reactants
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A- elements have only one type of atom but compounds have multiple
The last option all of these answer choices relate to an electrolyte
Explanation:
Acids and bases which are strong but not weak are said to be strong electrolyte.
In salts, ionic salts which are soluble are called strong electrolyte.
KOH completely dissociates when added to solvent such as water and forms its dissociated ions - K+ and OH- which gets soluble in water and becomes standardized.
The ability to conduct electricity in solution occurs when the salt or ionizable molecules dissolved, its dissociated ions can move freely in solution, allowing a charge to flow.
Therefore according to the data above all the answer choices relate to an electrolyte.
Answer:
Explanation:
Given :
Mass of a bar of lead = 115.2 g
Initial water level = 25 mL
Final water level = 35.5 mL
Difference in the water level = 35.5 - 25
= 10.5 mL
=
We know that when a body is submerged in water, it displaces its own volume of water.
Therefore, the volume of the lead bar = volume of the water displaced = 10.5 mL =
We know that mathematically, density is the ratio of mass of body to its volume.
Density of the lead bar is given by :
=
Answer:
Ag > Fe > Al
Explanation:
The values of the specific heat capacity of the elements are given as;
Aluminum = 0.897 J/g*K
Iron=0.449 J/g*K
Silver=0.235 J/g*K
Specific heat capacity basically refers to how much heat is required to change the temperature of a unit mass of a substance by a degree. Elements with high specific heat capacity would require higher energy compared to elements with lower values,
Aluminium (Al) has the highest specific heat capacity, hence it wold require more energy to cause a change in temperature. Aluminium would be the lowest.
Silver (Ag) has the lowest specific heat capacity hence it would require less energy to cause a change in temperature. Silver wold be the highest.
The middle would be iron (Fe).
The rank is given as;
Ag > Fe > Al