Answer : The sample undergoes the greater heat change is, aluminum.
Explanation :
Specific heat capacity : It is defined as the amount of heat absorbed by one gram of a substance to raise its temperature by one degree Celsius.
Formula used for specific heat capacity :
where,
C = specific heat capacity
m = mass of a substance
q = heat required
= change in temperature of substance
As we know that the heat change is directly proportional to the specific heat capacity at constant temperature and mass that means higher the specific heat capacity, the higher will be the heat change and vice-versa.
The specific heat capacity of iron and aluminum is, 0.449 J/g.°C and 0.903 J/g.°C respectively.
From this we conclude that the specific heat capacity of aluminum is greater than iron. So, aluminium sample undergoes the greater heat change.
Hence, the sample undergoes the greater heat change is, aluminum.
An ionic chloride will be formed between element C and chlorine which will boil at 987 C.
<h3>
What is an ionic compound?</h3>
An ionic compound is a compound that is composed of ions rather than molecules. One of the hallmarks of ionic compounds is that they have a high melting and boiling point.
As such, the compound that forms a chloride that is ionic in nature is element C having a boiling point of 987 C.
Learn more about ionic compound:brainly.com/question/9167977?
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Answer: B. a chemical change
Explanation:
Answer:
H₂O + CO₂ → H₂CO₃
Option D is correct.
Law of conservation of mass:
According to this law, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
Now we will apply this law to given chemical equations:
A) H₂ + O₂ → H₂O
There are two H and two O atoms present on left side while on right side only one O and two H atoms are present so mass in not conserved. This option is incorrect.
B) Mg + HCl → H₂ + MgCl₂
In this equation one Mg, one H and one Cl atoms are present on left side of equation while on right side two H, one Mg and two chlorine atoms are present. This equation also not follow the law of conservation of mass.
C) KClO₃ → KCl + O₂
There are one K, one Cl and three O atoms are present on left side of equation while on right side one K one Cl and two oxygen atoms are present. This equation also not following the law of conservation of mass.
D) H₂O + CO₂ → H₂CO₃
There are two hydrogen, one carbon and three oxygen atoms are present on both side of equation thus, mass remain conserved. This option is correct.
Answer:
The answer to your question is below
Explanation:
a) HCl 0.01 M
pH = -log [0.01]
pH = - (-2)
pH = 2
b) HCl = 0.001 M
pH = -log[0.001]
pH = -(-3)
pH = 3
c) HCl = 0.00001 M
pH = -log[0.00001]
pH = - (-5)
pH = 5
d) Distilled water
pH = 7.0
e) NaOH = 0.00001 M
pOH = -log [0.00001]
pOH = -(-5)
pH = 14 - 5
pH = 9
f) NaOH = 0.001 M
pOH =- log [0.001]
pOH = 3
pH = 14 - 3
pH = 11
g) NaOH = 0.1 M
pOH = -log[0.1]
pOH = 1
pH = 14 - 1
pH = 13
