(2) Aluminum reacts with sulfuric acid.
(3) Aluminum conducts an electric current.
(4) Aluminum has a density of 2.698 g/cm3 at STP.
The correct answer as to which statement describes a chemical property of aluminum would be that it reacts with sulfuric acid.
There are two properties of every substance - physical and chemical properties.
Physical properties refer to the characteristics that can be observed without altering the substance while chemical properties refer to the characteristics of undergoing chemical changes in reactions.
Physical properties include color, boiling and melting point, hardness etc., while chemical properties include reactivity, toxicity, flammability, etc.
All the options have to do with physical properties of aluminum except its reactivity with sulfuric acid. The equation of reaction is as follows:
Al + H2SO4 ---> Al2(SO4)3 + H2
More on the chemical properties of aluminum can be found here: brainly.com/question/536562
moles Cu produced : 0.002
Concentration of copper sulfate (CuSO₄) : 0.319 g/dm³
MW CuSO₄ :
mol CuSO₄ /dm³ :
CuSO₄⇒Cu²⁺ + SO₄²⁻
mol Cu : mol CuSO₄ = 1 : 1 , so mol Cu²⁺=0.002
Water is considered a universal solvent due to its polar nature, which enables it to dissolve ionic compounds and polar molecules. This is because water's charged particles form hydrogen bonds with surrounding water molecules, creating hydration shells that keep the solute particles dispersed. This unique property allows water to dissolve a variety of substances.
Water is considered a universalsolvent because of its polar nature. Being polar, water has slight positive and negative charges, making it capable of dissolving ionic compounds and polar molecules. These charged particles form hydrogen bonds with water molecules, forming hydration shells that keep the solute particles separated or dispersed in the water. This ability of water to dissolve a wide range of substances makes it a universal solvent.
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b) Fe₂(SO₄)₃
c) Fe₂(SO₃)₃
d) Fe₂SO₄
e) Fe₂SO₃
Answer :
The parent and daughter concentrations (in percentages) is, 60 % and 40 % respectively.
The age of rock is
Explanation :
First we have to calculate the parent and daughter concentrations (in percentages).
and,
As we know that, the half-life of uranium-238 = years
Now we have to calculate the rate constant, we use the formula :
Now we have to calculate the time passed.
Expression for rate law for first order kinetics is given by:
where,
k = rate constant =
t = time passed by the sample = ?
a = initial amount of the reactant = 3 g
a - x = amount left after decay process = 1.8 g
Now put all the given values in above equation, we get
Therefore, the age of rock is