The correct answer is:
Electronegativity increases up and to the right
Explanation:
Electronegativity, logo χ, is a chemical property that explains the trend of an atom to attract a shared pair of electrons towards itself.As you move from left to right across the periodic table, electronegativity increases, and as you move down the table electronegativity decreases.
b. Sr-1(ClO3)+2
c. Sr2CIO3
d. Sr(ClO3)2
Answer:
The answer to your question is letter d. Sr(ClO₃)₂
Explanation:
Data
Reactants HClO₃ and Sr(OH)₂
This is a neutralization reaction because the reactants are a base (Sr(OH)₂) and an acid (HClO₃).
The products in a neutralization reaction are always water and a salt.
Balanced chemical reaction
Sr(OH)₂ + HClO₃ ⇒ H₂O + Sr(ClO₃)₂
Answer: Petroleum
Explanation:
Petroleum is a fossil fuel. It is also called as crude oil. It is a yellowish black liquid that can be found beneath the earth crust. It is a highly combustible fuel and generates lot of heat energy necessary for running the vehicle. It is the most commonly used fuel for shipping, and road transportation of goods and services. It helps the vehicles to run for long and covering the large distance.
The food availability would be affected by the shortage in absence of petroleum.
As the barium hydroxide solution is added to the solution of sulfuric acid, the electrical conductivity of the acid solution decreases because the
(1) volume of the reaction mixture increases
(2) temperature of the reaction mixture decreases
(3) concentration of ions increases
(4) concentration of ions decreases
As the barium hydroxide solution is added to the solution of sulfuric acid, The conductivity would decrease because the concentration of ions decreases. Thus option 4 is correct.
Electric conductivity can be defined as the measure of the mechanism of electric current moves within a substance, greater the electrical conductivity within the material higher will be the current density.
The electrical conductivity is the ability of a substance that involve in conduction of electricity, the conductivity of a material is important for example the wire conductors need to let current to flow as easily.
When barium hydroxide dissolve in a solution called sulphuric acid, the Barium ions replace the hydrogen ions and an insoluble solid doesn't contribute ions.
Thus option 4 is correct.
Learn more about conductivity, here:
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Answer: Carbon-14 isotope is used to date ancient artifacts such as fossils.
Explanation:
To determine the age of ancient artifacts such as fossils, we use radiocarbon dating process.
In this process, a naturally occurring radioisotope of carbon which is Carbon-14 is used. This isotope is generally used because this isotope gets constantly created in the atmosphere with the interaction of cosmic rays with the nitrogen present in atmosphere.
Hence, an isotope of carbon which is Carbon-14 is used to determine the age of ancient artifacts such as fossils.
Answer:
Explanation: NO, because dental varnish interferes with the bonding and setting reaction of composite resins and glass ionomer restorations the use of varnish is contraindicated with these materials.
Answer: B
Explanation:
All of your answers look wrong