Answer:
A compound is a chemical substance made up of two or more
different chemical elements. An element is a pure substance made up
of only one chemical.
Answer:Noble gases:
are highly reactive.
react only with other gases.
do not appear in the periodic table.
are not very reactive with other elements.
Explanation:Noble gases:
are highly reactive.
react only with other gases.
do not appear in the periodic table.
are not very reactive with other elements.
Answer:
Explanation:
Atomic weight of strontium ( Sr ) is 88 .
Atomic weight of Beryllium ( Be) is 9 .
Both are bivalent .
2 x 96500 coulomb is required to decompose 88 g of Sr .
88 g of Sr requires 2 x 96500 coulomb of charge
20 g of Sr will require 2 x 96500 x 20 / 88 coulomb of charge
coulomb of charge required = 43863.63 coulomb .
9 g of Be requires 2 x 96500 coulomb of charge
2 x 96500 coulomb of charge gives 9 g of Be
43863.63 coulomb .of charge gives 9 x 43863.63 / (2 x 96500 ) g of Be
= 2.04 g.
Answer:
Following is the correct description of the problem.
Explanation:
- Electricity flows through all the cathode(from the anode via the outer wire).
- Reduction takes place at the cathode (electron benefit).
- The cathode electrode seems to be positive as well as the anode negative.
- 2H₂O + 2e → H₂ + 2OH⁻ (In this, there's really a rivalry between potassium as well as hydrogen ions, but mostly because hydrogen requires potential benefits for reduction or potassium requires negative ability to reduce hydrogen to hydrogen throughout the best possible method. Potassium oxidizes stronger than its ions).
Answer: The temperature of the gas in the tire if the pressure in the tire increases to 87.3 kPa is
Explanation:
To calculate the final temperature of the system, we use the equation given by Gay Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant volume.
Mathematically,
where,
are the initial pressure and temperature of the gas.
are the final pressure and temperature of the gas.
We are given:
Putting values in above equation, we get:
Thus the temperature of the gas in the tire if the pressure in the tire increases to 87.3 kPa is