<span>Which part of the electromagnetic spectrum has a higher frequency than ultraviolet light? </span>B. Gamma Rays.
Answer:
0,61 moles of potassium permanganate equal 3.67 x 10^23
Explanation:
The mole is defined as the amount of compound that contains Avogadro's number of particles (atoms, molecules, ions, electrons, etc.). Avogadro's number has a value of: 6,023 · 10e23 particles.
6,023 · 10e23 particles.---1 mol KMn04
3.67 x 10e23 particles-----x=
x= ( 3.67 x 10xe23 particles1 mol KMn04 )/6,023 · 10e23 particles=0,609 moles
Answer : the system the scientist is studying consists of the car, the humid garage and Air
Explanation:
In order to find the system, the scientist is studying, we need to take a look at what happens to different parts of a car in a humid garage.
Majority parts of the car are made of iron. In humid garage, there is moisture ( Water vapors) in the air. When iron comes in contact with oxygen from air and moisture, corrosion of iron begins. Corrosion is a reaction of iron with oxygen in presence of water which produces iron oxide which is known as rust.
Therefore we can write down the equation for the reaction that is occurring in a humid garage
Iron ( Parts of car) + Water ( humid garage) + Air ( oxygen) ⇒ Iron oxide ( Rust)
Therefore the system the scientist is studying consists of the car, the humid garage and Air
Answer: Option (c) is the correct answer.
Explanation:
As we know that density the amount of mass present in per unit volume.
Mathematically, Density =
So, it means that density is inversely proportional to volume. Hence, when there will be decrease in density of a substance then there will be increase in its volume. That is, expansion of substance will take place.
Also, boiling point of copper is 2,562 degree celsius but we are heating it up to a temperature of 95 degree celsius. This means that copper will remain in liquid state at this temperature.
Thus, we can conclude that a change which occurs in a sample of copper is that copper sample will expand.