Explanation:
KOH + 2H2SO4 ======> 2K2SO4 + H20
![3 \: mol \: s \: \times \: \frac{4 \: mol \: k}{2 \: mol \: s} \: = 12 \: mol \: k](https://tex.z-dn.net/?f=3%20%5C%3A%20mol%20%5C%3A%20s%20%5C%3A%20%20%5Ctimes%20%20%5C%3A%20%20%5Cfrac%7B4%20%5C%3A%20mol%20%5C%3A%20k%7D%7B2%20%5C%3A%20mol%20%5C%3A%20s%7D%20%5C%3A%20%20%20%3D%2012%20%5C%3A%20mol%20%5C%3A%20k)
Answer:
A feasible error could have been the removal of the sample before all water evaporated.
Explanation:
In order to determine the percentage of water in an hydrate, an experiment that could be performed is the heating of the sample until the mass does not change. If the student heated the sample an insufficient amount of time, water will be present in the sample, thus reducing the percentage reported.
Answer:
Kinetic energy is the energy of motion. An object that has motion - whether it is vertical or horizontal motion - has kinetic energy. There are many forms of kinetic energy - vibrational (the energy due to vibrational motion), rotational (the energy due to rotational motion), and translational (the energy due to motion from one location to another). To keep matters simple, we will focus upon translational kinetic energy. The amount of translational kinetic energy (from here on, the phrase kinetic energy will refer to translational kinetic energy) that an object has depends upon two variables: the mass (m) of the object and the speed (v) of the object. The following equation is used to represent the kinetic energy (KE) of an object.
KE = 0.5 • m • v2
where m = mass of object
v = speed of object
This equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. For a threefold increase in speed, the kinetic energy will increase by a factor of nine. And for a fourfold increase in speed, the kinetic energy will increase by a factor of sixteen. The kinetic energy is dependent upon the square of the speed. As it is often said, an equation is not merely a recipe for algebraic problem solving, but also a guide to thinking about the relationship between quantities.
Kinetic energy is a scalar quantity; it does not have a direction. Unlike velocity, acceleration, force, and momentum, the kinetic energy of an object is completely described by magnitude alone. Like work and potential energy, the standard metric unit of measurement for kinetic energy is the Joule. As might be implied by the above equation, 1 Joule is equivalent to 1 kg*(m/s)^2.
Explanation:
The substance used for decolorization of undesirable color in a crystalline substance is powdered animal charcoal
Decolorization is the process of eliminating organic contaminants with vivid colors from the sample mixture.
Unwanted colors are removed by boiling the item with a suitable amount of powdered animal charcoal in a hot solution that has been filtered so that the charcoal may absorb the colors. The charcoal is a finely divided carbon.
Learn more about decolorization -
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Answer:
Much younger than Earth
Explanation:
The moon is believed to be much more younger than the earth.
The moon is earth's only natural satellite.
It is hypothesised that a planetary body as big as Mars collided with earth. The impact causes vapourization and hauling of materials from the earth crust and mantle.
The blasted particles and the matter were pulled together by gravity. These ones formed our satellite, the moon.
Some of the matter fell back to the earth surface.
The moon was formed after earth was formed and it is much younger than our blue planet.