Which process could lead directly to the formation of pumice rock
Answers
Pumice rocks are formed due to the air that is trapped in between the rocks, a body of magma spurting out with dissolved gas under pressure. As the magma cracks through the Earth’s surface, the sudden pressure drop causes the gas to come out of the solution. The flash of gas form the vent slices the magma and blows it out as a molten lather. The lather hastily solidifies as it flies into the air and falls back to Earth as pieces of pumice.
Answer:
Pumice is formed by lava coming into contact with water. This occurs most often with volcanoes near or under water. When the hot magma comes into contact with the water, rapid cooling and rapid de-pressurization creates bubbles by lowering the boiling point of lava.
Explanation:
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According to the following reaction, how many moles of carbon monoxide will be formed upon the complete reaction of 23.1 grams of benzene (C6H6) with excess oxygen gas?benzene (C6H6) (l) + oxygen (g) carbon monoxide (g) + water (g)
Which the following accurately describes a trade-off of using nuclear energy to produce electricity?A. The energy source is renewable, but the power plant disturbs natural ecosystems by stopping the flow of rivers B. This energy source causes no pollution, but the fuel is a nonrenewable resourceC. Very little fuel is necessary to produce a large amount of energy but the waste materials are harmful to the environment. D. The fuel is inexpensive , but using the energy produces air pollution.
Answers
Answer : The number of moles of isopropanol are 1.308 moles.
Solution : Given,
Mass of isopropanol = 78.6 g
Molar mass of isopropanol = 60.1 g/mole
Formula used :
Now put all the given values in this formula, we get the number of moles of isopropanol.
Therefore, 1.308 moles of isopropanol are contained in this sample.
78.6 g ( 1mol / 60.1g) = 1.31 mol isopropanol
Answers
Organic solvents are capable of reacting with fatty acids and mixing with fatty substances but does not mix well with polar substances such as water.
Answers
From the given choices
Chlorine is a halogen existing as a diatomic gas. Iodine too is a halogen and 2 Iodine atoms held together by covalent bond. Cl - Cl bonds and I-I bonds are covalent bonds. the outer electrons of Cl and I take part in covalent bonds therefore they are fixed and not free to move about. therefore no free electrons to conduct electricity.
Sulfur is a solid that too is held together by covalent bonds so it does not have free electrons to conduct electricity.
Silver is a metal and a general property of metals are their ability to conduct electricity.
metal structure are metal ions tightly packed together. when the metal atoms are tightly packed their valence electrons are removed and delocalised. Positively charged metal ions are embedded in a sea of delocalised electrons.
therefore there are delocalised electrons that can conduct electricity
answer is 3) silver
Answers
Explanation:
Since atoms of solid aluminium can are closer to each other, therefore, when heat is supplied then transfer of energy in the form of heat will be faster.
As a result, when can is warmed up then atoms of solid aluminium can will start to vibrate more because heat will decrease the force of attraction between the molecules.
Thus, atoms will start to move away from each other and hence, they will vibrate more.
Answer:
the atoms will vibrate more.
Answers
vessel in which it is kept.
(b)A gas exerts pressure on the
walls of the container
(c) A wooden table should be
called a solid
(d) We can easily move our hand
in air but to do the same
through a solid block of wood we need a karate
expert
we need a karate expert.
Answers
Answer:
A.A gas exerts pressure on the walls of the container. Reason: They have high kinetic energy and negligible force of attraction to move constantly moving with high speed in all directions. ... These collisions of the gas particles with the container walls exert pressure on the walls of the container.
B A gas exerts pressure on the walls of the container due to imapact of its gas molecules with hight velocity .
C.A wooden table should be called a solid. Reason: It has a definite shape and volume. It is very rigid and cannot be compressed, i.e., it has a solid characteristic.
D.We can easily move our hand in air but to do the same through a solid block of wood we need a karate expert. It is because the molecules of air has less force of attraction between them and a very small external force can separate them and pass through it.
Explanation:
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