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What is the molar mass of pentane?

Pentane, represented by the molecular formula C5H12, contains five atoms of carbon and 12 atoms of hydrogen. Since the atomic weight of carbon is about 12.01, the total mass of carbon in pentane is 60.05 grams per mole, differing slightly depending on rounding. Each atom of hydrogen has a mass of about 1.01 which gives a total mass of about 12.12 grams per mole for 12 atoms of hydrogen. When accounting for rounding differences, the two values add together to total about 72.15 grams per mole for each molecule of pentane.

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What is the difference between phagocytosis and pinocytosis?

Phagocytosis can be performed by certain single-celled organisms like the amoeba or by one of the human body's cells, such as a white blood cell. An organism like the amoeba uses phagocytosis as a form of feeding. In contrast, the white blood cells use phagocytosis as a defense mechanism against bacteria, viruses, dust particles and other foreign bodies. During the process of phagocytosis, the particle and the cell, or phagocyte, must first adhere to each other. This is accomplished in various ways, depending on the chemical makeup of the particle's surface. Once they have adhered to..

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How does genetics affect blood type?

Humans have two blood type genes, according to Baylor Scott & White Health. Each parent passes one of these on to his offspring. For blood type O to occur, both parents must have at least one O gene. The O blood type only occurs when a child inherits O from both parents. When a child inherits A and O or A and A, his blood genes are AO or AA, respectively, and his blood type is A. When a child inherits B and O or B and B, his blood genes are BO or BB, respectively, and his blood type is B. When a child inherits A and B, his blood genes and blood type are AB.\nBlood type is important in medicine..

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What are the products of incomplete combustion?

Complete combustion of a hydrocarbon fuel results in very few byproducts, primarily carbon dioxide and water along with a few oxides. If there is not enough oxygen for complete combustion, or a heat sink of some sort interferes with the combustion process, the fuel does not burn completely. This partial oxidation of hydrocarbons results in molecules that are not completely broken down, releasing potentially toxic substances into the atmosphere.\nOne common method of reducing these potentially toxic byproducts involves either burning the exhaust products in an afterburner or using a catalyst to..

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What is the speed of light traveling through air?

The speed of light in a vacuum is equal to 670,600,000 miles per hour. The fastest medium in which light can travel is through no matter, which is a vacuum. Any matter slows light down, but the degree to which is slows light is determined by the medium itself. The index of refraction of air is 1.0003, which is substantially lower than solids or liquids.

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What is a simple explanation of the E=mc2 equation?

In other words, if an object of one kilogram had its mass converted to energy, the resulting explosion would release 90 billion joules of energy. Nuclear weapons have only a small amount of their mass converted to energy, with the rest lingering as fissioned atoms and radioactive particles. The only known way to achieve a 100% conversion of mass to energy would be to bring matter into contact with a corresponding amount of antimatter.\nThe E in the equation refers to resting energy, or the energy that exists in the object even when it isn't in motion, being heated or otherwise irradiated ..

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Why is litter a problem?

When trash is thrown from a car, it may hit another car's windshield — a distraction that could cause an accident. Running over litter or trying to avoid litter can also lead to vehicle accidents. According to Don't Trash Arizona, about 25,000 car accidents each year are a result of litter on roads.\n\nLitter can be harmful to animals, who may try to swallow pieces of trash or become entangled in it. These situations can lead to death. Decomposing litter can contaminate water supplies as well as harming plant life.\n\nIt costs the government billions of dollars every year to get li..

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What is a cord of wood?

The word "cord" is sometimes used loosely by firewood dealers. Most firewood is sold in pieces of 12 to 16 inches in length, suitable for a home fireplace or wood-burning stove. A 4 by 8 foot stack of 16 inch firewood, sometimes called a "face cord," is only about a third of an actual cord in volume.

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How are echinoderms and chordates related?

All echinoderms are marine. Many chordates, including humans, live on land. Examples of echinoderms include brittle stars, sand dollars, sea stars, sea lilies, sea urchins and sea cucumbers. Most chordates, though not all, are vertebrates. All amphibians, birds, fish, lampreys, mammals and reptiles are chordates. Invertebrate chordates have two different types: the tunicates and the lancelets. The tunicates are also known as sea squirts.

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How does faulting occur?

Deep under the surface, rock can get very hot and soft. The movement of this layer relative to the surface puts stress on the uppermost layers of rock. Rock near the surface tends to be cooler and less malleable, which allows the stress from underneath to build until the surface rock cracks. The point of fracture can be very narrow, sometimes it's only a few inches wide, but the surrounding rock is usually distorted from the force of the movement.\nFault lines can be unpredictable. Depending on the composition of the local rock and the stress it's under earthquakes can be frequent or..

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