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How do you calculate heat of reaction?

Balance the given chemical equationIf given the chemical formula for the combustion of cellulose, C6H10O5 + O2 -> CO2 + H2O, it would be balanced as C6H10O5 + 6(O2) -> 6(CO2) + 5(H2O).Find the heat of formation for the species of the reactionThe heat of formation is an experimentally determined value and is found in the back of many science textbooks and online. For cellulose, the heat of formation is -1250 kJ/mol, O2 is 0 kJ/mol, CO2 is -393.5 kJ/mol and H2O is -241.8 kJ/mol.Calculate the equation for the heat of reactionPutting the coefficients and heat of formation values together, the equa..

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How do air masses move?

An air mass is an extensive region of air that possesses similar moisture and temperature readings. Air masses form when air sits still in a region for several days or weeks, according to meteorologist Jeff Haby. When the upper level winds of the jet stream encounter the air mass, they guide cooler masses to the lower latitudes and warmer masses towards the higher latitudes. As the air mass moves, it acquires the characteristics of the area it covers, either warming up or cooling off, for instance, before moving again in response to the upper level winds. An air mass may modify several times o..

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What are examples of thermal energy?

Thermal energy is harvested and used by humans in items such as car engines and refrigerators and in the burning of fossil fuels to generate electricity. The more matter that exists within a system, the more particles are permitted to move, allowing them to have more thermal energy. For example, a small bowl containing boiling water contains less thermal energy than a large pool at body temperature. James Prescott Joule gave a lecture in 1847 in which he defined terms related to thermal energy such as sensible and latent heat.

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Does iron react with hydrochloric acid?

FeCl2, or iron(II) chloride, is a paramagnetic solid with a high melting point and off-white appearance. According to the Royal Society of Chemistry, iron(II) chloride is also soluble in water and gives aqueous solutions a yellowish color. Dihydrogen, or hydrogen gas, is highly flammable and burns in the air at a wide range of concentrations.

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What is an enriched media in microbiology?

A culture medium is used for the growth, storage and transport of microorganisms in the laboratory. It can be solid or liquid. Fastidious organisms will not grow without specific nutrients, so the media must be enriched to encourage their growth. For example, blood agar is used to grow bacteria, such as several species of streptococcus. Chocolate agar is a medium comprised of hemoglobin and other supplements, which is used to isolate Haemophilus and Neisseria.

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What is the molecular geometry of CH4?

Within the structure of methane, hydrogen atoms form a 109.5 degree angle with the carbon atom. Methane is an alkane and is an abundantly occurring natural gas. Its primary usage is as a fuel and is both odorless and colorless. Methane is a greenhouse gas as it is very effective at retaining heat within the Earth's atmosphere.

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What are organisms that make their own food called?

Green plants and bacteria can fall under this category. These organisms create their own food through photosynthesis. They are the basis for most ecological systems. Without producers, consumers like humans, would not have the food or energy they need to survive. These plants use the sunlight to make energy to fuel their functions. These plants also produce oxygen for other organisms to use. Photosynthesis is also assisted by carbon dioxide. By the plants absorbing the carbon dioxide, it helps clean the air and leave less harmful elements in the air to be breathed in. Not only do these produce..

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What are some ideas for Mole Day?

Associating parties and celebration with learning helps students develop a positive association with education. A Mole Day party should have many of the common elements of a party: snacks, drinks and a casual atmosphere throughout the class period. Use the mole animal as a mascot for the party by bringing in a stuffed mole, or placing pictures of them throughout the classroom. Play chemistry trivia games during the party to work in some study practice along with some fun.\nBaking is a fun way to celebrate Mole Day because students enjoy eating the final products. A mole-shaped cake or molasses..

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Which features are common to prokaryotic and eukaryotic cells?

Neither prokaryotes nor eukaryotes violate any of the basic features required for life as humanity knows it, and so in truth they have much more in common with each other than they have differences. Each must metabolize energy sources and generate ATP. Each uses chemical sensors to react to its environment. Each is dependent on a relatively narrow range of environmental conditions to maintain homeostasis and thrive. Both are part of ecosystems where they behave as either producers or consumers.\nAs much as the two cell types have in common, however, there are some aspects which are unique to e..

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How do you avoid static electricity?

Safeopedia.com and Sciencemadesimple.com offers a variety of suggestions to reduce static electric shock. In places where the air is dry, utilize a humidifier. Wear clothing that is made of natural fibers, such as cotton, and avoid wearing wool. Wear shoes that have leather soles. Keep skin moisturized. Cover furniture with material made of natural fibers. Ground yourself prior to touching metal objects like door knobs. This can be done by touching a wooden object, or as Sciencemadesimple.com suggests, carry change in your pocket to handle prior to touching the door knob, or other metal.

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