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  • Science
    Gas chromatography (also commonly called GC) is a method of analyzing chemical samples for purity. Different chemical components within a sample injected onto a GC will separate and read as...

    Asked by user3411823 on via web

    1 educator answer.

  • Science
    Atoms are composed of tiny particles called subatomic particles. The three main subatomic particles in the atom are: Protons: Protons are positively charged and are located in the nucleus of the...

    Asked by kjeevani1410 on via web

    1 educator answer.

  • Science
    1) The molar mass of CO2 = 12.1 g/mol + 2(16.0 g/mol) = 44.1 g/mol 2) Knowing the molar mass allows you to use the rms velocity equation to calculate temperature: `rms =sqrt((3RT)/M)` Where R =...

    Asked by clashcece3 on via web

    1 educator answer.

  • Science
    So sorry about that and thanks for catching the mistake. With 0.075 moles, the total number of atoms = `0.075 xx 6.023 xx 10^23` = `4.52 xx 10^22` atoms. and thus, pressure exerted by each atom =...

    Asked by giuliawwdc on via web

    2 educator answers.

  • Science
    Groups and Periods: The modern periodic table is arranged in rows and columns. The rows are called periods and the columns are called groups. Periods: The periods (rows) of the periodic table...

    Asked by enotes on via web

    1 educator answer.

  • Science
    An ore is rock that contains valuable minerals in concentrations that can be economically extracted so C is the correct answer. Ores are mined from the earth, crushed and refined to produce...

    Asked by luvbunny1812 on via web

    1 educator answer.

  • Science
    Carbon is Absorbed by Plants Plants absorb carbon (C), in the form of carbon dioxide (`~CO_2` ), into their cells from the atmosphere. The plants then use the absorbed `~CO_2` in the chemical...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Gram molecular mass of a substance is the amount (in grams) that will make up one mole of that substance. This is also equal to the mass of each individual atom in molecule. To determine the gram...

    Asked by deadpool722727 on via web

    1 educator answer.

  • Science
    If the number of atoms of helium gas are doubled, the moles of gas are also doubled. We can find the number of moles of a gas, by using the idea that each mole of a gas contains an Avogadro's...

    Asked by user214975 on via web

    1 educator answer.

  • Science
    Biosphere is composed of all the living organisms, including, plants, animals, etc. Biosphere is one among the four spheres of Earth, the others being, atmosphere, lithosphere and hydrosphere....

    Asked by enotes on via web

    1 educator answer.

  • Science
    Deforestation and desertification are closely related. Deforestation is the practice of cutting down trees. And desertification is the development of desert like conditions in place, where none...

    Asked by vijaykumarsis95 on via web

    1 educator answer.

  • Science
    Between the years 1960 and 2007 there was an increase in world population from about 3 billion to about 6.6 billion people. The increase in 47 years was 3.6 billion; in other words the population...

    Asked by enotes on via web

    1 educator answer.

  • Science
    The atomic radius of an atom is the distance between the nucleus of an atom to its outermost electron. Atomic radius is an example of a periodic trend. Periodic trends are patterns of properties...

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  • Science
    Yes. Liverworts, mosses, and hornworts look different from one another. Each type of plant has a unique set of physical characteristics, as explained below. Liverworts have thorny leaves that do...

    Asked by user4812895 on via web

    1 educator answer.

  • Science
    The collision theory states that a reaction occurs when the collision between molecules cause old bonds to become broke and new bonds to form. However, the collisions must occur with enough energy,...

    Asked by bibi224 on via web

    1 educator answer.

  • Science
    "A 1000 W microwave" means that the microwave uses the power of 1000 Watts when it is on. Power is the rate of the consumption of energy: `P = (Delta E)/(Delta t)` , assuming the energy is consumed...

    Asked by sarianahall22 on via web

    1 educator answer.

  • Science
    A volcano is a geologic formation from which molten rocks (lava) and hot gases emerge onto the surface of the planet. Typically a volcano is a mountain from which molten material is emitted. It can...

    Asked by awesomealmakatana on via web

    1 educator answer.

  • Science
    Degeneracy pressure is created when any further compression of a star would force electrons to occupy the same quantum state, which is not possible for this type of particle. The contraction of...

    Asked by bob3245654635 on via web

    1 educator answer.

  • Science
    Our planet, Earth, has a spherical shape. However, it is not a perfect sphere and the presence of valleys and mountains make it somewhat rough. In addition, the Earth has slight bulge near the...

    Asked by jandresd22 on via web

    1 educator answer.

  • Science
    A runner runs 100 meters in 12 seconds and we are asked to find the average speed. The average speed is the total distance divided by the total time over some interval. This is the rate of change...

    Asked by user104621 on via web

    1 educator answer.

  • Science
    Zero. A bit fat 0. The reason it's called the "Hadean eon" is after Hades, which is the Greek word for the underworld---it's meant to invoke fire and brimstone, because that's what the world was...

    Asked by autumnkpinkme on via web

    1 educator answer.

  • Science
    Cell can mean different things, depending upon which specific discipline of science we are talking about. In biology or microbiology, we refer to cell as the basic structural unit of all the living...

    Asked by saniad70 on via web

    1 educator answer.

  • Science
    Typically, the word "interior" is used to mean "inside." For example, when we are discussing various cell organelle (specialized structures that carry out specific functions), we commonly use the...

    Asked by ninaalaboyy823 on via web

    1 educator answer.

  • Science
    The process of phosphorylating ADP to form ATP and removing a phosphate from ATP to form ADP in order to store and release energy respectively is known as the ATP cycle. ATP stands for adenosine...

    Asked by user8441766 on via web

    1 educator answer.

  • Science
    Hello! Let's count a height from the level of the water surface. Then the height of the water surface is zero and the height of your hand is `H_0=5m.` Also we'll ignore air resistance. The height...

    Asked by animeotaku1107 on via web

    1 educator answer.

  • Science
    Organelle are structures within cells that have specialized functions. Some of the key organelle in an animal cell are nucleus, mitochondria, golgi apparatus, cell membrane, endoplasmic recticulum,...

    Asked by alexmay123123 on via web

    1 educator answer.

  • Science
    Well, since I believe your question is not so informative I will make some assumptions and try to answer you based on them.1) If by area you mean the area of an arbitrary "real" surface. In this...

    Asked by user9167629 on via web

  • Science
    The force that squeezes a material is a compression force. Think of what happens when we squeeze a spring. We are actually applying a compression force on the spring. Any object kept on the...

    Asked by user9736763 on via web

    1 educator answer.

  • Science
    All rocks have minerals in them. In fact, a rock is defined as a rock or a stone that is a conglomerate of one or more minerals. A mineral is a naturally occurring inorganic solid that has a...

    Asked by santareyes24 on via web

    1 educator answer.

  • Science
    A number of factors affect the size of waves. These include wind speed, duration, water depth, distance of wind travel over open water or fetch, direction of tide, speed of tide, etc. Higher wind...

    Asked by aishaamaw on via web

    1 educator answer.

  • Science
    A Keggin unit (also known as a Keggin structure) is the naturally occurring form of various oxo-metallic acids. The acids in question are not simple acids like HCl or HBr, but complex chemical...

    Asked by missmarple on via web

    1 educator answer.

  • Science
    A star’s apparent brightness is not the same as its absolute brightness. The following definitions were provided by the Chandra X-ray Observatory’s glossary that was published by Harvard. A...

    Asked by enotes on via web

    1 educator answer.

  • Science
    The best choice to identify carbon dioxide gas is the limewater test. Limewater is an aqueous solution of calcium hydroxide. When CO2 is bubbled through lime water a precipitate of calcium...

    Asked by sararobideaux on via web

    1 educator answer.

  • Science
    Any material can be classified as either an element, a compound or a mixture, depending on its properties. An element is composed of identical atoms and cannot be further divided. An example is...

    Asked by enotes on via web

    1 educator answer.

  • Science
    The speed of light is the theoretical limit to the speed of an object. In fact, no object can reach the speed of light. Think about the scenario using Newton's Second Law of Motion which states...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Hello! Yes, instantaneous speed and average speed can be equal (and can be different). The simplest case is when a body has a constant speed. In this case, its instantaneous speed is the same at...

    Asked by enotes on via web

    1 educator answer.

  • Science
    DNA or deoxyribonucleic acid is an essential constituent of all living organisms and contains the genetic information necessary for the propagation of life. Every cell contains DNA molecules. In...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Atoms that have net electric charges are called ions. Positive ions are called cations and negative ions are called anions. Atoms have two types of charged particles: Protons have a positive charge...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Refrigeration is the process by which an object is kept below room temperature. Refrigeration is a method that allows humans to preserve many items. A large benefit to refrigeration is preserving...

    Asked by enotes on via web

    1 educator answer.

  • Science
    The question asks you to determine what percent of the total mass of the compound sulfur dioxide (`~SO_2` ) is due to the mass of the S atom. In order to determine the percent by mass of S in the...

    Asked by enotes on via web

    1 educator answer.

  • Science
    If a substance has a high melting point, it is probably an ionic compound. Ionic compounds often have high melting and boiling points because ionic substances are held together by very strong...

    Asked by enotes on via web

    1 educator answer.

  • Science
    The chemical formula of a compound indicates the number and type of atoms present in the compound. The chemical formula for sucrose is `~C_12H_22O_11` . The letters in the formula are the symbols...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Fish are the first vertebrates that evolved on Earth. A vertebrate is an animal that has a backbone. Fish include animals with backbones that are adapted to live in water using specialized gills to...

    Asked by enotes on via web

    1 educator answer.

  • Science
    For the mentioned reaction, the balanced chemical equation is: `` The reactants are hydrochloric acid (HCl) and sodium hydroxide (NaOH) and the products are sodium chloride and water. We can use...

    Asked by gabbiesaboss1738 on via web

    1 educator answer.

  • Science
    First of all, carbon dioxide is a gas so you will need to have a supply of it contained in a pressurized metal gas cylinder fit with a gas regulator. The pressure aspect of working with gasses...

    Asked by user5902256 on via web

    1 educator answer.

  • Science
    Forensics is used, generally, in criminal and civil lawsuits. Forensics or forensic science is the collection, preservation and analysis of evidence. The information so obtained is then used in a...

    Asked by nykeyagray10 on via web

    1 educator answer.

  • Science
    Fluorine (`~F_2` ) reacts with hydrogen (`~H_2` ) to form the compound hydrogen fluoride (`~HF` ) as shown in the reaction below: `~F_2 + ~H_2 -gt 2HF` The bonds formed between H atoms and F atoms...

    Asked by enotes on via web

    1 educator answer.

  • Science
    As the particles in a substance are heated, the density of the substance decreases. Heat is the total amount of energy possessed by the particles that make up a substance. Oftentimes, the addition...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Ethanol is being increasingly used in our transport fuels, especially gasoline as an additive. It is most commonly produced from biomass such as sugarcane, corn, switchgrass, etc. An increase in...

    Asked by enotes on via web

    1 educator answer.

  • Science
    The extreme temperatures on Moon are due to the lack of atmosphere. Moon has an average daytime temperature of about 100 degrees C and a night time temperature, as low as -173 degrees C. The lack...

    Asked by enotes on via web

    1 educator answer.

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