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  • Science
    In this question, V = 0.330 l T = 293 K and n = 0.075 moles As you rightly stated, we can use the ideal gas law (PV = nRT) to determine the total pressure exerted by the gas on the container. And...

    Asked by giuliawwdc 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
    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
    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...

    Asked by abdulmoez15 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
    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
    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
    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

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  • 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
    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.

  • Science
    If our speed increases three times, our kinetic energy increases by a factor of nine, that is, our kinetic energy increases nine times. The kinetic energy is a form, of mechanical energy and it is...

    Asked by enotes on via web

    1 educator answer.

  • Science
    A salt can be produced by titration under two conditions: 1. If it’s soluble so that it precipitates out of solution. 2. If there’s a change in pH, color or conductivity that allows for...

    Asked by user4051659 on via web

    1 educator answer.

  • Science
    If the output power of the light source is P = 0.1 Watt, the intensity of the light at the location of the potassium foil (d = 0.5 meters away) will be `I = P/(4pid^2) = 0.1/(4pi(0.5)^2) = 0.032...

    Asked by user2375185 on via web

    1 educator answer.

  • Science
    Organic compounds are compounds that contain carbon. There are a very large number of organic compounds around us, including those contained in our very own bodies and those in plants, animals,...

    Asked by gradztabala on via web

    1 educator answer.

  • Science
    A number of additives are commonly added in our food items. The most common additives, probably, are the preservatives. These are additives that will ensure a longer life for the food item. Color...

    Asked by enotes on via web

    1 educator answer.

  • Science
    According to the law of reflection of light, angle of incidence and angle of reflection are always equal. Angle of incidence is the angle made by the incident ray of light with a normal drawn to...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Sun is our star and is the source of life on Earth. It keeps the Earth warm enough and provides sunlight to plants for making food and oxygen. The Sun has 3 layers, known as the core, radiative...

    Asked by user7474839 on via web

    1 educator answer.

  • Science
    The best way to understand this is through an easy experiment. While driving, take a look at the needle gauge in your car's speedometer. You will notice that when you look at it directly from...

    Asked by enotes on via web

    1 educator answer.

  • Science
    We can use equations of motion to solve this problem. Using `v^2 = u^2 + 2as` for the part where the ball drops from the height of 3 m, we can calculate the ball's velocity as it hits the ground....

    Asked by mtshii on via web

    1 educator answer.

  • Science
    Reactivity is a measure of the reaction potential of an element. In other words, reactivity of an element tells us the likelihood of an element reacting with another element. For example, an...

    Asked by stephie28 on via web

    1 educator answer.

  • Science
    Tartaric acid is a small molecule that is very soluble in water. If you have a simple mixture of tartaric acid in water then the simplest method is to simply evaporate the water by boiling it...

    Asked by user6259586 on via web

    1 educator answer.

  • Science
    Designer babies are babies specifically 'designed' by using genetic engineering to contain some specific traits. These traits could pertain to intelligence, hair color, eye color, health, etc. This...

    Asked by user4271069 on via web

    1 educator answer.

  • Science
    Half life of an element refers to the time period over which half of the original amount of element will degrade and we will be left with only 50% of the original amount. For example, if the half...

    Asked by dashkalove97 on via web

    1 educator answer.

  • Science
    Fishes constitute three of the seven classes of vertebrates (the others being amphibian, reptiles, birds and mammals). Fishes are different from the other vertebrates because they have gills for...

    Asked by user1093667 on via web

    1 educator answer.

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