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  • Waiting for answer What is velocity?

    Velocity describes the speed AND direction/heading in which an object is moving. Magnitude describes the speed in which an object is moving. Example: I drove my car 65 mph today. MAGNITUDE I drove my car 65 mph south today. VELOCITY

  • Waiting for answer What is molarity, molality and normality?

    , , and normality are all units of concentration. Molarity(M) is the number of moles of dissolved in one liter of a solution and the unit for molarity is moles/L. M = ##"moles of solute"/"liters of solution"## (Note: If you are given volume in mL or some other volume unit, you need to convert i...

  • Waiting for answer Why is bromine an electrophile?

    bromine is a electrophile because it gains electron easily. Electrophile means electron loving compounds or elements or ions which are attracted to or gain electron easily. Br need 1...

  • Waiting for answer What special marks are used to show that segments are congru...

    Usually it's a line or two lines on each segment. Another way to show that segments are congruent is to have a squiggle line over an equal sign.

  • Waiting for answer What does the nucleus of an atom contain?

    ##"Nucleons, protons and neutrons"## Protons are massive, positively charged nuclear particles. Neutrons are massive, neutrally charged nuclear particles. Together these particl...

  • Waiting for answer What is the closest star to Earth besides the sun?

    Procima Centauri, at about 4.25 light-years away. Proxima Centauri is believed to be part of a three-star system whose other two stars are collectively known as Alpha Centauri. The...

  • Waiting for answer What makes the rough endoplasmic reticulum rough?

    The ribosomes on the surface. The rough endoplasmic reticulum (ER) is called 'rough' because it has organelles called ribosomes attached to the surface. Ribosomes are the organell...

  • Waiting for answer How do you write 720 as a product of its prime factors?

    ##720 = 2^4 xx3^2 xx5## You can do the "ladder method"of continuous short division, making sure that you only divide by . I prefer to just use 2 factors to start with and then split...

  • Waiting for answer How would you use the Henderson-Hasselbalch equation to calc...

    ##"pH" = 7.65## The Henderson - Hasselbalch equation allows you to calculate the of that contains a weak acid and its conjugate base by using the concentrations of these two speci...

  • Waiting for answer How do intermolecular forces affect evaporation?

    Intermolecular forces slow down the rate of evaporation. Strong intermolecular forces slow down the rate of evaporation. If the intermolecular forces in the liquid are small, the mo...

  • Waiting for answer What type of mixtures can be separated by distillation?

    where each of the components is a liquid can be separated by distillation. For example, if you have a solution containing isopropanol and water, heating it will cause the isopropanol to boil off first, leaving the water behind. You can do the same thing if you have a solid dissolved in a liquid,...

  • Waiting for answer What do the minimum, first quartile, median, third quartile,...

    They each contribute to the box plot in different ways (see below). A box and whisker plot is a method of displaying data and its distribution. The minimum is the lowest value in th...

  • Waiting for answer Myelin is found around which part of the neuron?

    Myelin sheath is the insulating covering that surrounds an axon with multiple spiral layers of myelin. The insulating covering that surrounds an axon with multiple spiral layers of...

  • Waiting for answer At what distance of separation must two 1.00-microCoulomb ch...

    ##30,3mm## From of Electrostatic forces between charged objects we get that ##F=k(Q_1Q_2)/r^2## ##therefore r = sqrt((kQ_1Q_2)/F)## ##=sqrt((9xx10^9)(1xx10^(-6))^2)/(9,8)## ##=3...

  • Waiting for answer How does heat change the density of air?

    It decreases the density of air. We know this because Charles tells us. Charles's law states that: ##(V_1)/(T_1)## = ##(V_2)/(T_2)## Where ##V_1## and ##T_1## are the initial volume and temperature of a gas, and ##V_2## and ##T_2## are the volume and temperature of the gas after it has been he...

  • Waiting for answer What levels of organization are missing in sponges?

    Tissues, organs and systems Sponges lack true tissues. In due to that they also can't form organs and systems like we do. The phylum Porifera is a group of Metazoan animals. Tissue...

  • Waiting for answer How can chemical properties be used to identify substances?

    A chemical property is any of a material's properties that becomes evident during a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity. Chemical properties cannot be determined just by viewing or touching the substance; the substance's i...

  • Waiting for answer How can you use the solubility product constant to calculate...

    The , ##"K"_("sp")##, represents the product of the of its dissolved ions raised to the power of their respective stoichiometric coefficients determined from the equilibrium reaction. Since you're dealing with a sparingly soluble , ions are released when the compound is placed in water. This is what...

  • Waiting for answer How many p orbitals are there in a neon atom?

    Three. Your tool of choice for this problem will be neon's . Neon, ##"Ne"##, is located in period 2, group 18 of the , and has an equal to ##10##. This means that a neutral neon at...

  • Waiting for answer How many significant figures are there in the measurement 23...

    Six . The first things to look for here are non-zero digits , which as you know are always significant. This measurement has a total of ##5## non-zero digits ##2,3,8,2,3##...

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