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  • Waiting for answer How many grams are in a pound?

    ##453.6## grams There are ##453.6## grams in a pound.

  • Waiting for answer What is the oxidation state of copper in CuSO4?

    +2 The proper name for ##CuSO_4## is copper(II) sulphate - the Roman numerals denote the oxidation state for any atom which has variable oxidation states, such as transition metals. There are several ways to work this out. We could start from a knowledge that the sulphate ion has a 2- charge, so t...

  • Waiting for answer How many pints are in a cup?

    1 cup is half of a pint

  • Waiting for answer How do you calculate the weight of ethylenediamine (en) used...

    I'm a little confused by the data given, and here's why. Ethylenediamine (en), or ##(CH_2)_2(NH_2)_2##, is a weak , which implies that you've essentially performed a weak base - strong acid . Because en is dibasic, you'll have 2 equivalence points on the titration curve, and the after will b...

  • Waiting for answer What is the perimeter of a parallelogram with sides ##11/12#...

    ##49/18=2 13/18## The opposite sides of a parallelogram are ##color(blue)"parallel and equal in length"## Thus perimeter ##=(2xx11/12)+(2xx4/9)## ##=cancel(2)^1xx11/cancel(12)^6+8...

  • Waiting for answer Why are antigens bad or harmful? Why are they helpful or imp...

    They help the immune system recognize pathogens, but also prevent us from easily transfusing blood or receiving organ transplants. Antigens, basically cell markers, are used by the i...

  • Waiting for answer What is the LCM of ##31z^3##, ##93z^2##?

    ##93z^3## The LCM (Least Common Multiple) is the smallest value which each of two (or more) values divide evenly into. Dividing ##31z^2## and ##93z^3## into factors and selecting al...

  • Waiting for answer Why does the double bond in alkenes make them more reactive...

    The double bond makes alkenes more reactive than alkanes because the π bond is weak. A C=C double bond consists of one σ and one π bond. In a σ bond, the electrons are half-way be...

  • Waiting for answer How do you calculate kinetic energy in simple harmonic motio...

    The tricky part of this question is that it depends on where in the motion you are calculating the kinetic . So the way a simple harmonic pendulum works is that a mass (m) is attached to a string with a certain length (L). The pendulum hangs at rest above the ground. However, as far as the pendulum...

  • Waiting for answer How many 325 mg ibuprofen tablets can be produced from 2.50...

    We first have to convert to the same units. Let's use grams. The prefix k- (kilo) means 1000, so ##2.50 kg=2.50*1000g=2500 g## The prefix m- (milli) means 1/1000, so ##325 mg=(325/1000)g=0.325 g## Now divide: ##2500/0.325=7692.3..~~7692## tablets.

  • Waiting for answer 1/2 yard is how many feet?

    Half a yard is 1.5 feet. One yard (y) is three feet. ##y=3## To find half a yard, we must divide the equation by two. ##1/2 y=3/2## Then, we simplify. ##1/2 y=1.5## Half a y...

  • Waiting for answer Why is classification important in biology?

    Classification is important because it allows scientists to identify, group, and properly name organisms via a standardized system (Linnaeus Taxonomy); based on similarities found in the organisms DNA/RNA (genetics), Adaptations (Evolution), and Embryonic development (Embryology) to other known orga...

  • Waiting for answer How can I determine if and when a molecule has or needs a re...

    A molecule can have resonance structures when it has a lone pair or a double bond on the atom next to a double bond. Whenever you can draw two or more Lewis structures for a molecule...

  • Waiting for answer Why do cells generally have to be small in size? What will t...

    Cells by nature are small because they have to be able to work with small chemical reactions. A small cell allows easier and faster transport of materials into and out of the cell. A cell by itself is a membrane-bound shape that performs chemical activities. Therefore, they are almost useless witho...

  • Waiting for answer How do you multiply radical 2 times radical 2?

    The product is 2 Radical 2 or square root of two can be written as ##sqrt2## so ##(sqrt2)*(sqrt2)## = ##(sqrt4)## = 2 another solution: ##(sqrt2)*(sqrt2)## = ##(sqrt2)^...

  • Waiting for answer In raising a 5000N piano with a pulley system, the movers no...

    The effort force required to lift the piano is ##500 N## There are two ways to arrive at this result. First Method: The first way to think about this problem is to use the fact that is always conserved. This means the total required is the same whether we pull the piano up with or without the...

  • Waiting for answer Do epinephrine and norepinephrine exist in the body as a rac...

    Natural epinephrine is (##R##)-(-)-epinephrine, and natural norepinephrine is (##R##)-(-)-norepinephrine. The drugs, however, are often supplied as racemic mixtures. According to...

  • Waiting for answer What does the atomic number tell us?

    Besides placement on the defines the atom of the element by defining the number of protons in the atom. Carbon - Atomic Number 6 has 6 protons Nitrogen - Atomic NUmber 7 has 7 protons. The proton number and the neutron number combine to provide the atomic of the element. Carbon - 6 protons +...

  • Waiting for answer What is the chemical formula of tin(IV) oxide?

    ##SnO_2##, ##"stannic oxide"##. The oxide group, ##O^(2-)##, clearly has a ##2-## charge. For ##Sn(+IV)##, there thus must be 2 oxide groups to attain electrical neutrality.

  • Waiting for answer How do you calculate molar solubility and ksp?

    Molar solubility represents the number of moles of that can be dissolved per liter of solution before the solution becomes saturated. The solubility product constant, or , expresses the product of the of ions raised to the power of their respective stoichiometric coefficients from the equilibri...

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