• Is it inaccurate to report the weight of a sample to be <0.00 grams? (chemistry lab)?

    i was weighing a very small sample of a compound that i produced from an experiment. when i weighed it on a top-loading balance, it did not read at all and it just showed 0.00g my fault for not using a more sensitive balance but with the data that i have, would it be inaccurate to say that it weighs <0.00... show more
    i was weighing a very small sample of a compound that i produced from an experiment. when i weighed it on a top-loading balance, it did not read at all and it just showed 0.00g my fault for not using a more sensitive balance but with the data that i have, would it be inaccurate to say that it weighs <0.00 grams? or should i say <0.01g? i just don't want the <0.00 grams to be mistaken as a negative number when i'm just trying to say that it may have weighed 0.005 grams or something.
    11 answers · 2 weeks ago
  • What is the Purest form of carbon ?

    14 answers · 2 weeks ago
  • Chem got me confused. Please help?

    A chemist determined in a set of four experiments that the density of magnesium metal was 2.68g/cm3,1.69g/cm3,1.69g/cm3. The accepted value for the density is 1.74g/cm3. What can we conclude about the precision and accuracy of the chemist s data?l
    A chemist determined in a set of four experiments that the density of magnesium metal was 2.68g/cm3,1.69g/cm3,1.69g/cm3. The accepted value for the density is 1.74g/cm3. What can we conclude about the precision and accuracy of the chemist s data?l
    7 answers · 2 weeks ago
  • What happens when an acid and base are added to water?

    a) Acids increase both H+ and OH- ion concentrations b) Bases decrease both H+ and OH- ion concentrations c) Acids increase H+ and decrease OH- concentrations d) Bases increase H+ and decrease OH- concentrations
    a) Acids increase both H+ and OH- ion concentrations b) Bases decrease both H+ and OH- ion concentrations c) Acids increase H+ and decrease OH- concentrations d) Bases increase H+ and decrease OH- concentrations
    4 answers · 2 weeks ago
  • Ionic compound has the formula MO. The metal ion has 24 electrons. identify the metal. The answer is Fe but I don t understand why :(?

    Best answer: 24 electrons.... If it has a formula of MO, then the metal has an oxidation state of +2 since oxygen has an oxidation state of -2. And everybody "knows" that the oxidation state is the charge on an atom. So if M has 24 electrons after having lost 2, then it had to have had 26, which is iron. But most... show more
    Best answer: 24 electrons....

    If it has a formula of MO, then the metal has an oxidation state of +2 since oxygen has an oxidation state of -2. And everybody "knows" that the oxidation state is the charge on an atom. So if M has 24 electrons after having lost 2, then it had to have had 26, which is iron.

    But most of that "explanation" is a work of fiction. Let's start with the "answer" and work backwards. If the metal is iron, the bonds in FeO have only about 48% ionic character. Iron will have the same 26 electrons it has as an element except the outermost electrons of iron will be attracted to oxygen, which has a greater electronegativity.

    The bottom line is there are no 100% ionic bonds and in a compound there are no electrons actually "lost" to another element. That is an oversimplification. So while iron may have an oxidation state of +2, it won't have a charge of +2, resulting from the "loss" of two electrons. Actual loses or gains occur when the compound splits apart to form free ions.

    But beginning chemistry classes adopt the bonding dichotomy, assuming that bonds are either "ionic" or "covalent", that that electrons are either "transferred" or "shared." "Ionic" and "covalent" are the two hypothetical extremes of the bonding continuum, and can be considered "ideal" bonds. But real bonds are found along the continuum and have characteristics of both of the hypothetical, ideal bond types. This is why it is helpful to describe a bond in terms of its percent ionic character, based on differences in electronegativity, ΔEN. The following equation was suggested by Linus Pauling.
    ............... Percent ionic character = 100(1 - e^-(ΔEN²/4))

    So when we do the math for FeO, we find that the bonds are around 50% ionic and 50% covalent and that there will be no actual losses, or gains of electrons, only the formation of polar attractions within the lattice of Fe atoms and O atoms.
    5 answers · 3 weeks ago
  • How hard are levels ?

    Best answer: not so hard , but harder than gcse's
    Best answer: not so hard , but harder than gcse's
    4 answers · 2 weeks ago
  • I d prefer the answer from a male. Do you guys do these things if you re just friends or interested in being more?

    Best answer: I get the feeling that this guy may be interested. Generally when a guy likes you he will give off vibes to let you know how he feels. Guys will often do that sort of thing to test the waters to see how you feel about him. What I recommend you do is to give him some hints in return to let him know that you would... show more
    Best answer: I get the feeling that this guy may be interested. Generally when a guy likes you he will give off vibes to let you know how he feels. Guys will often do that sort of thing to test the waters to see how you feel about him. What I recommend you do is to give him some hints in return to let him know that you would like him to make a move. Doing things like complimenting him, telling him how much you enjoy his company and flirting with him are all great way of letting him know that you are interested. I really hope this helps :)
    5 answers · 2 weeks ago
  • Which of the following elements is not a solid at room temperature?

    Best answer: 3 metals and 1 inert gas. Not iron (Fe) not silver (Ag) not Aluminium (Al)
    Best answer: 3 metals and 1 inert gas. Not iron (Fe) not silver (Ag) not Aluminium (Al)
    4 answers · 3 weeks ago
  • What will water be like in 100 million degrees temperature?

    Best answer: It would not exist because the covalent bonds holding it together would be broken and the atoms of H and O would have had their electrons stripped forming plasma. At the right conditions the nuclei would fuse to form heavier elements releasing yet more energy.
    Best answer: It would not exist because the covalent bonds holding it together would be broken and the atoms of H and O would have had their electrons stripped forming plasma. At the right conditions the nuclei would fuse to form heavier elements releasing yet more energy.
    5 answers · 3 weeks ago
  • How many liters of blood are present in 8.5 pts (1qt = 946mL, 1qt = 2 pints)? take into account the rules of significant figures.?

    Best answer: You got 4.0205L but you are not sure how to incorporate sig fig rules into this
    The question as submitted has only 1 numeral , 8.5 , which contains 2 significant figures. The answer must contain 2 significant figures.
    Answer, based on your work = 4.0L That contains 2 significant figures.
    Best answer: You got 4.0205L but you are not sure how to incorporate sig fig rules into this
    The question as submitted has only 1 numeral , 8.5 , which contains 2 significant figures. The answer must contain 2 significant figures.
    Answer, based on your work = 4.0L That contains 2 significant figures.
    5 answers · 3 weeks ago
  • Can anyone please explain the shortest way of solving these typeface sums in no minutes with proper explanation????

    Can anyone please explain the shortest way of solving these typeface sums in no minutes with proper explanation????

    Best answer: Shortest way..... If you've ever spent time studying the hydrogen spectrum you already know that the energy difference between adjacent energy levels decreases as "n" increases. The reverse is also true. The greatest energy difference will be between n=1 and n=2. Therefore, for the transitions... show more
    Best answer: Shortest way.....

    If you've ever spent time studying the hydrogen spectrum you already know that the energy difference between adjacent energy levels decreases as "n" increases. The reverse is also true. The greatest energy difference will be between n=1 and n=2. Therefore, for the transitions shown in your question, n=3 to n=2 will give the maximum energy.
    4 answers · 3 weeks ago