The normal recipe for preparing Kool-Aid® calls for adding the entire package and 1 cup of sugar to 2 quarts of water. Calculate the volume percent of this solution and determine which of your samples is the closest to the concentration of the recommended preparation. Again, assume that the weight of the drink mix is 0.0 g. The total volume of the solution is 8 and 2/3 cups.
hmmmmmm let me think
density is mass over volume. the density of iron is given in g/cm³
we have to first convert g/cm³ to kg/dl.
1000 g = 1 kg and 100 cm³ = 1 dl
the mass of 1 cm³ = 1 g
the mass of 100 cm³ / 1 dl = 100 g
then mass of 1 dl in kg is = 100 g / 1000 g/kg = 0.1 kg
volume of 0.1 kg is 1 dl
therefore density of iron is 7.86 g/cm³ x 0.1 kg/dl / g/cm³ = 0.786 kg/dl
volume of iron having mass 0.786 kg is 1 dl
then volume of iron having a mass of 4.62 kg is - 1 dl / 0.786 kg x 4.62 kg = dl
volume of iron is 5.88 dl
note that the group number in this answer refers to the new iupac group number, which ranges from 1 to 18. counts from the left. start with the first two column (group 1 and 2), go on to the transition elements (sc, ti, etc. in group 3 through 12), and continue with the nonmetals (group 13 through 18).
li is a group 1 metal. as a metal, it tends to form positive ions ("cations"). metals in group 1 and 2 are main group metals. the charge on main group metal ions tends to be the same as the group number of the metal. li is in group 1. the charge on an li ion will be +1. formula of the li ion will be .
br is a group 17 nonmetal. as a nonmetal, it tends to form negative ions ("anions"). the charge on nonmetal ions excepting for h tends to equal the group number of the nonmetal minus 18. br is in group 17. the charge on a br ion will be 17 - 18 = -1. formula of the br ion will be
all the ions in an ionic compound carry charge. however, some of the ions like are positive. others ions like are negative. charge on the two types of ions balance each other. as a result, the compound is overall neutral.
1 × (+1) + 1 × (-1) = 0. the positive charge on one ion balances the negative charge on one ion. the two ions would pair up at a 1: 1 ratio.
the empirical formula for an ionic compound shows all the ions in the compound. positive ions are written in front of negative ions. is positive and is negative. the formula shall also show the simplest ratio between the ions. for the compound between li and br, a 1: 1 ratio will be the simplest. the "1" subscript in an empirical formula can be omitted. hence the formula: libr.