Chemistry, 16.01.2020 02:31, dereklilgoat

Which of the following methods is most appropriate to use to determine the number of different colored components in a sample of black ink? distillation at atmospheric pressure (b) elemental analysis to determine the mass ratio of c: h: n: o column chromatography using a nonpolar stationary phase and water as the mobile phase paper chromatography using different solvents with a range of polarities as the mobile phase

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answered: genyjoannerubiera

chromatography using different solvents with a range of polarities as the mobile phase

Explanation:

Chromatography is a separation method in chemistry which involves the separation of

the components of a mixture by allowing a solution of the mixture in a mobile phase (mixture of solvents of varying polarities) to pass through a stationary phase having varying affinities for the various components of the mixture. The components of the mixture are separated as they pass through the stationary phase.

Ink is best separated using different solvents with a range of polarities as mobile phase. This aids the separation of the components on the stationary phase.

answered: Guest

$\frac{239}{94}pu+\frac{1}{0}n ====> \frac{y}{z}x+\frac{134}{54}xe+3\frac{1}{0}$

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137 subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54 subtract 54 from both sides.

40 = z

answer

$\frac{103}{40}x=\frac{103}{40}zr$

answered: Guest

Mass is the amount of matter in an object. weight is the measurement of the pull of gravity on an object. say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165) now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon. however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant. in conclusion it is possible for your weight to change as your mass remains constant.

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