One mass is expressed in which of these units group of...

Name: one mass is expressed in which of these units group of answer choices density stem cell activity color flexibility 64635
Uploaded: 2021-05-06T00:08:37-08:00
Duration: 1 min 17 s
Channel: Nicole Smina
Description: one mass is expressed in which of these units group of answer choices density stem cell activity color flexibility 64635

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Which of the these statements are qualitative? Which are quantitative? Explain your choice in each case. (a) The atomic mass of carbon is $12.011(12.011$ atomic mass units). (b) Pure aluminum is a silvery-white metal that is nonmagnetic, has a low density, and does not produce sparks when struck. (c) Sodium has a density of $0.968 \mathrm{~g} / \mathrm{mL}$. (d) In animals the sodium cation, $\mathrm{Na}^{+}$, is the main extracellular cation and is important for nerve function.

What type of quantity (for example, length, volume, density) do the following units indicate? (a) $\mathrm{mL},(\mathbf{b}) \mathrm{cm}^{2}$ ,$(\mathbf{c}) \mathrm{mm}^{3},(\mathbf{d}) \mathrm{mg} / \mathrm{L},(\mathbf{e}) \mathrm{ps},(\mathbf{f}) \mathrm{nm},(\mathrm{g}) \mathrm{K}$

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Which of the these statements are qualitative? Which are quantitative? Explain your choice in each case. (a) The atomic mass of carbon is $12.011$ amu (atomic mass units). (b) Pure aluminum is a silvery-white metal that is nonmagnetic, has a low density, and does not produce sparks when struck. (c) Sodium has a density of $0.968 \mathrm{~g} / \mathrm{mL}$. (d) In animals the sodium cation is the main extracellular cation and is important for nerve function.

Transcript

00:01 So we're going to determine whether these statements are qualitative or quantitative.

00:04 If they involve some kind of numerical measurement, quantitative, otherwise we can just observe without measuring, it's going to be qualitative.

00:11 Here we have atomic mass of carbon.

00:13 We specify a number that was measured.

00:16 So that is a quantitative value.

00:21 Here we have a list of things about aluminum.

00:24 You can observe all of these things, whether it's magnetic or not, you just put a magnet next to it...