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zhenek [66]
3 years ago
6

3 and

Chemistry
1 answer:
kenny6666 [7]3 years ago
3 0

Answer:

Hey I dont know it but good luck!! :)

Explanation:

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If you were asked to convert 25 cg to the unit hg, which of the following would be the first fraction used in the conversion? on
zhannawk [14.2K]
We are asked to convert 25 cg to units of hg.

1 cg = 1 centigram = 10⁻² g
1 hg = 1 hectogram = 10² g

The options given are:

a) 1 hg/ 10² g
b) 10² cg/ 1 hg
c) 10² hg/ 1 cg
d) 10⁻² g/ 1 cg

To convert 25 cg to 1 hg, we could convert the 25 cg to grams first, then grams to hg.

25 cg · 10⁻² g/ 1cg = 0.25 g

Here we have converted our number from cg to grams. We can use another conversion of grams to hg to complete the conversion.

0.25 g · 1 hg/ 10² g = 0.0025 hg

Therefore, the first conversion we used was d) 10⁻² g/ 1 cg.
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3 years ago
How is a line spectra created from a hot gas? a. photons are emitted when the amount of radioactive material in the gas decrease
fiasKO [112]

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c when electrons drop down from a high energy level they emit a photon.

Explanation:

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1 year ago
Measure out 2.87 moles of sodium chloride (Nacl) into a clean dry cup. ​
Anettt [7]

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Explanation: mass = amount of substance × molar mass

M((NaCl) = 22.99 +35.45

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What is the number of moles in 3.0 X 10^24 atoms of Carbon
evablogger [386]

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