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Elis [28]
2 years ago
6

A flask containing 9.65 mL of liquid has a mass of 164.5g. The empty flask has a mass of 155.9 g. Calculate the density of the l

iquid in g/mL to the correct number of significant figures.
Chemistry
1 answer:
zlopas [31]2 years ago
5 0

155.9

Explanation:

A flask containing 9.65 mL of liquid has a mass of 164.5g. The empty flask has a mass of 155.9

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We are given with a compound, Lithium (Li) having a 4.8x 10 ^24 atoms. We are tasked to solve for it's corresponding grams.Note that 1 mol=6.022x10^{23} atoms and Li has 6.94 g/mol, hence,g Li= 4.8x 10 ^24 atoms x 1 mol/6.022x10^{23} atoms x  6.94 g Li/1mol Li= 
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What is a vacuole and which type of cell is it biggest in?*
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The third one or C

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4.How many atoms of silver are in 100 grams of silver?
zvonat [6]

Answer:

5.58x1023Agatoms 5.58 x 10 23 A g a t o m s

Explanation:

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4 0
3 years ago
The standard cell potential (E°cell) for the reaction below is +0.63 V. The cell potential for this reaction is __________V when
Elodia [21]

<u>Answer:</u> The cell potential of the above reaction is 0.52 V

<u>Explanation:</u>

The given chemical equation follows:

Pb^{2+}(aq.)+Zn(s)\rightarrow Zn^{2+}(aq.)+Pb(s)

<u>Oxidation half reaction:</u>  Zn(s)\rightarrow Zn^{2+}(aq.)+2e^-

<u>Reduction half reaction:</u>  Pb^{2+}(aq.)+2e^-\rightarrow Pb(s)

To calculate the EMF of the cell, we use the Nernst equation, which is:

E_{cell}=E^o_{cell}-\frac{0.059}{n}\log \frac{[Zn^{2+}]}{[Pb^{2+}]}

where,

E_{cell} = electrode potential of the cell = ? V

E^o_{cell} = standard electrode potential of the cell = 0.63 V

n = number of electrons exchanged = 2

[Zn^{2+}]=1.0M

[Pb^{2+}]=2.0\times 10^{-4}M

Putting values in above equation, we get:

E_{cell}=0.63-\frac{0.059}{2}\times \log(\frac{1.0}{2.0\times 10^{-4}})\\\\E_{cell}=0.52V

Hence, the cell potential of the above reaction is 0.52 V

7 0
3 years ago
How does density vary with temperature?
nexus9112 [7]
Things expand when heated. therefore the molecules are farther apartand the matierial is less dense. Things expand because their molecules are vibrating faster and are taking up more space

3 0
3 years ago
Read 2 more answers
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