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astra-53 [7]
3 years ago
6

2. Why are stain used when preparing observing cells under the

Chemistry
2 answers:
ella [17]3 years ago
8 0

Answer:

to see the cells clearly

erica [24]3 years ago
4 0

Answer:

So u dont mess it up

Explanation:

Suu whoop real right blood gang on dead homies

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What is the mass of 8.12 × 10^23 molecules of CO2 gas? (Atomic mass of carbon = 12.011 u; oxygen = 15.999 u.)
amid [387]

Answer:

m=59.3gCO_2

Explanation:

Hello,

In this case, the first step is to compute the molar mass of carbon dioxide as shown below, considering it has one carbon atom and two oxygen atoms:

M=12.011g/mol+2*15.999g/mol\\\\M=44.009g/mol

It is important to notice it is the mass in one mole of such compound. Afterwards, we need to use the Avogadro's number to compute the how many moles are in the given molecules of carbon dioxide as shown below:

mol=8.12x10^{23}molec*\frac{1mol}{6.022x10^{23}molec} =1.35mol

Finally, the mass by using the molar mass:

m=1.35mol*\frac{44.009g}{1mol} \\\\m=59.3gCO_2

Best regards.

4 0
2 years ago
Help meeeeeeee??????????​
kolbaska11 [484]

Answer:

njjii

Explanation:

uujhhhjhhhthnjkk

5 0
2 years ago
A solid substance formed when two aqueous solutions are mixed is known as a
lys-0071 [83]

Answer:

b. precipitate is your answer

3 0
2 years ago
Read 2 more answers
What is the answer to...
adoni [48]

Answer: short answer short 0.65 / 5.37

15% NaOH by mass is 15g of NaOH in (100-15)g of solution.

No. Of moles of NaOH in solution = 0.65

No of moles of Water in solution = 4.72

Mole Fraction =  

(

(Moles of Solvent)

(Moles Of Solute)+(Moles of Solvent)

)

OR

(

(Moles of Solvent)

Total Number Of Moles

)

= 0.65 / 5.37

= 0.121

Explanation:

Hope this helped

8 0
3 years ago
Why is reaching activation energy necessary
padilas [110]
Activation of energy is the foundation of chemical being react in a solution. If activation energy is not reached then no reaction would happen.
6 0
3 years ago
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