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oksano4ka [1.4K]
3 years ago
13

Which compound can be used to preserve biological specimens?

Chemistry
2 answers:
Ksju [112]3 years ago
7 0
<span>Biological specimens have been preserved in alcohol and formalin for many years.This could damage the specimen and change the colour of the fluid.Engineered fluids are now used as a substitute for formalin as it is a more sustainable medium..Novec fluids which are low in toxicity are also used.</span>
jok3333 [9.3K]3 years ago
3 0

Answer:

Answer (A) on Edge.; Formalin

Explanation:

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Identify each type of titration curve. note that the analyte is stated first, followed by the titrant.
Ghella [55]
Each of the type of titration curve are as follows: Strong acid-strong base= starts small than increases<span>Weak acid-strong base= low then high (small difference) Weak base- strong acid= high to low. Have in mind that titraton curves generally contain the volume of the titrant as the independent variable and the ph of the solution as the dependent variable. </span>
8 0
3 years ago
What factor affects the solubility of all solutes, whether solid, liquid, and gaseous?
ICE Princess25 [194]

Answer:

temperature

Explanation:

Temperature is the only factor that affects the solubility of all solutes whether they are solid, liquid or gaseous.

Solubility of solutes is temperature dependent.

When one substance dissolves in another, they are said to be soluble in it.

Pressure as a factor only affects the dissolution of gases.

Volume and number of moles do not affect solubility

3 0
3 years ago
When molten magma cools ________ under the surface, it forms _________ igneous rocks.
avanturin [10]
A: rapidly, extrusive
5 0
2 years ago
Read 2 more answers
2.5 million atoms of a particular element have a mass of 8.33 x 10-16 grams. what is this element
jeyben [28]
Find the mass of one atom by:

8.33 x 10^{-16} / 2.5 x 10^{6}  = 3.32 x 10^{-22} g

Convert it into amu.
1 g = 6.022 x 10^{23} amu
so, 3.32 x 10^{-22}  x  6.022 x 10^{23}  =  200.6 amu

Now look at the periodic table and search for 200.6 amu element.
The element is Mercury (Hg)

5 0
3 years ago
A sample of nitrogen gas, stored in a 2.96-L container at 32.0°C, exerts a pressure of 4.27 atm. Calculate the number of moles o
inysia [295]

<u>Answer:</u> The number of moles of nitrogen gas is 0.505 moles.

<u>Explanation:</u>

To calculate the number of moles of nitrogen gas, we use ideal gas equation, which is:

PV=nRT

where,

P = pressure of the gas = 4.27 atm

V = Volume of the gas = 2.96 L

T = Temperature of the gas = 32.0^oC=[32.0+273]K=305K

R = Gas constant = 0.0821\text{ L. atm }mol^{-1}K^{-1}

n = number of moles of gas = ?

Putting values in above equation, we get:

4.27atm\times 2.96L=n\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 305K\\n=0.505mol

Hence, the number of moles of nitrogen gas is 0.505 moles.

6 0
4 years ago
Read 2 more answers
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