Answer:
Explanation:
The following precautions should be followed for a safe and efficient laboratory environment:
The TLC plate should be laid on a paper towel, to ease picking it from the bench top.
The used TLC spotters and the used TLC plates in the appropriate waste containers provided for this purpose should be placed in the blood.
Spills should be cleaned up and contaminated surfaces should be washed with water.
The pipette and/or glassware should be rinsed again with the distilled water, in case there is the slightest doubt about the contamination.
Everything used should be washed with distilled water, including the pipettes.
7. true
8. false
9.being able to live in and out of water (i cannot think of another one, sorry)
10. genes (again, i do not know the other one)
11. not sure
12. not sure
i am so sorry this is all i could give you. other people please tell them the other answers
Answer: ₉₈²⁵³Cf
253 is a superscript to the left of the symbol, Cf, which represents the mass number, and 98 is a subscript to the left of the same symbol, which represents the atomic number.
Explanation:
1) The alpha decay equation shows that the isotope Fm - 257, whose nucleus has 100 protons and 157 neutrons, emitted an alpha particle (a nucleus with 2 protons and 2 neutrons).
2) Therefore:
i) the mass number decreased in 4, from 257 to 257 - 4 = 253.
2) the atomic number decreased in 2, from 100 to 100 - 2 = 98.
3) Hence the formed atom has atomic number 98, which is californium, Cf, and the isotope is californium - 253.
4) The item that completes the given alpha decay reaction is:
₉₈²⁵³ Cf.
5) The complete alfpha decay reaction is:
₁₀₀²⁵⁷ Fm → ₉₈²⁵³Cf + ₂⁴He
You can verify the mass balance:
257 = 253 + 4, and
100 = 98 + 2
Answer:
The correct answer is "-268.667°C".
Explanation:
Given:
Temperature,
= 4.483 K (below)
Now,
The formula of temperature conversion will be:
⇒ 
By putting the values, we get
⇒ 
⇒ 
Thus the above is the correct answer.
Answer:
The concentration is 
Explanation:
From the question we are told that
The absorbance is 
The length is 
Generally absorbance is mathematically represented as
where 
is the molar absorptivity of FeSCN2 with a value 
and 
is the equilibrium concentration of FeSCN2
So
substituting values
