I think it’s d
If it’s wrong then I’m sorry
I think the correct answer from the choices listed above is option 3. The atomic mass of an element is defined as the weighted average mass of that element's naturally occurring isotopes. <span>The atomic mass of a single atom is simply its total mass and is typically expressed in atomic mass units or amu.</span>
Answer:
The protein has 4 subunits: 2 subunits of 90 kDa, 1 subunit of 160 kDa and 1 subunit of 60 kDa
Explanation:
In gel electrophoresis, the SDS agent produces denaturation of the protein and confers negative charge, so the protein subunits can migrate according to their masses. It produces dissociation of the protein in its subunits but it cannot disrupt disulphyde bridges (S-S) that can bond subunits together.
From the data, with SDS we observe 3 bands ⇒ 180 kDa + 160 kDa + 60 kDa
The addition of dithiotreitol (DTT), a reducing agent, produces the disruption of disulphyde bridges. From the data:
With DTT ⇒ 160 kDa + 90 kDa + 60 kDa
We observe that 160 kDa and 60 kDa subunits are conserved (they are the same as with SDS only), but 180 kDa subunit is missing and in its place appears a band of 90 kDa - a half 180 kDa.
So, the band at 180 kDa is composed by two subunits bonded by a disulphyde bridge.
Therefore, the composition of the protein is: <em>1 subunit of 160 kDa, 2 subunits of 90 kDa and 1 subunit of 60 kDa</em>.
Answer:
The smallest ballon is the ballon X
Explanation:
It is possible to answer this question by using Graham's law:
Where v is the speed of effusion and MW is molar weight of each compound.
This equation is showing that speed is inversely related to the square root of its molar mass. As carbon dioxide has a bigger MW than carbon monoxide, the speed of effusion of carbon dioxide is lower doing its ballon biggest than carbon monoxide ballon, thus: <em>The smallest ballon is the ballon X</em>
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I hope it helps!
Answer:
730×10 6 g
Explanation:
each one mole of NH4NO3 has 2 moles of nitrogen (2×14)
N NH4NO3
2×14 14+(4×1) +14+(3×16)
28 80
? 2.086 × 10 9
2.086× 10 9 ×28 ÷80 = 730 × 10 6 g of Nitrogen