Answer:
The answer to your question is one more neutron
Explanation:
Nitrogen-14 and Nitrogen-15 are isotopes, these molecules have the same number of protons but a different number of neutrons.
In the example given
Nitrogen-14 has 7 protons and 7 neutrons and,
Nitrogen-15 has 7 protons and 8 neutrons.
These molecules are considered the same element because they have the same physical and chemical properties.
Answer:
27.60 g urea
Explanation:
The <em>freezing-point depression</em> is expressed by the formula:
In this case,
- ΔT = 5.6 - (-0.9) = 6.5 °C
m is the molality of the urea solution in X (mol urea/kg of X)
First we<u> calculate the molality</u>:
- 6.5 °C = 7.78 °C kg·mol⁻¹ * m
Now we<u> calculate the moles of ure</u>a that were dissolved:
550 g X ⇒ 550 / 1000 = 0.550 kg X
- 0.84 m = mol Urea / 0.550 kg X
Finally we <u>calculate the mass of urea</u>, using its molecular weight:
- 0.46 mol * 60.06 g/mol = 27.60 g urea
The correct answer is this one: "the number of electrons that are involved in the bonding of the molecule." Lewis structures help us understand the number of electrons that are involved in the bonding of the molecule. It also helps us know the shape of the molecule, its reactivity and its interaction with other molecules.
Easy the partial pressure is the 0.9883 as the linguistic compound of the average element of the shell is the same as the boron
