What mass of ni has as many atoms as there are n atoms in 63.0 g of no2?

Answer : The mass of Ni is, 80.346 g

Solution :

First we have to calculate the number of moles.

Now we have to calculate the number of atoms of

As 1 moles contains number of molecules

So, 1.369 moles contains number of molecules

One molecule has one nitrogen atom then number of molecules of will contain number of nitrogen atoms

As per question number of Ni atoms is equal to the number of nitrogen atoms

Number of Ni atoms= atoms

Number of moles =

Mass of Nickel =

Molecular mass of Nickel = 58.69 g/mol

Mass of nickel =

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.