What is the mass of 4.5 x 10^22 molecules of hydrogen peroxide H2O2 2.54 g

3.2 g

1.78 g

4.61 g

The answer is 2.54g

To find the mass we must first find the number of moles we use the Formula ;

N = n × L

where

N is the number of entities

n is the number of moles

L is the Avogadro's constant which is

6.023 × 10^23

n = N / L

N = 4.5 x 10^22 molecules

n = 4.5 x 10^22 / 6.023 × 10^23

n = 0.0747 moles

Molar mass = mass / number of moles

Molar mass of H2O2 = (2 × 1) + (16 × 2)

= 2 + 32

= 34g/mol

mass = molar mass × number of moles

= 34 × 0.0747

= 2.5398

= 2.54g

Hope this helps

c)red bank

explanation:

red bank is a borough in monmouth county, new jersey, incorporated in 1908 and located on the navesink river, the area's original transportation route to the ocean and other ports.

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa