Sealed 2500 flask is full to capacity with 0.36 g of a substance. determine density of the substance. guess if the substance is a gas liquid or solid.

0.000144gcm⁻³

Explanation:

Given parameters:

Volume of flask = 2500mL

Mass of substance = 0.36g

Solution:

Density is the mass per unit volume of a substance. The flask used to determine the density of the substance will have a volume of 2500mL if equal amount of water is added to it.

Now, we must convert the given volume to that which would be more convenient to work with.

Density can be expressed as gcm⁻³ or kgm⁻³.

We have to convert the given volume to cubic centimeters.

           1mL = 1cm³

The volume of the flask in cubic centimeters is 2500cm³.

Density = =  

Density of the substance = 0.000144gcm⁻³

The substance is probably a gas. The density of water is 1gcm⁻³. Any value far below this should be a gas. Our answer is a very low density value.

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally