If you stirred some sugar in water the sugar would disappear but the water would taste sweet. this is because change occurred. a.a physicalb. a chemicalc. both a physical and a chemicald. neither a physical nor a chemical

A. A physical change

because for it to be a chemical change, something new would need to be produced as a result of the dissolution. By the way, this doesn’t happen. All you get after dissolving sugar in water is a ‘sugary’ solution, no more and no less. The identity of the constituents remains unchanged. I hope this helps!

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

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.