4. Take a beaker with some water and place a lighted candle in standing position in it. Now cover the candle with a test tube to cut off it air supply. For how long does the candle keep on burning? How much water rises up in the test tube? Why did it happen so? Explain with diagram. You can perform this experiment with utensils available at your home in case of non availability of the beaker and test tube.

here are some of the ways in which chemical and nuclear reactions differ.

explanation:

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