1) (a) what happens to the volume of the lungs when they expand? (b) Explain why air is sucked into the lungs (need to explain about the gas pressure)

PLS HELP THXX A LOTT
the topic is related to gas presssure
thx soo much for helping

може ли да зареждате повече информация, моля

the answer is 0.42 is that is an option. this question provides no info

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