Answer:
The atomic mass of Zinc is 65.30 Da
Explanation:
<u>Step 1: </u>Data given
3 major isotopes
⇒ Zinc-64
atomic mass = 63.929 Da
Peak intensity = 100
⇒ Zinc-66
atomic mass = 65.9260 Da
Peak intensity = 57.4
⇒ Zinc- 68
atomic mass = 67.9248 Da
Peak intensity = 38.6
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<u>Step 2:</u> Calculate the natural abundance
∑peak intensity = 100 + 57.4 + 38.6 = 196
Zinc-64 : 100/196 = 0.5102 ⇒ 51.02 %
Zinc-66 : 57.4/196 = 0.2929 ⇒ 29.29 %
Zinc-68 : 38.6/196 = 0.1969 ⇒ 19.69 %
<u>Step 3:</u> Calculate the atomic mass if Zinc
63.9291 * 0.5102 + 65.9260*0.2929 + 67.9248*0.1969 = 65.3007 Da
The atomic mass of Zinc is 65.30 Da
An organ system is contained inside an organism. Going from largest to smallest it goes organism->organ system-> organ-> tissue-> cell-> atom
Answer:
Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms. ... Humans play a major role in the carbon cycle through activities such as the burning of fossil fuels or land development
Answer:
Explanation:
One of the properties of a liquid is that, <u>it's particles move freely (not tightly packed)</u> hence the reason for <u>it's free flowing (no definite shape)</u> when shaken in a container, unlike a solid whose <u>particles are tightly packed with restricted/no movement</u> and hence the reason for it's compactness and it's definite shape.
When a plastic solid (whose particle is tightly packed and have a restricted movement/no movement) is placed near a heat source, <u>it's particles gains energy in the process and starts to move (though slightly free) and become less tightly packed</u> hence the reason it is observed that plastic solids near a heat source melts.
From the above, it can be deduced that a liquid and a plastic solid near a heat source <u>have there particles move freely (and not tightly packed) hence making the two substances flow freely with no definite shape.</u>