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andrew11 [14]
2 years ago
5

Please help! USATestprep K12

Chemistry
2 answers:
NeX [460]2 years ago
8 0

Answer:

its none above

Explanation:

food webs have arrows that show the flow of energy from one orhganism to the next

bar graphs have bars and numbers and diagrams have words and pictures so it D

ycow [4]2 years ago
6 0

Answer: C

Explanation:

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What is the mole fraction of O2O2 in a mixture of 15.1 gg of O2O2, 8.19 gg of N2N2, and 2.46 gg of H2H2
SVETLANKA909090 [29]

Answer:

Mole fraction O₂=  0.43

Explanation:

Mole fraction is the moles of gas/ total moles.

Let's determine the moles of each:

Moles O₂ → 15.1 g / 16 g/mol = 0.94

Moles N₂  →  8.19 g / 14 g/mol = 0.013

Moles H₂  → 2.46 / 2 g/mol = 1.23

Total moles = 2.183

Mole fraction O₂= 0.94 / 2.183 → 0.43

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3 years ago
Which element does this Bohr model represent? (look at a periodic table if needed)
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Circulating round the nucleus are the electrons in various orbits of different energy levels. Electrons are negatively charged and represented by the symbol 'e'. In the given image the number of protons are -6. Hence the element in question is Carbon as Carbon has the atomic number 6.
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2 years ago
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some components of ink are minimally attracted to the stationary phase and very soluble in the solvent. where are these componen
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