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PSYCHO15rus [73]
3 years ago
11

A compound contains 29.27% carbon, 51.22% nitrogen, and 19.50% oxygen. What is the molecular formula if the molar mass is 570.5

grams?
Chemistry
1 answer:
sveta [45]3 years ago
3 0

Answer:

its either A or B most likley A if im wrong then im sorry.

Explanation:

have a wonderfull day

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The human body has four types of tissues, and the eye contains all four. Which statement correctly pairs the part of the eye
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Answer:

The correct answer is D) Nerve tissue is found in the retina, the rods and cones at the back of the eye.

Explanation:

The rods and cones are photoreceptors (that is nerve cells within the eyes that can sense light) which is situated in the retina.

These photoreceptors also sense colours and send these signals into the optic nerve for transmission to the brain.

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6 0
3 years ago
All of the alkali earth metals, Group 2, have two valence electrons. Which of these would represent the oxidation number of the
chubhunter [2.5K]
Since Group 2 alkali earth metals have 2 valence electrons, they tend to lose those 2 when forming ionic bonds. And the Loss of Electrons = Oxidation (L.E.O. for short). Therefore this group, including Mg and Ca, have an oxidation of [+2].
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5 0
3 years ago
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The thallium Subscript 81 Superscript 208 Baseline Tl nucleus is radioactive, with a half-life of 3.053 min. At a given instant,
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Answer: (E) 300 bq

Explanation:

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Radioactive decay process is a type of process in which a less stable nuclei decomposes to a stable nuclei by releasing some radiations or particles like alpha, beta particles or gamma-radiations. The radioactive decay follows first order kinetics.

Half life is represented by t_{\frac{1}{2}

Half life of Thallium-208 = 3.053 min

Thus after 9 minutes , three half lives will be passed, after ist half life, the activity would be reduced to half of original i.e. \frac{2400}{2}=1200, after second  half life, the activity would be reduced to half of 1200 i.e. \frac{1200}{2}=600,  and after third half life, the activity would be reduced to half of 600 i.e. \frac{600}{2}=300,

Thus the activity 9 minutes later is 300 bq.

7 0
3 years ago
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kari74 [83]

Answer:

electron configuration

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The arrangement of electrons in the atomic orbitals of an atom is called the electron configuration. Electron configurations can be determined using a periodic table.

6 0
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jonny [76]
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