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3 years ago

How will you describe the pathway of oxygen in the breathing system?

1 answer:

6 0

Air enters through the nose or mouth (which join to form the nasopharyngeal cavity). The air travels through the trachea which and the trachea splits into two bronchi. The air travels through the bronchi which split into smaller and smaller bronchioles. The tiny bronchioles and the air ends up in the miniscule alveoli, where the oxygen in the air diffuse into the bloodstream. Carbon dioxide diffuse from the bloodstream into the alveoli and the unwanted gas travels in reverse back to the nose and mouth, where it is breathed out.

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When polonium-210 emits an alpha particle, the child isotope has an atomic mass of

Sergeeva-Olga [200]

Answer: The child isotope has an atomic mass of 206.

Explanation:

Alpha decay : When a larger nuclei decays into smaller nuclei by releasing alpha particle. In this process, the mass number and atomic number is reduced by 4 and 2 units respectively.

General representation of an element is given as: $_Z^A\textrm{X}$

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

General representation of alpha decay :

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}Y+_2^4\alpha$

$_{84}^{210}\textrm{Po}\rightarrow_{82}^{206}\textrm{Pb}+_2^4\textrm{He}$

8 0

3 years ago

Read 2 more answers

Please I need help with this homework

lesya [120]

1. Sediment are like sand, pebbles, cobble, boulders, other type of vegetation like tree trunks. When sediment slides over the river bed of a solid rock it will erode some of the rock

6 0

3 years ago

Protons are in the nucleus of the atom and have a positive charge. True or False?

gladu [14]

True. They are positive charged! Hope this helps

3 0

3 years ago

When 2 moles of Na(s) react with H2O(l) to form NaOH(aq) and H2(g) according to the following equation, 369 kJ of energy are evo

enot [183]

Answer:

Exothermic

q = -8.03 kJ/g

Explanation:

When 2 moles of Na(s) react with H₂O(l) to form NaOH(aq) and H₂(g) according to the following equation, 369 kJ of energy are evolved.

The thermochemical equation is:

2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g) ΔH = -369 kJ

Since the energy is evolved, the reaction is exothermic, which is why the enthalpy of the reaction (ΔH) is negative.

The heat released (q) per gram of Na(s) is (molar mass 22.98 g/mol):

$\frac{-369kJ}{2molNa} .\frac{1molNa}{22.98gNa} =-8.03kJ/g$

4 0

3 years ago

How many atoms of Mg are present in 97.22 grams of Mg?

Hitman42 [59]

Answer:

b.......

Explanation:

b.....

5 0

4 years ago