How can the respiratory system become damaged?

Chemistry

2 answers:

Talja [164]3 years ago

5 0

Answer:

Botched surgery, inhaling harmful toxins and smoking.

Explanation:

Smoking is a death wish.

Ad libitum [116K]3 years ago

4 0

Respiratory failure is a serious condition that develops when the lungs can't get enough oxygen into the blood. Buildup of carbon dioxide can also damage the tissues and organs and further impair oxygenation of blood and, as a result, slow oxygen delivery to the tissues.

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Atoms of which element have the most valence electrons? A. Nitrogen (N) B. Sodium (Na) C. Oxygen (O) D. Calcium (Ca)

evablogger [386]

C.oxygen
It has 6 valence electrons

6 0

3 years ago

How many molecules of Ca are found in a sample with 0.2 mols?

DochEvi [55]

Answer:

$\boxed{1.2 \times 10^{23}\text{ atoms}}$

Explanation:

6.023 × 10²³ atoms of Ca are in 1 mol of Ca

$\text{No. of atoms} = \text{0.2 mol} \times \dfrac{6.023 \times 10^{23}\text{atoms }}{\text{1 mol }} = \mathbf{1.2 \times 10^{23}} \textbf{ atoms}}\\\\\text{There are }\boxed{\mathbf{1.2 \times 10^{23}} \textbf{ atoms}} \text{ atoms in 0.20 mol of Ca}$

6 0

3 years ago

Which choice represents a pair of resonance structures? Note that lone pairs have been omitted for clarity. View Available Hint(

stepladder [879]

Answer:

A. O=C=O and O≡C−O

Explanation:

Resonance:

When the electron distribution on the molecule become uneven like one molecule have more electron compare to other.Resonance occurs due to overlap of the orbitals.When electron flow through pi system then resonance occurs.

So the option A is correct.

A. O=C=O and O≡C−O