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Georgia [21]
3 years ago
8

How can people reduce respiratory Diseases & Accidents?

Chemistry
1 answer:
kirill [66]3 years ago
6 0

Respiratory diseases can be prevented. Avoiding exposure to tobacco smoke, home and workplace air pollutants, and respiratory infections can prevent the development of COPD. Smoking is the most common cause of chronic respiratory diseases like COPD. Smoking cessation is the most important part of treatment for smokers diagnosed with chronic respiratory disease. Indoor and outdoor air pollutants cam also cause respiratory problems. Air pollution can irritate, inflame, or destroy lung tissue. Washing hands regularly with soap and water can prevent respiratory infections. It is estimated that hands spread 80 percent of common infectious respiratory diseases like colds and flu. Early detection of respiratory diseases might change disease course and progress. A simple test, called spirometry can be used to measure pulmonary—or lung—function and detect COPD in anyone with breathing problems.

Hope this helps!


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A scientist measures the standard enthalpy change for the following reaction to be -17.2 kJ : Ca(OH)2(aq) 2 HCl(aq)CaCl2(s)
elixir [45]

Answer: \Delta H^{0}=-173.72 kJ/mol

Explanation: <u>Enthalpy</u> <u>Change</u> is the amount of energy in a reaction - absorption or release - at a constant pressure. So, <u>Standard</u> <u>Enthalpy</u> <u>of</u> <u>Formation</u> is how much energy is necessary to form a substance.

The standard enthalpy of formation of HCl is calculated as:

\Delta ^{0}=\Sigma H_{products}-\Sigma H_{reactants}

Ca(OH)_{2}_{(aq)}+2HCl_{(aq)} → CaCl_{2}_{(s)}+2H_{2}O_{(l)}

Standard Enthalpy of formation for the other compounds are:

Calcium Hydroxide: \Delta H^{0}= -1002.82 kJ/mol

Calcium chloride: \Delta H^{0}= -795.8 kJ/mol

Water: \Delta H^{0}= -285.83 kJ/mol

Enthalpy is given per mol, which means we have to multiply by the mols in the balanced equation.

Calculating:

-17.2=[-795.8+2(285.85)]-[-1002.82+2\Delta H]

-17.2=-1367.46+1002.82-2\Delta H

2\Delta H=17.2-364.64

\Delta H=-173.72

So, the standard enthalpy of formation of HCl is -173.72 kJ/mol

8 0
3 years ago
A compound is found to contain 73.23% xenon name 26.77% oxygen by mass. What is the empirical formula for this compound ?
Luba_88 [7]

The empirical formula is XeO₃.

<u>Explanation:</u>

Assume 100 g of the compound is present. This changes the percents to grams:

Given mass in g:

Xenon = 73.23 g

Oxygen = 26.77 g

We have to convert it to moles.

Xe = 73.23/   131.293 = 0.56 moles

O = 26.77/ 16 = 1.67 moles

Divide by the lowest value, seeking the smallest whole-number ratio:

Xe = 0.56/ 0.56 = 1

O = 1.67/ 0.56 = 2.9 ≈3

So the empirical formula is XeO₃.

6 0
3 years ago
_H2SO4 + __ B(OH)3 = _ B2(SO4)3 + __ H2O
Nana76 [90]

Answer:

3H2SO4 + 2B(OH)3 -> B2(SO4)3 + 6H2O

Explanation:

3 0
3 years ago
At what temperature does ice melt at 101kPa?
Snezhnost [94]

Answer:

Explanation: I also have a question if anyone can help in chem please

6 0
2 years ago
Which of the following reactions represents a redox reaction?
malfutka [58]

Answer:

B

Explanation:

sliver is being reduced (Ag+ + e‐ ----> Ag) while,

magnesium is being oxidized (Mg -----> Mg2+ + 2e‐)

4 0
2 years ago
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