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cestrela7 [59]
3 years ago
6

When you breathe the first step is that your lungs expand. why is this step needed

Chemistry
1 answer:
Alinara [238K]3 years ago
5 0

Answer:

When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.

Explanation:

^^^

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What mass of nitrous oxide gas (N2O) is contained in 40.0 L balloon at a pressure of 130.0 kPa and a temperature of 25 °C?
tamaranim1 [39]

The mass of the N₂O in the given question is 92.4g.

<h3>What is the moles of N2O in the given conditions?</h3>

STEP1- Apply the ideal gas equation

            PV=nRT

STEP2- Put the given values in the equation

            P=130kPa,     T=298K,     V=40L  R=8.31

STEP3- Solve the equation

           N=PV/RT,

           N=130×40/8.31×298

             N=2.1moles

             N=mass/molecular mass

             mass=2.1×44

            mass = 92.4g

Hence, the mass of N₂O is 92.4g.

learn more about ideal gas.

brainly.com/question/25290815

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2 years ago
Which type of bond is present in hydrogen sulfide (H2S)? The table of electronegativities is given
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Bonds formed between atoms can be classified as ionic and covalent

Ionic bonds are formed between atoms that have a high difference in the electronegativity values.

In contrast, bonds formed between atoms that have a difference in electronegativity lower than the ionic counterparts are polar covalent bonds.  If the atoms have very similar electronegativities, they form non-polar covalent bonds.

In H2S, the S atom is bonded to 2 H atoms. The electronegativity of H = 2.2 and S= 2.56. Since the difference is not high the bond formed will be covalent (polar covalent).

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75.0 degrees Celsius = 75.0 + 273 = 348 K.

Assuming pressure is held constant,

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