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2 years ago

Please help it’s due really soon

Chemistry

1 answer:

shtirl [24]2 years ago

8 0

The type of chemical bond depends on the substances taking part in it. If the substances are metal and non-metal, then the bond between them is ionic. If two substances are metal, then the bond between them is metallic. If two substances are non-metal, then the bond is covalent.

So basically put this:

Metal + Nonmetal = Ionic

Metal + Metal = Metallic

Nonmetal + Nonmetal = Covalent

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Assume the alveolar radii are 0.05 and 0.07 mm towards the end of exhalation. Knowing that air flows from high to low pressures,

xeze [42]

Answer:

$0.286 mN/m^2$

Explanation:

Using Laplace's law of surface tension:

$P=\frac{2T}{r}$

where:

P = pressure

T = surface tension

r = radius

In the longer alveoli with radius of 0.07 mm = $0.07*10^{-2}m$ ; we have:

P = $\frac{2*25mN/m}{0.07*10^{-2}m}$

P = $0.714 mN/m^2$

In the smaller alveoli with radius 0.05 mm = $0.05 * 10^{-2} m$ ; we have:

P = $\frac{2*25mN/m}{0.05*10^-2m}$

P = $1.00 mN/m^2$

The pressure difference can now be calculate as follows:

Pressure difference = $(1.00 - 0.714)mN/m^2$

Pressure difference = $0.286 mN/m^2$

5 0

3 years ago

14. As the temperature of a gas in a closed container increasses, what is true of the particles in the substance? (2 points)

Ede4ka [16]

The rate of particle movement increases, also increases the pressure in the vessel

4 0

3 years ago

The electronegativity of an atom generally _______ going down columns and _______ going left to right across rows. An element li

blondinia [14]

Answer:

Explanation:

The electronegativity of an atom is a chemical property of that atom that describes the tendency of the atom in question to attract a lone pair of electrons towards itself.

Across the periods, that is going from left to right on the periodic table, it is expected that there is an increase in the electronegativity of elements. Hence, there are more electronegative elements on the right hand side of the periodic table. Thus, we say chlorine or fluorine is more electronegative than either sodium and magnesium.

While it is expected to increase across the period, electronegativity decreases down the group. Hence, we know that chlorine is more electronegative than bromine while fluorine is more electronegative than chlorine. In fact, fluorine is the most electronegative element as it is the first member of the most electronegative group of elements.

Fluorine and oxygen are expected to undergo a covalent bond formation. Both are electron deficient and thus completes their electron orbits by entering into covalent bonding with each other

8 0

3 years ago

10. A small helium tank claims to be able to fill 30 balloons to a volume of 3.15 L

Sindrei [870]

Taking into account the Boyle's law, 3.377 L of helium the tank will be able to produce at a pressure of 94.2 kPa.

The gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature, and moles.

Boyle's law is one of the gas laws that relates the volume and pressure of a certain quantity of gas kept at constant temperature.

This law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant. That is, if the pressure increases, the volume decreases; while if the pressure decreases, the volume increases.

Mathematically, Boyle's law states that the product of pressure and volume is constant:

P×V= k

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

P1× V1= P2×V2

In this case, you know:

P1= 101 kPa
V1= 3.15 L
P2= 94.2 kPa
V2= ?

Replacing in Boyle's law:

101 kPa× 3.15 L= 94.2 kPa× V2

Solving:

$V2=\frac{101 kPa x3.15 L}{94.2 kPa}$

In summary, 3.377 L of helium the tank will be able to produce at a pressure of 94.2 kPa.

Learn more:

brainly.com/question/4147359?referrer=searchResults

7 0

3 years ago

What is CO2 nomenclature

Yanka [14]

Are you looking for the definition or answer? Since nomenclature is just definition by name or giving a specific name; the overall answer should be Carbon Dioxide.

3 0

4 years ago