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3 years ago

8

Is nitrogen an atom or an ion, why?

1 answer:

beks73 [17]3 years ago

3 0

Answer:

An atom

Explanation:

Because an ion is smaller than an atom and if we're talking about ions, iron would be called a Nitride ion or N3-ion, so ion come from atoms and saying that nitrogen is an atom.

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What atom has 8 protons and 10 electrons?

Lorico [155]

Answer:

In your case, you have 8 protons and 10 electrons. This means that the atom will carry a total 2 xx (1-) = 2- net charge. Therefore, you are dealing with an anion that carries a 2- net charge, i.e. it has two more electrons than it does protons.

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3 years ago

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What does applied chemistry have to do with making ice cream?

Lapatulllka [165]

Well you have to mix chemicals which caused a chemical reaction. When you mix salt and ice the freezing point of liquid changes. the ice gets colder

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3 years ago

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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

The weight of a substance is defined as its mass divided by its volume. Please select the best answer from the choices provided

Alexus [3.1K]

Answer: The given statement is false.

Explanation:

Weight :It is defined as the measure of force exerted upon the object by the gravity. It is measured in Newtons.

$W=mg$ , where W= Weight , m = mass of the object , g = acceleration due to gravity = $9.8m/s^2$

Here the given statement is False, the correct statement will be:

The density of a substance is defined as its mass divided by its volume.

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What is the result of multiplying 2.55 x 10^10 m x 3.5 x 10^-7m using proper significant figures and scientific notation.

BartSMP [9]

3 I think I’m sure much love

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3 years ago