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3 years ago

URGENT!!!!!!!!

Chemistry

1 answer:

statuscvo [17]3 years ago

3 0

The density of the iron is 7.8 g/mL.

The density of an object is defined as mass per unit volume of the object i.e

<h3>Density = mass / volume </h3>

To solve the question given above, we'll begin by calculating the volume of the iron. This can be obtained as follow:

Volume of water = 23.80 mL

Volume of water + Iron = 24.59 mL

<h3>Volume of iron =? </h3>

Volume of iron = (Volume of water + Iron) – (Volume of water)

Volume of iron = 24.59 – 23.80

<h3>Volume of iron = 0.79 mL </h3>

Finally, we shall determine the density of the iron. This can be obtained as follow:

Volume of iron = 0.79 mL

Mass of iron = 6.2 g

<h3>Density of iron =? </h3>

Density = mass / volume

Density = 6.2 / 0.79

<h3>Density of iron = 7.8 g/mL </h3>

Therefore, the density of the iron is 7.8 g/mL

Learn more: brainly.com/question/24611641

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What is the outdoor temperature where you are right now?.

rusak2 [61]

The outdoor temperature, also known as the ambient temperature, is a measure of the amount of heat in the environment and this depends on the kind of environment.

<h3>Temperature</h3>

The outdoor temperature around here is about 33 $^oC$ .

The temperature in the tropical area, where this area belongs, varies between 27 to 35 $^oC$ with an annual average of about 28 $^oC$ .

In order words, tropical regions are generally warm, unlike temperate regions.

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3 years ago

A sample of nitrogen gas, stored in a 2.96-L container at 32.0°C, exerts a pressure of 4.27 atm. Calculate the number of moles o

inysia [295]

<u>Answer:</u> The number of moles of nitrogen gas is 0.505 moles.

<u>Explanation:</u>

To calculate the number of moles of nitrogen gas, we use ideal gas equation, which is:

$PV=nRT$

where,

P = pressure of the gas = 4.27 atm

V = Volume of the gas = 2.96 L

T = Temperature of the gas = $32.0^oC=[32.0+273]K=305K$

R = Gas constant = $0.0821\text{ L. atm }mol^{-1}K^{-1}$

n = number of moles of gas = ?

Putting values in above equation, we get:

$4.27atm\times 2.96L=n\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 305K\\n=0.505mol$

Hence, the number of moles of nitrogen gas is 0.505 moles.

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4 years ago

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3 years ago

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