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3 years ago

How does knowing a great deal about the property of certain elements help us as humans?

2 answers:

7 0

Well because we can use those elements for are own personal use like combining them to make better things like iron is in lots of things. Without knowing alot about the elements we wouldnt know how to use them

vaieri [72.5K]3 years ago

5 0

It is very useful for humans to know a great deal about the property of certain elements. This is because knowing such information can allow us to better employ the elements to benefit our lives. This is why the role of scientists in our society is so vital. Scientists not only discover the properties of the elements, but they also come up with ways in which we can use them safely, sustainably and efficiently.

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A certain gas is present in a 15.0 LL cylinder at 2.0 atmatm pressure. If the pressure is increased to 4.0 atmatm the volume of

Helga [31]

Explanation:

According to Boyle's law, pressure of a gas is inversely proportional to its volume at constant temperature and moles.

Mathematically, P = $\frac{k}{V}$

where, k = proportionality constant

Also, formula for initial pressure and volume is as follows.

$P_{i} = \frac{k_{i}}{V_{i}}$

or, $k_{i} = P_{i} \times V_{i}$

= $2 atm \times 15 L$

= 30 atm L

Now, we will calculate the value of $k_{f}$ as follows.

$k_{f} = P_{f} \times V_{f}$

= $4 atm \times 7.5 L$

= 30 atm L

Hence, as $k_{i} = k_{f}$ this means that it signifies that gas obeys boyle's law.

6 0

4 years ago

A block of metal has a volume of 14.0in3 and weighs 5.26lb .

natulia [17]

Mass of block, m = 5.26 lb
1 lb = 453.592 g
5.26 lb = 2385.896 g
V = 14 in3
1 in = 2.5 cm
1 in3 = 15.625 cm3
14 in3 = 218.75 cm3

Density = mass/volume
= 2358.896 / 218.75
= 10.783 g/cm3

6 0

3 years ago

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The velocity of a wave is the product of the frequency and the

andreev551 [17]

I would say A wavelength

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3 years ago

He partial lewis structure that follows is for a hydrocarbon molecule. in the full lewis structure, each carbon atom satisfies t

Bezzdna [24]

Answer:

Four (4) hydrogen atoms

Explanation:

C=C-C(triple bond)C

only four hydrogen atoms can bond with the vacant space

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3 years ago

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What effect does gravity have on a slinky

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If you consider the motion of the slinky as just one object, you can look at it's center of mass. From the whole slinky point of view, there is only one force on the slinky - the gravitational force. This means that it falls and accelerates downward with an acceleration of -9.8 m/s2 just like all free-falling objects. Plze mark brainiest

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3 years ago