3 years ago

Is dihydrogen monoxide a real substance? Do you think it should be banned?

1 answer:

5 0

Yes it’s a real substance and yes it should be banned because it kills people without warning.It has no taste,smell,and you can’t see it.

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The cylinder of aluminum in class was approximately 13mm in circumference and 42mm in length. What would be it's approximate mas

Roman55 [17]

Answer:

Mass, m = 1.51 grams

Explanation:

It is given that,

The circumference of Aluminium cylinder, C = 13 mm = 1.3 cm

Length of the cylinder, h = 4.2 cm

We know that the density of the Aluminium is 2.7 g/cm³

Circumference, C = 2πr

$r=\dfrac{C}{2\pi}\\\\r=\dfrac{1.3}{2\pi}\\\\r=0.206\ cm$

Density is equal to mass per unit volume.

$d=\dfrac{m}{V}$

m is mass of the cylinder

V is the volume of the cylinder

$V=\pi r^2h\\\\V=\dfrac{22}{7}\times0.206^2\times 4.2\\\\V=0.5601\ cm^3$

So,

$m=d\times V\\\\m=2.7\times 0.5601\\\\m=1.51\ g$

So, the mass of the cylinder is 1.51 grams.

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3 years ago

What is meaning of trash

salantis [7]

Answer:

waste or discarded material

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True or False: Cohesion is the attraction between particles of the same<br> substance

RideAnS [48]

Answer: True

Explanation:

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3 years ago

22.0 g of a metal absorbs 713 J when it is heated from 28.3 °C to 72.8°C. What is

frosja888 [35]

Explanation:

the answer and explanation is in the picture

hope this helps

please like and Mark as brainliest

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3 years ago

How many moles of AgCl2 are in 5.78x1024 molecules of AgCl2?

Zolol [24]

Answer:

9.6 mol AgCl2

Explanation:

You have to use Avogadro's number: 6.023 x 10^23

5.78 x 10^24 molecules (1 mol AgCl2/ 6.023 x 10^23 molecules) =9.6 mol AgCl2

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3 years ago