3 years ago

What was the purpose of the periodic table?

Chemistry

1 answer:

andre [41]3 years ago

4 0

Answer:

Explanation:

The purpose of the periodic table was to organize elements as they were discovered into periods and groups, according to their properties. It was not just a naming of elements, as a list.

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12.A piece of magnesium is in the shape of a cylinder with a height of 5.62 cm

yaroslaw [1]

Answer:

Density, d = 1.779 g/cm³

Explanation:

The density of a material is given by its mass per unit volume.

Here, height of a piece of magnesium cylinder, h = 5.62 cm

Its diameter, d = 1.34 cm

Radius = 0.67 cm

Volume of he cylinder,

$V=\pi r^2 h\\\\\text{Putting the value of r and h, we get :}\\\\V=(\pi \times (0.67)^2\times 5.62)\ cm^3$

$d=\dfrac{m}{V}\\\\d=\dfrac{14.1\ g}{(\pi \times (0.67)^2\times 5.62)\ cm^3}\\\\d=1.779\ g/cm^3$

So, the density of the sample is 1.779 g/cm³.

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2 years ago

What is the molarity of a solution with 130g of CoCl2 in 1/2 liter? (can you show the steps please)

Elden [556K]

Answer:

Explanation:

M=mol/L

1. Find moles of CoCl2

mass of substance/molar mass = 130/129.833 = 1.001 mol

3. Substitute in molarity equation

M=(1.001/0.5)

M= around 2M

7 0

2 years ago

Can someone provide a answer with explanation for this question? Thanks!

zhuklara [117]

Answer:

Explanation:

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1 year ago

Two parent reproduction involves cell division that includes ___________? *

Anettt [7]

Answer:

Mitosis

Explanation:

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2 years ago

Which scientist bombarded gold sheets with alpha particles to look at the atom?

Alekssandra [29.7K]

the correct scientist is rutherford

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3 years ago