10.

Chemistry

1 answer:

Dmitriy789 [7]3 years ago

8 0

Answer:

answer

1. Describe the properties of alkali metals. Based on their electronic arrangement, explain whether they exist alone in nature. 2. Describe an electron

Explanation:

sana maka tulong sa nangangailangan

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How many molecules in each sample? 64.7 g N2 83 g CCl4 19 g C6H12O6

lilavasa [31]

Answer:

1.39x10²⁴ molecules N₂

.25x10²³ molecules CCl₄

6.38x10²² molecules C₆H₁₂O₆

Explanation:

First we convert the given masses into moles, using the compounds' respective molar mass:

64.7 g N₂ ÷ 28 g/mol = 2.31 mol N₂

83 g CCl₄ ÷ 153.82 g/mol = 0.540 mol CCl₄

19 g C₆H₁₂O₆ ÷ 180 g/mol = 0.106 mol C₆H₁₂O₆

Then we multiply each amount by Avogadro's number, to calculate the number of molecules:

2.31 mol N₂ * 6.023x10²³ molecules/mol = 1.39x10²⁴ molecules

0.540 mol CCl₄ * 6.023x10²³ molecules/mol = 3.25x10²³ molecules

0.106 mol C₆H₁₂O₆ * 6.023x10²³ molecules/mol = 6.38x10²² molecules

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3 years ago

Why do elements in a group on the periodic table have similar chemical properties?

NARA [144]

Do elements in a group on the periodic table have similar chemical properties because their atoms have the same number of electrons

A. same number of outermost electrons

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4 years ago

What describes how computer programs convert design sketches into three dimensional images

weeeeeb [17]

Answer:

The programs take two-dimensional images and allow the user to manipulate cubes and prisms to create their design sketches.

Explanation:

Instead of working with squares and triangles, the programs allow the users to manipulate cubes and prisms to create their design sketches. Additionally, the programs can take two-dimensional pictures and convert them to possible three-dimensional images.

I got you bro :)

Sorry he took your points :(

- massmaster34

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3 years ago

What minerals and ores (in a mine) are pure substances mixtures and solutions?

klio [65]

Normally in a mine the ore thats extracteed is unpure and contains many impurities and so are usually compounds and so must be then processed to form pure elements
some elements can be extracted from a solution of its ions such as magnesium
hope that helps

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3 years ago

Calcium carbide reacts with water to produce acetylene gas according to the following equation: CaC2(s) + 2H2O(l)C2H2(g) + Ca(OH

mars1129 [50]

Answer : The number of moles of $CaC_2$ reacted was, 0.214 moles.