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VLD [36.1K]
3 years ago
12

What are the basic building blocks of matter?

Chemistry
2 answers:
Naddik [55]3 years ago
8 0
Elements because elements make up atoms which make up everything
Yanka [14]3 years ago
8 0
Elements because elements make up atoms which make up everything

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The images represent three samples of identical gas molecules at the same internal pressure. Which sample would you expect to ha
Nuetrik [128]

its b i jus took the quiz

3 0
3 years ago
What is the ground-state electron configuration of the fluoride ion F−? Express your answer in condensed form, in order of incre
hoa [83]

Answer:

[He]2p6

Explanation:

Fluorine has an atomoc number of 9 which means 9 electrons with the electon configuration:[He]2p5,However,when it becomes Fluoride ion,it gains one electron to complete its outermost shell to obtain an octet configuration and becomes [He]2p6.

7 0
3 years ago
On the pH scale, a 7 indicates _____.<br> a base<br> an acid<br> neutrality
worty [1.4K]

The correct answer is:

neutrality

on the pH scale 7 is neutral above 7 is basic and below 7 is acidic.

Explanation:

The pH is an example of how acidic/basic water is. The scale goes from 0 - 14, with 7 being neutral, pH of less than 7 designates acidity, whereas a pH of greater than 7 intimates a base. pH is really a pattern of the relative amount of free hydrogen and hydroxyl ions in the water.pH is a measure of how acidic/basic water is.

It is neutral because, at this pH, the molar concentrations of Hydroxide and Hydronium are same, therefore the substance is not a base nor an acid.

3 0
3 years ago
A motorcyclist completes a journey at an average speed of 65 mph
Andrews [41]
227.5

Hope this helps :)
8 0
2 years ago
How many mol are in 8.23 x 10^24 formula units of calcium carbonate
tensa zangetsu [6.8K]

Answer:

13.7 moles

Explanation:

Given data:

Number of moles calcium carbonate = ?

Formula units calcium carbonate= 8.23 × 10²⁴

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

For 8.23 × 10²⁴ formula units:

one mole = 6.022 × 10²³ formula units

8.23 × 10²⁴ formula units × 1 mole /6.022 × 10²³ formula units

13.7 moles

7 0
3 years ago
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