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Ivahew [28]
3 years ago
15

Answer? giving brainlyest

Chemistry
1 answer:
salantis [7]3 years ago
6 0

Answer:

r=3

Explanation:

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Using the model of the Periodic Table, which two elements pictured have similar chemical properties?
liberstina [14]

Answer:

C) 1 and 3

Explanation:

A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. ... Arranged this way, groups of elements in the same column have similar chemical and physical properties, reflecting the periodic law.

5 0
3 years ago
What makes a substance pure?
Norma-Jean [14]

Answer: When a substance is pure, it is composed of one type of molecule. For example, table salt is only composed of (more or less) salt molecules, while seawater has water and salt molecules. A more complicated example of a non - pure substance is soil. It has many different types of nutrients and compounds.

5 0
3 years ago
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In the space provided, for each element, type the ionic charge of an atom with a full set of valence electrons. Then, type the n
kobusy [5.1K]

11. ionic charge +1, helium.

12. ionic charge 2-, neon.

13. ionic charge 3+, neon.

3 0
3 years ago
Which of these solutes raises the boiling point of water the most?
sergey [27]

Answer:

D. ionic sodium phosphate (Na3PO4)

Explanation:

Molecule for molecule, the solute that raises the boiling point of water the most is the one that makes the most particles in the solution. Lithium chloride breaks up into two ions (Li+ and Cl-). So does sodium chloride (Na+ and Cl-). Molecular molecules don't break up at all, so sucrose has only 1 particle per molecule. Sodium phosphate makes 4 total particles (3 Na+ ions and 1 PO4^3-). And magnesium bromide would make 3 particles (1 Mg2+ and 2 Br-). So the most is 4.

6 0
3 years ago
1. How many molecules are in 4.5 moles?
Naily [24]

Answer:

2.4 ⋅ 10 24

Explanation:

All that you need to know here is that in order for a given sample of water to contain exactly  1  mole of water, it must contain  6.022 ⋅ 10 23  molecules of water.

This is known as Avogadro's constant and essentially acts as the definition of a mole. If you have  6.022 ⋅ 10 23  molecules of water, then you can say for a fact that you have  1  mole of water.

6 0
2 years ago
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