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melomori [17]
3 years ago
8

PLEASE HELP QUICK ILL RRALLY APPRECIATE IT

Chemistry
1 answer:
geniusboy [140]3 years ago
7 0

Sugar-Compound

Salt Water- Liquid Solution

Air-Gaseous Solution

Sterling Silver- Solid Solution

Gold- Element

Hope this helps:)

If you could, would you please mark brainliest?

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Does anyone know how to do this???
Bond [772]
Simply look at the periodic table and fill in what you know based on the table

The number of protons = atomic number
The number of electrons, Which is the same as the atomic number for atoms.

The number of valence electrons that is given by the group that the element is in, the top number of each column in the periodic table.







8 0
3 years ago
How many moles of N2O5 are needed<br> to produce 7.90 g of NO2?
Roman55 [17]

Answer:

0.085 moles of  N₂O₅ are needed

Explanation:

Given data:

Mass of NO₂ produces = 7.90 g

Moles of N₂O₅ needed = ?

Solution:

2N₂O₅       →     4NO₂  + O₂

Number of moles of NO₂ produced :

Number of moles = mass/ molar mass

Number of moles = 7.90 g/ 46 g/mol

Number of moles = 0.17 mol

now we will compare the moles of NO₂   with N₂O₅.

                NO₂          :       N₂O₅

                  4            :          2

                0.17          :         2/4×0.17 = 0.085 mol

Thus, 0.085 moles of  N₂O₅ are needed.

4 0
3 years ago
Fill in the blanks i will mark brainlist and 20 points i need help asap plsss
gayaneshka [121]

Answer:

faster,  ocean, water,    Cooler,     less,     More,       Land.

Explanation:

4 0
2 years ago
A reasonable and educated guess based on what you know and observe is called a
krek1111 [17]

Answer:

Inference

Explanation:

4 0
3 years ago
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Dmitry_Shevchenko [17]
Sunlight is the requirement of every single natural process on Earth.
6 0
3 years ago
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