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spin [16.1K]
3 years ago
6

How many moles are in 124.0 grams of sodium hydroxide, NaOH (Molar Mass of 40.0 g/mol)

Chemistry
1 answer:
Setler [38]3 years ago
7 0

Answer:

a

Explanation:

a

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Please help me with chemistry
vodka [1.7K]

Table Giving Answer

Element Atomic mass % Amount

Mg_24     24                79    18.96

Mg_25 25                10    2.5

Mg_26 26                11   2.86

   

Total                     24.32

Discussion

The method of calculation for this table, which was done in Excel (a spread sheet) is shown below. Assume that there is 100 grams of material of "pure" magnesium. What is it's mass?

<em><u>Sample  Calculation</u></em>

The the sample atomic mass = 24

Mass = % * sample atomic mass

Mass = 79% * 24

Mass = (79/100) * 24

Mass = 18.96

<em><u>Note</u></em>

The other two elements are found exactly the same as the sample calculation.

Then all you do is add the 3 masses together.

Answer

The mass of Mg to 1 decimal place is 24.3 <<<< Answer.


7 0
3 years ago
9. You have a mini bottle of pure maple syrup. The full container has a mass of 137
cupoosta [38]

Answer:

A

Explanation:EDGE

7 0
3 years ago
Why is it good practice to perform a mixed melting point determination at two different ratios of unknown to known materials in
My name is Ann [436]

The melting point of a particular compound is fixed and it is an important identification of an unknown compound. The practice to determine the melting point of an unknown material In different ratio with a known material is important to get the exact melting point of the unknown material. In different ratio the melting point of the unknown material will be fixed as the melting point of a pure material doesn't depend on the ratio in which they are mixed with other material. To get the exact melting point it is always good to get the melting point twice in different ratio.  

6 0
4 years ago
In general the state of matter with the most energy is ?
CaHeK987 [17]

<u>Gas</u>

<em>Gas</em><em> </em><em>particles</em><em> </em><em>got</em><em> </em><em>the</em><em> </em><em>most</em><em> </em><em>energy</em><em> </em><em>because of how freely the molecules move</em>

Hope this helped you, have a good day bro cya)

8 0
3 years ago
Read 2 more answers
5. How do scientists analyze the TRAPPIST system? Write two key ideas. Work with a partner.
pentagon [3]

Answer:

They start with the planet furthest from us then go down the line of how many miles from us it is. Mars and Venus are the closests to us.

Explanation:

Its showing miles away it is and how fast it rotates and scientists study and analyze that.

5 0
3 years ago
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