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maw [93]
3 years ago
5

True or false, a materials melting point and freezing point are the same.

Chemistry
2 answers:
vovangra [49]3 years ago
7 0

Answer:

I think that is true but I could be wrong

Explanation:

gayaneshka [121]3 years ago
5 0
True!

I hope I’m correct
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Please answers the question​
frozen [14]
That is correct hope that helps
8 0
3 years ago
86.1 g of nitrogen reacts with lithium, how many grams of lithium will react?
Zina [86]

Answer:

128g of Li, will react in this reaction

Explanation:

Before to start working, we need the reaction:

N₂ and Li react, in order to produce Li₃N (lithium nitride)

N₂ + 6Li → 2Li₃N

1 mol of nitrogen reacts with 6 moles of lithium

We convert the mass of N₂ to moles → 86.1 g . 1 mol/ 28g = 3.075 moles

1 mol of N₂ reacts with 6 mol of Li

Therefore, 3.075 moles of N₂ will react with 18.4 moles of Li

We conver the moles to mass → 18.4 mol . 6.94g / 1mol = 128 g

4 0
3 years ago
Why is it important to check the conductivity and pH of pure water for comparison
frozen [14]

it is important to check the conductivity and pH of pure water to:


1- to check the purity of water and if it healthy or not , and the water source.


2- we have to measure the PH to know the alkalinity or acidity of water. If the PH > 7 so it is acidic , if PH < 7 so it is alkaline.


3- we have to measure the conductivity of the water as it is an indication for the impurity level. and it shouldn't be high to keep the water healthy.



3 0
3 years ago
Read 2 more answers
Match the scientist to his contribution to the atomic theory - Thomson - Rutherford - Bohr A. Electron energy levels B. Nucleus
N76 [4]

Answer: Thomson - C

Rutherford - B

Bohr - A

Explanation: I just took the quiz

6 0
3 years ago
100.-gram sample of H2O() at 22.0°C absorbs 8360 joules of heat. What will be the final temperature of the water?
nexus9112 [7]
_Award brainliest if helped!
Assume Specific Heat capacity of water = 4.186 J/g<span>°C
100g sample, 
Q=mc</span>Δθ<span>
8360=100(4.186)(Final Temp.-22.0)
Final Temperature </span>≈<span>41.97</span><span>°C</span>
8 0
3 years ago
Read 2 more answers
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