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Degger [83]
3 years ago
7

NO ONE ANSWERS MY QUESTIONS

Chemistry
1 answer:
leva [86]3 years ago
3 0

Answer:

where is the answer options because it sounds like I need some

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Write the following number correct to 2 significant figures: 3644000<br><br> Hurry Plz NO TIME!!!
Nadusha1986 [10]
3644000 rounded to 2 significant figures is equivalent to 3.6
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Chemicals A and B react according to the equation A + B → C. How will the concentrations of each component of the reaction chang
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The concentration of a and b will decrease while c will increase provided all other physical quantities are kept constant in the reaction
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What is the mass of 2.50 moles of NaCl
garik1379 [7]

Answer:

The mass of 2,50 moles of NaCl is 146, 25 g.

Explanation:

First we calculate the mass of 1 mol of NaCl, starting from the atomic weights of Na and Cl obtained from the periodic table. Then we calculate the mass of 2.50 moles of compound, making a simple rule of three:

Weight NaCl= Weight Na + Weight Cl=  23 g+ 35,5 g= 58, 5 g/ mol

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2,5 mol---x= (2,5 mol x 58, 5 g)/ 1 mol = <u>146, 25 g</u>

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Hydrides are compounds made up of hydrogen and metal. Why ammonia has the highest boiling point among the hydrides of elements i
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The correct option is D.
The hydrogen atoms that are attached to the nitrogen atom in the ammonia molecule are capable of forming hydrogen bond. The hydrogen bond that exist in the ammonia molecule is the reason why it shows higher boiling point compare to the other hydrides. Hydrogen bond occur in ammonia because ammonia is one of the most electronegative elements. 
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