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prisoha [69]
3 years ago
13

A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it? a V b Na c Mg d Se

Chemistry
1 answer:
wel3 years ago
8 0

Answer:

B.  Na

Explanation:

To identify an atom, you simply need to look at the number of protons.  This atom has 11 protons.  On the periodic table, you can see that the element with 11 protons is sodium (Na).

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Why do we use 51.0mL of NaOH but only 50.0mL of HCl?
bixtya [17]

Answer

Na OH reacts with H Cl and forms Na Cl and H₂O

NaOH + HCl   →   NaCl + H₂O                                              

Here we can see that  1 mole of NaOH reacting with 1 mole of HCl and forming 1 mole of NaCl and 1 mole of H₂O

when  NaOH and HCl are added together in equal amount then they will completely neutralize each other but NaOH is hygroscopic in nature which means it can absorb water from air so it will not be weighted accurately.

hence, for neutralization we will take extra NaOH.

3 0
3 years ago
Which list only includes terms that describe water?
Oxana [17]
D! It’s a pure substance and a compound
4 0
3 years ago
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Softa [21]

Answer:

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Explanation:

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Motor oil is a heavier hydrocarbon than gasoline hence it is more viscous than gasoline.

5 0
3 years ago
Read 2 more answers
Explain why the Chemicals properties of Mg 24 12 and Mg 26 12 are the same
Volgvan

Answer:

both Mg isotopes have same atomic number which is equal to number of protons , and the chemical properties of an element depends upon the the number of protons in its atom . and both Mg 24 12 and Mg 26 12 have same number of protons hence they exhibits similar chemical

okay

Explanation:

i hope it helped you .

5 0
3 years ago
When water freezes,it contracts true or false
Zigmanuir [339]
The correct answer is:  False.
_______________________________________________________
Water expands (gets larger/ is less dense in solid form than in liquid form) when it freezes).
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6 0
4 years ago
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