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NeTakaya
3 years ago
7

How many number of atoms does these have?

Chemistry
1 answer:
Olin [163]3 years ago
3 0

Answer:

Explanation:

16. 12

17. 8

18. 9

19. 10

20. 5

21. 15

22.8

23. 24

24. 12

25. 3 i guess( some one comment for 25th pls)

26. 2

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12) SEP Use Mathematics Complete the table by identifying the atomic number and
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Answer:

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2 years ago
A flask is filled with 50.0 ml of 0.15 M HCl acid. Exactly 0.054 grams of CaCo3 are placed in the acid,
ira [324]

Answer:

See explanation

Explanation:

2HCl(aq) + CaCO3(aq) ------->CaCl2(aq) + CO2(g) + H2O(l)

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x = 2 *  0.00054/1

x = 0.00108 moles of HCl

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Reaction of HCl and NaOH

HCl(aq) + NaOH(aq) ------> NaCl(aq) + H2O(l)

Since the reaction is in the mole ratio of 1:1

0.00642 moles of HCl is neutralized by 0.00642 moles of NaOH

8 0
3 years ago
How does the size of the atoms relate to how reactive it is?
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What is the mass number of an iron atom that has 29 neutrons?
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Answer:

The answer is 54

Explanation:

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2 years ago
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