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KiRa [710]
3 years ago
11

Determine how many moles of Ba(OH)2 are required to completely neutralize 0.117 mole of HC2H3O2.

Chemistry
1 answer:
Naddika [18.5K]3 years ago
6 0
HC₂H₃O₂ (CH₃COOH) - acetic acid
-------------------------------------------------
2CH₃COOH + Ba(OH)₂ ----> (CH₃COO)₂Ba + 2H₂O
2 mol              1 mol

2 mol CH₃COOH -------- 1 mol <span>Ba(OH)₂
0,117 mol </span><span>CH₃COOH ------ X
X = 0,117/2
<u>X = 0,0585 mol  </u></span><span><u>Ba(OH)₂


</u>
</span>
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1. Isotopes of are atoms of the same element that vary in
Phantasy [73]

Answer:

1. D

2. B

Explanation:

1. Isotopes vary in neutrons. Due to this variance, the difference in neutrons change the mass of the element.

Note: the amount of protons in an element never changes. The number of protons (the atomic number on the periodic table) identifies the element in question. If you add or subtract protons, you change the element.

2. B-10 and B-11 are two isotopes of the element Boron: One with 10 neutrons, and another with 11 neutrons. Because they contain a variance of neutrons, they do not have the same mass. This cancels choices A and D.

The protons of an element are equal to the atomic number of that element. Borons atomic number is 5 (according to the periodic table), so it contains 5 protons. This cancels choice C as the element with 6 protons is Carbon.

Note: The amount of protons in an atom is balanced out by the same amount of electrons to allow for a neutral charge of the element (i.e., the protons, which contain a positive charge, and electrons, which contain a negative charge, cancel each other out. In the case of Boron: +5 protons - 5 electrons = 0 charge). This is why choice B is correct, as the consideration of an ion is not necessary for this question.

6 0
3 years ago
Based on your answer to part c, how many bonding electrons and nonbonding electrons are there in the lewis structure of hcn? ent
N76 [4]
Co2 is correct buddy
7 0
3 years ago
In the reaction
NemiM [27]

Answer:

3 moles of CO are needed

Explanation:

Given data:

Number of moles of CO used = ?

Mass of Fe produced = 112 g

Solution:

Chemical equation:

Fe₂O₃ + 3CO      →        2Fe + 3CO₂

Number of moles of Fe:

Number of moles = mass/ molar mass

Number of moles = 112 g/ 55.85 g/mol

Number of moles = 2.00 mol

Now we will compare the moles of iron and CO.

                   Fe        :         CO

                   2          :         3

Thus, 3 moles of CO are needed.

6 0
3 years ago
Help me, I don’t understand
marysya [2.9K]

Answer:

option c

Explanation:

ffuunkie. tfnhc dhrhrjebrjeieie

7 0
3 years ago
Read 2 more answers
How many moles is 1.25 x 1024 atoms of bromine?
Irina-Kira [14]

Answer:

2.08 moles (3 s.f.)

Explanation:

number of moles

= number of atoms ÷ Avogadro's constant

Avogadro's constant= 6.022 ×10²³

Thus, number of moles

= 1.25×10²⁴ ÷ (6.022 ×10²³)

= 2.08 moles (3 s.f.)

8 0
3 years ago
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