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hjlf
4 years ago
9

Hard water deposits (calcium carbonate) have built up around your bathroom sink. which of these substances would be most effecti

ve in dissolving the deposits
Chemistry
2 answers:
brilliants [131]4 years ago
7 0
The answer would be: <span> vinegar (acetic acid).

To dissolve deposit that calcified, you need to dissolve the calcium. Calcium is one of the metal that makes base pH. It will react with acid compound and produce a molecule of water. Ammonia, bleach, lye </span><span>, and baking soda are all base and won't react with the </span><span>calcium carbonate. Vinegar is acid and will react to it.

</span>
Stolb23 [73]4 years ago
6 0
Hello!

Vinegar would be most effective in dissolving the deposits of Hard Water.

Vinegar (CH₃COOH) is a weak acid, while Calcium Carbonate (CaCO₃), being the salt of a weak acid, will be a weak base. These two compounds will react together in the following way:

2CH₃COOH + CaCO₃ → (CH₃COO)₂Ca + H₂CO₃

H₂CO₃ reacts further to yield Water and CO₂

H₂CO₃ → H₂O + CO₂(g)

So, vinegar would be effective at dissolving CaCO₃, and we should see bubbles as a proof that a reaction has occurred.

Have a nice day!
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False, the radiation from food and medical procedures have very little consequences. The radiation from a nuclear power plant can kill people which makes it a very large problem if not contained properly.
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7 0
3 years ago
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What is the electron configuration of the chlorine atom after it gains an electron?
MatroZZZ [7]

Answer:

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4 0
3 years ago
Which phrase best describes bronze?
11111nata11111 [884]

Answer:

o A copper-tin alloy

Explanation:

  • <u>Bronze is composed by copper and tin.</u> This means it is not a pure metal.
  • <u>Bronze cannot be mined</u>, so it is not a mineral ore.
  • An ionic compound of copper and tin could also be theoretically used to describe a <em>non-solid </em>ionic compound of copper and tin. However bronze is solid.
  • Hence the answer is <em>A copper-tin alloy</em>.
7 0
3 years ago
Homelearning
kirill115 [55]

Answer:

Number of moles of Fe = 10 mol

Number of moles of CO₂ = 15 mol

Explanation:

Given data:

Number of moles of iron oxide = 5 mol

Number of moles of carbon monoxide = 25 mol

Number of moles of product = ?

Solution:

Fe₂O₃ + 3CO   →  2Fe + 3CO₂

Now we will compare the moles of reactant with product.

                  Fe₂O₃        :         Fe

                     1             :          2

                    5             :         2×5 = 10 mol

                Fe₂O₃        :         CO₂

                     1             :          3

                    5             :         3×5 = 15 mol

                  CO           :         Fe

                     3             :          2

                    25             :         2/3×25 = 16.7 mol

                  CO            :         CO₂

                     3             :          3

                    25             :         25

Less number of moles of Fe and CO₂ are formed by iron oxide thus it will act as limiting reactant while CO is inn excess.

                 

4 0
3 years ago
Lead has a density of 11.3 g/cm3 . what is the volume of a 15.1 g block of lead?
natita [175]
Hey there:

density = 11.3 g/cm³

mass = 15,1 g

Therefore: 

D = m / V

11.3 = 15.1 / V

V = 15.1 / 11.3

V = 1.336 cm³
3 0
3 years ago
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