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netineya [11]
3 years ago
7

Two sets that contain the same number of elements are called​ _______.

Chemistry
1 answer:
8090 [49]3 years ago
4 0
They are called equivalent sets
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What net ionic equation describes the reaction between Pb(NO3)2(aq) and Na2CO3(aq)?
loris [4]

Answer:

Pb⁺²(aq) + CO₃⁻²(aq) →  PbCO₃ (s)

In net ionic equation we cancel the ions that have equal moles on both sides so  Na⁺¹ and NO₃⁻¹ have equal moles on both sides so we canceled them.

Explanation:

Net ionic equation:

In net ionic equation we only write the ions that are involved in reaction. If the system have same moles of ions in initial and final stages we cancel them as they have the same amount and are present in ionic form in the reaction medium. To formulate an ionic equation we just cancel the ions which have the same moles in initial and final stages.

Chemical equation:

Pb(NO₃)₂ (aq) + Na₂CO₃(aq) → PbCO₃ (s) + NaNO₃ (aq)

Balanced chemical equation:

In a balanced chemical equation we write the reactants and products in molecular form with number of moles.

Pb(NO₃)₂ (aq) + Na₂CO₃(aq) → PbCO₃ (s) + 2NaNO₃ (aq)

Ionic equation:

In ionic equation we write the equation in ionic form. It involves all the ions which will produce when we add any ionic compound in reaction medium.

Pb⁺² +2NO₃⁻¹ + CO₃⁻² + 2Na⁺¹  → PbCO3 (s) + 2NO₃⁻¹ (aq) + 2Na⁺¹ (aq)

Net ionic equation

In net ionic equation we cancel the ions that have equal moles on both sides. As we can see in the above ionic equation that Na⁺¹ and NO₃⁻¹ have equal moles on both sides so we canceled them.

Pb⁺²(aq) + CO₃⁻²(aq)  → PbCO₃ (s)

7 0
4 years ago
Read 2 more answers
Draw the lewis structure of sf2 showing all lone pairs.
abruzzese [7]

Answer :

The steps involved in the lewis-dot structure of SF_2 are :

  • First we have to determine the total number of valence electron in SF_2.

Number of valence electrons in S = 6

Number of valence electrons in two F atom = 2(7) = 14

Total number of valence electrons = 6 + 14 = 20 electrons

  • Placing a bonding pair of electrons between the atoms to form the chemical bonds.

Electrons used in bonding = 4

  • The remaining electrons are used as a lone pair for central or terminal atoms to achieve an octet to finish the Lewis dot structure.

Electrons used as a lone pair = 20 - 4 = 16

The image is shown below.

6 0
3 years ago
Which of the following reactions will not occur as written? Which of the following reactions will not occur as written? Sn (s) +
galben [10]

Answer:I have no idea

Explanation:

Why is this so complex…

6 0
3 years ago
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I need help balance equations BaCl2+NaOH=NaCl+Ba(OH) 2
gtnhenbr [62]

Answer:

BaCl2+ 2NaOH=2NaCl+Ba(OH)2

Explanation:

If you need an explanation on how I balanced it then let me know

8 0
4 years ago
Why can scientists get energy from plants
matrenka [14]
Becuase they have water and oxygen carbon dioxide in them   
3 0
4 years ago
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