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Mariana [72]
3 years ago
5

Which of the following types of molecules always has a dipole moment? Linear molecules with two identical bonds. Trigonal pyrami

d molecules (three identical bonds). Trigonal planar molecules (three identical bonds equally spaced). Tetrahedral molecules (four identical bonds equally spaced). None has a dipole moment.
Chemistry
1 answer:
natali 33 [55]3 years ago
8 0

Answer:

Trigonal pyramid molecules (three identical bonds)

Explanation:

In trigonal pyramidal molecule  like molecule of ammonia , the vector some of intra- molecular dipole moment is not zero because the bonds are not symmetrically oriented . In other molecules , bonds are symmetrically oriented in space so the vector sum of all the internal dipole moment  vectors cancel each other to make total dipole moment zero.

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How many molecules of copper sulfate are needed to produce 5.0×1024 molecules of sodium sulfate?
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Answer:

5.0 × 10²⁴ molecules

Explanation:

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2 NaOH + CuSO₄ ⇒ Na₂SO₄ + Cu(OH)₂

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We will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.

5.0 × 10²⁴ molecule × 1 mol/6.02 × 10²³ molecule = 8.3 mol

Step 3: Calculate the moles of CuSO₄ required to produce 8.3 moles of Na₂SO₄

The molar ratio of CuSO₄ to Na₂SO₄ is 1:1. The moles of CuSO₄ required are 1/1 × 8.3 mol = 8.3 mol.

Step 4: Calculate the molecules corresponding to 8.3 moles of CuSO₄

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4 0
3 years ago
Please show work:<br> Question below
ozzi

Answer:

b) 2.0 mol

Explanation:

Given data:

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Solution:

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now we will compare the moles of Ca and H₂O .

                          H₂O        :        Ca                

                             2           :        1

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Thus, 2 moles of Ca are needed.      

         

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2 years ago
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3 years ago
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