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garik1379 [7]
3 years ago
12

These cooked noodles were separated from the water they were cooked in. By which physical property were they separated? A. size

B. density C. magnetism D. boiling point
Chemistry
1 answer:
Papessa [141]3 years ago
4 0

Answer:

B. Density

Explanation:

Density is the only property of liquid in the option that is feasible.

Water has no form of magnetism as it’s not a magnetic substance.

Water carries the size of the container it is put into and has no definite shape.

Water’s boiling point can only be gotten when it’s heated and it’s known to be mostly 100 degree celsius when pure and may be more or less depending on the level of impurities.

However Density is the mass per volume of water and can be calculated before the noodle is cooked which is more effective in its differentiation.

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A student reacted NiS2 (MM = 122.83 g/mol) with O2 (MM=32.00 g/mol) to make SO2 (MM=64.07 g/mol) according to this balanced equa
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Answer:

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Explanation:

Given data:

Mass of NiS₂ = 1.50 ×10² g

Mass of O₂ = 2.420 ×10² g

Theoretical yield of SO₂ = ?

Solution:

Chemical equation:

2NiS₂ + 5O₂ → 2NiO + 4SO₂

Moles of NiS₂:

Number of moles = mass/ molar mass

Number of moles = 1.50 ×10² g / 122.83 g/mol

Number of moles = 1.22 mol

Moles of O₂:

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Number of moles = 2.420 ×10² g / 32 g/mol

Number of moles = 7.56 mol

Now we compare the moles of SO₂ with  NiS₂ and O₂.

                  NiS₂            :      SO₂

                    2                :        4

                   1.22             :       4/2×1.22 = 2.44

                    O₂               :          SO₂

                     5                :           4

                     7.56           :           4/5×7.56 =6.05

Moles of SO₂ produced by NiS₂ are less it will limiting reactant.

Mass of SO₂ = moles × molar mass

Mass of SO₂ = 2.44 mol ×  64.07 g/mol

Mass of SO₂ = 156.33 g

So theoretical yield of SO₂ is 1.56 × 10² g

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