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sergejj [24]
3 years ago
8

Science please help me!!!!

Chemistry
1 answer:
balu736 [363]3 years ago
7 0
1)Atoms are the basic units of matter and the defining structure of elements. Atoms are made up of threeparticles<span>: </span>protons<span>, neutrons and electrons. </span>Protons<span> and neutrons are heavier than electrons and reside in the center of the atom, which is called the </span>nucleus<span>.

</span>
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What shape would a molecule of carbon tetrachloride have?
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Answer:

Tetrahedral

Explanation:

For the repulsion of the free electron pair theory, the shape of a molecule will be to repel the bonds and the free electrons on the central atom. In a molecule of carbon tetrachloride, the central atom (C) has no free electrons, so, the shape that repels better the charge is tetrahedral, as shown below.

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How do you test for starch in green plant
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1,Iodine solution is used to test leaves for the presence of starch. ...

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A 3-column table with 4 rows. The first column labeled Scenario has entries A, B, C, D. The second column labeled Object 1 has e
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Use the following equation to determine how many moles of C are needed to react with 0.500 mole of SO2.
Maru [420]

Answer:

The answer to your question is 1.25 moles of C

Explanation:

Reaction

                                5C  +  2SO₂   ⇒   CS₂  +  4CO

Check that the reaction is balanced

                          Reactant         Element        Product

                                5                   C                   5

                                2                    S                    2

                                4                   O                    4

Use proportions to find the moles of C needed.

                       5 moles of C -----------------  2 moles of SO₂

                       x  moles of C ----------------   0.500 moles of SO₂

                       x = (0.500 x 5) / 2

                       x = 1.25 moles of C

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