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SSSSS [86.1K]
3 years ago
7

What are did facts about atomic number 20?

Chemistry
1 answer:
stira [4]3 years ago
3 0
<span></span>Basic Calcium Facts

Name: Calcium

Atomic Number: 20

Element Symbol: Ca

Group: 2

Period: 4

Block: s

Element Family: Alkaline Earth

Atomic Mass: 40.078(4)

Electron Configuration: [Ar]4s<span>2
</span>

Full: 1s22s22p63s23p64s2 (full)

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Balance the equation and write the reaction-quotient expression, qc. u(s) + f2(g) ----&gt; uf6(g)
Alona [7]
The equation presented above is that of uranium reacting with fluorine forming uranium fluoride. 

The chemical reaction can be balanced by carefully studying the equation and balancing the number of atoms of each of the element in both sides of the chemical reaction. That is,
 
                  <em>         U(s) + 3F₂(g) --> UF₆(g)</em>
4 0
3 years ago
Read 2 more answers
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

8 0
3 years ago
Which one of the following is a kind of organic
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3 years ago
Explain how a mixed solution of ethanoic acid and sodium ethanoate would be a suitable
Nadusha1986 [10]

Answer:

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Explanation:

correct me if I'm wrong ❤️

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2 years ago
I need help with the steps to do this problem: A metal is thought to be titanium or aluminum. When 4.7 g of the metal absorbs 11
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Explanation:

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