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vampirchik [111]
3 years ago
9

Which of the following is a period 4 representative element?

Chemistry
1 answer:
kondor19780726 [428]3 years ago
4 0

\huge{\mathbb{\tt { QUESTION↓}}}

Which of the following is a period 4 representative element?

O A. C

O B. An

O C. Ti

O D. K

\huge{\mathbb{\tt {ANSWER↓}}}

\color{blue}{\tt {A.C ( Carbon )}}

{\boxed{\boxed{\tt { WHAT  \: IS \:  CARBON?}}}}

  • Carbon (from Latin: carbo "coal") is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalen - making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust.

#CarryOnLearning

#LetsEnjoyTheSummer

<h3>→XxKim02xX</h3>
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Why is mining for coal a long-term concern?
Delvig [45]

Answer:

B

Explanation:

Coal is a non-renewable resource, so the supply can't produce faster than we can mine it.

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Answer:

Cu   +   2AgNO₃    →   2Ag   +  Cu(NO₃)₂

Explanation:

We are to give the reaction expression for this displacement reaction.

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copper (II) nitrate  = Cu(NO₃) ₂

So:

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3 0
3 years ago
How many milliliters of a 1.25 molar hydrochloric acid solution would be needed to react completely with 60 grams of calcium
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n(HCl)=cv
n(Ca)=m(Ca)/M(Ca)
n(HCl)=2n(Ca)

cv=2m(Ca)/M(Ca)

v=2m(Ca)/{cM(Ca)}

v=2*60/{1.25*40}=2.4 L


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