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shtirl [24]
3 years ago
5

Why do metallic properties gradually change into non-metallic in the same period ?​

Chemistry
1 answer:
erma4kov [3.2K]3 years ago
8 0
Metallic and non-metallic properties
Non-metallic property increases across a period and decreases down the group due to the same reason due to an increase in nuclear attractive force.

I hope this helps
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reactions to break down glucose using oxygen to produce carbon dioxide, water and energy in the form of ATP. ... To balance the oxygen atoms for the reactant side, you need to count 6 atoms from the glucose.

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3 years ago
How many molecules are contained in 103.4g of sulfuric acid?
Ierofanga [76]
<h3>Answer:</h3>

1.827 × 10²⁴ molecules H₂S

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Compounds</u>

  • Writing Compounds
  • Acids/Bases

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
<h3>Explanation:</h3>

<u>Step 1: Define</u>

103.4 g H₂S (Sulfuric Acid)

<u>Step 2: Identify Conversions</u>

Avogadro's Number

Molar Mass of H - 1.01 g/mol

Molar Mass of S - 32.07 g/mol

Molar Mass of H₂S - 2(1.01) + 32.07 = 34.09 g/mol

<u>Step 3: Convert</u>

  1. Set up:                              \displaystyle 103.4 \ g \ H_2S(\frac{1 \ mol \ H_2S}{34.09 \ g \ H_2S})(\frac{6.022 \cdot 10^{23} \ molecules \ H_2S}{1 \ mol \ H_2S})
  2. Multiply:                                                                                                            \displaystyle 1.82656 \cdot 10^{24} \ molecules \ H_2S

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 4 sig figs.</em>

1.82656 × 10²⁴ molecules H₂S ≈ 1.827 × 10²⁴ molecules H₂S

4 0
3 years ago
Both hydrogen sulfide (H2S) and ammonia (NH3) have strong, unpleasant odors. Which gas has the higher effusion rate? If you open
Artist 52 [7]

Answer:

yooooo D kardi

Explanation:

3 0
3 years ago
Which of the following pairs of reactants will react together to produce water (H2O) as one of the products?
marusya05 [52]
These are two questions and two answers.

1) Question: Which of the following pairs of reactants will react together to produce water (H2O) as one of the products?

<span>Fe(OH)₃ and CuO
Cu(OH)₂ and H₂S
MgO and Ca(OH)₂
SO₃ and H₂O
</span>

<span>Answer:
</span>

<span>Cu(OH)₂ and H₂S
</span>

Justification:


1) Fe(OH)₃ and CuO: to form water Cu and Fe should react with each other. Being them two metals, they will not do that. So this reaction is not possible.

2) Cu(OH)₂ and H₂S: Being S a non metal and Cu a metal, they can react to form a the salt CuS, and water, as per this equation:


<span>Cu(OH)₂ + H₂S → CuS + 2H₂O
</span>

<span> 3) MgO and Ca(OH)₂: Being Mg and Ca two metals they will not react with each other, so this reaction is not feasible.
</span>

<span>4) SO₃ and H₂O: this is an acid oxide and water reaction which yields to an acid, as per this equation:
</span>

<span>SO₃ + H₂O → H₂SO₄
</span>

Which is not producing water


<span>2) Question: Based on reactivity, which of the following elements can replace aluminum (Al) in a compound during a single replacement reaction?

B
Ca
Zn
Fe
</span>

Answer: Ca.

Justification:

Only an element more reactive than Al will replace it <span>in a compound during a single replacement reaction.</span>

You may predict that being Ca an alkalyne earth element it is more reactive than Al and so Ca will replace Al.

Else,  you have to search a reactivity table, where you will find this order of reactivity among the metals:

Ca more reactive than Al

Al more reactive than Zn

Zn more reactive than Fe.
<span />

Being B a metalloid, its matallic character is low and it is less reactive than the other metals on the list.


6 0
3 years ago
Read 2 more answers
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