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ladessa [460]
4 years ago
9

Element X is a solid that is brittle, lacks luster,and has six valence electrons. In which group on the Periodic Table would ele

ment X be found
Chemistry
1 answer:
erastova [34]4 years ago
4 0

Answer:

Sulfur?

Explanation:

Sulfur has 6 valence electrons and does not have luster.

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Which of the following molecules have the ability to form hydrogen bonds with themselves?
ziro4ka [17]

Answer:

b. H3O c. H2SO4 d. HNO3

Explanation:

The hydrogen bonds can be form with molecules that have free electron pairs  and hydrogen atoms. In the case of NH4 molecule, the "free" electron pair in the nitrogen is not free because there is an hydrogen occuping them, and, in fact, this molecule has a positive charge. The other acids have free electron pairs in the oxigen, nitrogen or sulfur.

5 0
3 years ago
The atomic number of oxygen is 8 which indicates that there are 8
Zinaida [17]

Answer:

Protons

Explanation:

3 0
3 years ago
Strontium carbonate + sulphuric acid, chemical equation​
tangare [24]
<h3>Answer:</h3>

SrCO₃ + H₂SO₄ → SrSO₄ + H₂O + CO₂

<h3>Explanation:</h3>

We are required to complete the chemical equation given;

strontium carbonate + sulfuric acid → ??

  • We know that, carbonates reacts with acids to form a salt, water and carbon dioxide.
  • Strontium carbonate reacts with sulfuric acid to form strontium sulfate, water and carbon dioxide.
  • Therefore, the equation for the reaction is;

SrCO₃ + H₂SO₄ → SrSO₄ + H₂O + CO₂

  • The equation is balanced as the number of atoms of each element are equal on both sides of the equation.
7 0
3 years ago
Equal numbers of moles of He(g), Ar(g), and Ne(g) are placed in a glass vessel at room temperature. If the vessel has a pinhole-
mrs_skeptik [129]

Answer:

VP as function of time => VP(Ar) > VP(Ne) > VP(He).

Explanation:

Effusion rate of the lighter particles will be higher than the heavier particles. That is, the lighter particles will leave the container faster than the heavier particles. Over time, the vapor pressure of the greater number of heavier particles will be higher than the vapor pressure of the lighter particles.

=> VP as function of time => VP(Ar) > VP(Ne) > VP(He).

Review Graham's Law => Effusion Rate ∝ 1/√formula mass.

4 0
3 years ago
When a neat, ordered chemical is changed into a more disordered chemical, there is an increase in what?
polet [3.4K]
When a neat, ordered chemical is change into a more disordered chemical, then there is an increase in ENTROPY.
Entropy refers to the degree of disorderliness in a reacting system. The degree of entropy is considered to be zero, when there is no disorderliness. The degree of entropy increases as the disorderliness increases.  <span />
7 0
3 years ago
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