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Igoryamba
3 years ago
5

Which of these statements about water is true?

Chemistry
2 answers:
jarptica [38.1K]3 years ago
8 0
I believe the statement that is true would be B.
sp2606 [1]3 years ago
6 0

Answer:

C. Its molecules are farther apart in the solid state than in the liquid state.

Explanation:

Water is composed of 2 H atoms and 1 O atom. The molecular formula for water is H2O.

A. False

Oxygen is more electronegative than hydrogen, as a result the electron pair is pulled closer to O.

B. False

Water is a polar solvent and therefore it will dissolve only polar molecules. Organic compounds like hydrocarbons are non-polar and will not dissolve in water

C. True

In the solid state i.e. in ice the hydrogen bonds are oriented such that the H2O molecules get pushed apart which also makes ice to have a lower density than water

D. False

Water has the highest specific heat value of 4.18 J/g C

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The number of particles in one mole of a substance is:
ankoles [38]

Answer:

Avogadro's number

Explanation:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

It means 1 mole of any substance contain 6.022 × 10²³ number of representative particles.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

35.45 g Cl⁻ = 1mole =  6.022 × 10²³  Cl⁻ ions

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

5 0
3 years ago
Which is the correct way to write 602,200,000,000,000,000,000,000 in scientific notation?
sladkih [1.3K]

Answer:

6.022 x 10^23

Explanation:

There are 20 zeros and the 022 are 3 more places.

3 0
4 years ago
Explain 1 difference between Prokaryotic and Eukaryotic cells. plz plz plz plz plz help me plzzzzzzzzzzzzz all my points this du
tiny-mole [99]

Answer:

Prokaryotes are organisms made up of cells that lack a cell nucleus or any membrane-encased organelles. Eukaryotes are organisms made up of cells that possess a membrane-bound nucleus that holds genetic material as well as membrane-bound organelles.

Explanation:

5 0
3 years ago
Read 2 more answers
IF YOU CAN HELP ME THAT WOULD BE GREAT
Likurg_2 [28]
Answer:
I. Changing the pressure:
Increasing the pressure: the amount of H₂S(g) will increase.
Decreasing the pressure: the amount of H₂S(g) will decrease.
II. Changing the temperature:
Increasing the temperature: the amount of H₂S(g) will decrease.
Decreasing the temperature: the amount of H₂S(g) will increase.
III. Changing the H₂ concentration:
Increasing the H₂ concentration: the amount of H₂S(g) will increase.
Decreasing the H₂ concentration: the amount of H₂S(g) will decrease.
Explanation:
Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.
I. Changing the pressure:
When there is an increase in pressure, the equilibrium will shift towards the side with fewer moles of gas of the reaction. And when there is a decrease in pressure, the equilibrium will shift towards the side with more moles of gas of the reaction.
For the reaction: CH₄(g) + 2H₂S(g) ⇄ CS₂(g) + 4H₂(g),
The reactants side (left) has 3.0 moles of gases and the products side (right) has 5.0 moles of gases.
Increasing the pressure: will shift the reaction to the side with lower moles of gas (left side), amount of H₂S(g) will increase.
Decreasing the pressure: will shift the reaction to the side with lower moles of gas (right side), amount of H₂S(g) will decrease.
II. Changing the temperature
The reaction is endothermic since the sign of ΔH is positive.
So the reaction can be represented as:
CH₄(g) + 2H₂S(g) + heat ⇄ CS₂(g) + 4H₂(g).
Increasing the temperature:
The T is a part of the reactants, increasing the T increases the amount of the reactants. So, the reaction will be shifted to the right to suppress the effect of increasing T and the amount of H₂S(g) will decrease.
Decreasing the temperature:
The T is a part of the reactants, increasing the T decreases the amount of the reactants. So, the reaction will be shifted to the left to suppress the effect of decreasing T and the amount of H₂S(g) will increase.
III. Changing the H₂ concentration:
H₂ is a part of the products.
Increasing the H₂ concentration:
H₂ is a part of the products, increasing H₂ increases the amount of the products. So, the reaction will be shifted to the left to suppress the effect of increasing H₂ and the amount of H₂S(g) will increase.
Decreasing the H₂ concentration:
H₂ is a part of the products, decreasing H₂ decreases the amount of the products. So, the reaction will be shifted to the right to suppress the effect of decreasing H₂ and the amount of H₂S(g) will decrease.
4 0
3 years ago
What is the energy of a wave with wavelength of 4.2 x 10-7 m. (Hint: Calculate for frequency first.)
erik [133]

Answer:

Option B. 4.74×10¯¹⁹ J.

Explanation:

The following data were obtained from the question:

Wavelength (λ) = 4.2×10¯⁷ m

Energy (E) =.?

Next, we shall determine the frequency of the wave. This can be obtained as follow:

Wavelength (λ) = 4.2×10¯⁷ m

Velocity (v) = constant = 3×10⁸ m/s

Frequency (f) =.?

v = λf

3×10⁸ = 4.2×10¯⁷ × f

Divide both side by 4.2×10¯⁷

f = 3×10⁸ / 4.2×10¯⁷

f = 7.143×10¹⁴ s¯¹

Therefore, the frequency of the wave is 7.143×10¹⁴ s¯¹.

Finally, we shall determine the energy of the wave using the following formula

E = hf

Where

E is the energy.

h is the Planck's constant

f is the frequency

Thus, the enery of the wave can be obtained as follow:

Frequency (f) = 7.143×10¹⁴ s¯¹.

Planck's constant = 6.63×10¯³⁴ Js

Energy (E) =..?

E = hf

E = 6.63×10¯³⁴ × 7.14×10¹⁴

E = 4.74×10¯¹⁹ J

Therefore, the energy of the wave is 4.74×10¯¹⁹ J.

5 0
3 years ago
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