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2 years ago

Ice is less dense than water because of which type of bond? metallic nonpolar covalent ionic hydrogen

Chemistry

2 answers:

cluponka [151]2 years ago

3 0

Hydrogen bond. Is the answer.

Vitek1552 [10]2 years ago

3 0

Answer: Hydrogen bond.

Explanation: Water is a polar covalent molecule in which two hydrogen atoms are bonded to central oxygen atom via single covalent bonds. So, metallic, nonpolar covalent or ionic choices are not correct. The only correct choice is hydrogen.

Hydrogen bonding is present in ice as we know that hydrogen bonding takes place when hydrogen is bonded to the more electron negative atoms(F, O or N). Density of ice decreases as the molecules are farther from each other due to the presence of hydrogen bonding. This hydrogen bonding breaks when ice melts to water and the molecules comes closer.

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Why ammonium is not a molecular ion

In-s [12.5K]

Answer:

See below

Explanation:

Ammonium $(NH_{4}^+)$ is not a molecular ion because it is just a poly-atomic ion. A molecular ion has a "negative or positive charge" as a whole but the positive charge on here is not on the whole. So, it is a poly-atomic ion and not molecular ion.

3 0

3 years ago

What is the maximum number of moles of N-acetyl-p-toluidine can be prepared from 70. milliliters of 0.167 M p-toluidine hydrochl

Kitty [74]

Answer:

$\large \boxed{\text{0.012 mol}}$

Explanation:

We will need a balanced equation with moles, so let's gather all the information in one place.

CH₃C₆H₄NH₂·HCl + (CH₃CO)₂O ⟶ CH₃C₆H₄NHCOCH₃ + junk

V/mL: 70.

c/mol·L⁻¹: 0.167

For simplicity in writing , let's call p-toluidine hydrochloride A and N-acetyl-p-toluidine B.

The equation is then

A + Ac₂O ⟶ B + junk

1. Moles of A

$\text{Moles of A} = \text{70. mL A}\times \dfrac{\text{0.167 mmol A}}{\text{1 mL A}}= \text{12 mmol A}$

2. Moles of B

The molar ratio is 1 mol B:1 mol A

Moles of B = moles of A = 12 mmol = 0.012 mol

$\text{You can prepare $\large \boxed{\textbf{0.012 mol}}$ of N-acetyl-p-toluidine. }$

3 0

2 years ago

Three treatments of different starting materials are listed. Which statement explains the treatments? Substance 1 was activated

iren2701 [21]

Substance 1 was activated by the heat and inactivated by ice, Substance 2 was activated by the change in concentration, and Substance 3 increased the surface area.

8 0

3 years ago

Read 2 more answers

Which of the following does not describe a solid

Liono4ka [1.6K]

Answer:

water is not a solid and a rock is a solid

4 0

2 years ago

Calculate the specific heat in J/(g·ºC) of an unknown substance if a 2.50-g sample releases 12.0 cal as its temperature changes

Degger [83]

Answer: