Ask question

Ask question

All categories

3 years ago

7

Calcium chloride has a melting point of 772°C, and water has a boiling point of 100°C. Which statement is true for calcium chlor

ide and water?

1 answer:

nekit [7.7K]3 years ago

4 0

The difference is due to the fact that calcium chloride has stronger intermolecular forces than water.

You might be interested in

A sample of an unidentified compound contains 29.84% sodium, 67.49% chromium, and 72.67% oxygen. What is the compound's empirica

vladimir1956 [14]

Answer:

i would help i just dont know sorry

Explanation:

5 0

2 years ago

Which half reaction correctly describes the reduction that is taking place

pickupchik [31]

<h2>Answer:</h2>

The correct answer is the option A which is: Cl2 + 2e- → 2Cl-

<h3>Explanation:</h3>

<em><u>Reduction is the gain of electrons and resulting in neutral or negative ions.</u></em>

<em><u>It is also the gain of hydrogen and release of oxygen ions.</u></em>

According to first most definition, option A describes the reduction.
Option B is incomplete reaction.
While C and D are oxidation reactions.

6 0

3 years ago

What type of plate boundary is<br> shown in the diagram below?

ryzh [129]

Answer : The second one

8 0

2 years ago

A metal sample is heated and placed into the water in a calorimeter at room temperature. Which statement best describes how the

rjkz [21]

Answer:

Energy transfers from the metal to the water and calorimeter until they are all at room temperature.

Explanation:

Calorimetry is the process that is used to determine the amount of heat that has been transferred in any process. In any chemical or physical process, the amount of energy is required. This energy is measured by the process of calorimetry. A calorimeter is a device that is used in this process. The heat that has been used in the process is measured and the change in the temperature is noted.

8 0

3 years ago

An important reaction in the formation of photochemical smog is the photodissociation of NO2: NO2 + hv >>> NO(g) + O(g)

vaieri [72.5K]

Explanation:

$NO_2 + hv\rightarrow NO(g) + O(g)$

The maximum wavelength of light that can cause this reaction is 420 nm.

a) The wavelength given lies in the range of visible light range that is from 400 nano meters to 700 nano meters.

The light with wavelength of 420 nm is found in the range of visible light.

b)The maximum strength of a bond :

$E=\frac{h\times c}{\lambda}$

where,

E = energy of photon = Energy required to break single molecule of nitrogen dioxide

h = Planck's constant = $6.626\times 10^{-34}Js$

c = speed of light = $3\times 10^8m/s$

$\lambda$ = wavelength = $420 nm=420\times 10^{-9}m$

$E=\frac{6.626\times 10^{-34}Js\times 3\times 10^8 m/s}{420\times 10^{-9}m}$

$E=4.733\times 10^{-19} J$

Energy required to break 1 mole of nitrogen dioxide molecules:

$= E\times N_A=4.733\times 10^{-19} J\times 6.022\times 10^{23} mol^{-1}$

$=285,012.66 J/mol=285.13 kJ/mol$

(1 J = 0.001 kJ )

285.13 is the maximum strength of a bond, in kJ/mol, that can be broken by absorption of a photon of 420-nm light.

c) the photodissociation reaction showing Lewis-dot structures is given in an image attached.

6 0

3 years ago