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Andrew [12]
3 years ago
12

Calculate the number of formula units in 1.87 mol of NH4Cl

Chemistry
1 answer:
Whitepunk [10]3 years ago
7 0
Hey I’m sorry bro I’m not sure if you are interested or t1 I can send link that you have to do that for you guys I can do that tomorrow if you want me to send you a link or if I say yes I will do that for you I can
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What is the heat in joules required to convert 75.0 grams of water into steam if the ^Hvap of water is 2257j/g?
nikitadnepr [17]

169 000 J. It takes 169 000 J to convert 75.0 g of water to steam.

<em>q</em> = <em>m</em>Δ<em>H</em>vap = 75.0 g x (2257 J/1 g) = 169 000 J

7 0
3 years ago
Jasmine is a cook, and she wants to buy new equipment. She is presented with dishes made of copper, clay, plastic, and glass. Sh
KATRIN_1 [288]
The awnser is number four <span>Copper is conductive and will absorb heat to cook the food. </span>
8 0
3 years ago
Which of the following is not correctly paired with its dominant type of intermolecular forces? 1. SiH4, instantaneous dipoles 2
Luda [366]

Answer:

Option 4. There's no hydrogen bonding between HBr molecules at all.

Explanation:

<h3>SiH₄</h3>

SiH₄ molecules are tetrahedral and symmetric. Dipoles due to the polar Si-H bonds balance each other. SiH₄ molecules are nonpolar. Only instantaneous dipoles are possible between those molecules.

<h3>C₆H₆ Benzene</h3>

Similar to SiH₄, benzene is symmetric. Dipoles due to the weakly polar C-H bonds balance each other. Benzene molecules are nonpolar. Only instantaneous dipoles are possible between those molecules.

<h3>NH₃</h3>

There are two conditions for hydrogen bonding to take place:

  • H atoms are directly bonded to a highly electronegative element: Nitrogen, Oxygen, or Fluorine.
  • There is at least one lone pair of electrons nearby.

Consider the Lewis structure of NH₃. There are three H atoms in each NH₃ molecule. Each of the three H atoms is bonded directly to the N atom with a highly polar N-H bond.  Also, there is a lone pair of electrons on the N atom. Hydrogen bonding will take place between NH₃ molecules.

NH₃ is a relatively small molecule. As a result, hydrogen bonding will be the dominant type of intermolecular force between NH₃ molecules.

<h3>HBr</h3>

There are three lone pairs on the Br atom in each HBr molecule. However, no H atom is connected to any one of the three highly electronegative elements: N, O, or F. The Br atom isn't electronegative enough for the H atom to form hydrogen bonding. HBr molecules are polar. As a result, the dominant type of intermolecular forces between HBr molecules will be dipole-dipole interactions (A.k.a. permanent dipole.)

<h3>CaO</h3>

Calcium is a group 2 metal. Oxygen is one of the three most electronegative nonmetal. (Again, the most electronegative elements are: Nitrogen, Oxygen, and Fluorine.) As a main group metal, Ca atoms tend to lose electrons and form positive ions. Oxygen will gain those electrons to form a negative ion. As a result, CaO will be an ionic compound full of Ca²⁺ and O²⁻ ions. Forces between ions with opposite charges are called ionic bonds.

7 0
3 years ago
How many atoms of Neon are in 65.0 L of Neon gas?
umka21 [38]

Answer:

65.0 g NH3 x

mol NH3

17.04 g NH3

x  

6.02x1023 NH3 molecules

mol NH3

= 2.30x1024 NH3 molecules

(have uh good day)

3 0
2 years ago
Read 2 more answers
a gas has a volume of 2.00 at 323k and 3.00 ATM What would be the new volume if the temperature is changed to 273 K in the press
Ber [7]

Answer:

V_2 = 5.07L

Explanation:

\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}\\V_2 = \frac{P_1 V_1 T_2}{T_1 P_2} = \frac{3.00atm \cdot 2.00L \cdot 273K}{323K \cdot 1.00atm} = 5.07L

6 0
2 years ago
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