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Airida [17]
3 years ago
11

The gram formula mass of NH4Cl is(1) 22.4 g/mole (3) 53.5 g/mole(2) 28.0 g/mole (4) 95.5 g/mole

Chemistry
2 answers:
g100num [7]3 years ago
7 0
The answer is (3) 53.5 g/mol. The gram formula mass means that the mass of one mol compound. 1N=14, 4H=4, 1Cl=35.5. So the gram formula mass of NH4Cl=14+4+35.5=53.5 g/mol.
qwelly [4]3 years ago
6 0

Answer: Option (3) is the correct answer.

Explanation:

Gram formula mass or molar mass is the sum of mass of all the individual  atoms present in the compound or formula.

For example, gram formula mass of NH_{4}Cl is calculated as follows.

     NH_{4}Cl = Mass of N + 4 \times mass of H + mass of Cl

                            = (14.00 + 4 \times 1.00 + 35.45) g/mol

                             = (14.00 + 4.00 + 35.45) g/mol

                             = 53.45 g/mol

                             = 53.5 g/mol (approx)

Thus, we can conclude that the gram formula mass of NH_{4}Cl is 53.5 g/mol (approx)

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Calculate H for the process Hg2Cl2 ? 2Hg + Cl2 from the following information:
aleksandr82 [10.1K]

Answer:

The enthalpy of the reaction of the reaction asked in the question is 265.2 kJ.

Explanation:

Hg + Cl_2\rightarrow HgCl_2,\Delta H_1 = -224kJ...(1)

Hg + HgCl_2\rightarrow Hg_2Cl_2,\Delta H_2 = -41.2kJ..(2)

Hg_2Cl_2\rightarrow 2Hg + Cl_2,\Delta H_3=?...(3)

(1)+(2)

\Delta H_4=-224kJ+(-41.2kJ)= -265.2 kJ

2Hg+Cl_2\rightarrow Hg_2Cl_2,\Delta H_4=-265.2 kJ...(4)

On reversing the equation (4)we get (3):

\Delta H_4=-265.2 kJ =-(\Delta H_3)

Hg_2Cl_2\rightarrow 2Hg+Cl_2,\Delta H_3=265.2 kJ

The enthalpy of the reaction of the reaction asked in the question is 265.2 kJ.

6 0
3 years ago
A student claims that if she wanted to make a solution quickly, she should use small pellets instead of powder along with heatin
torisob [31]

Answer:

<em>I disagree with the student's claim</em>

<em></em>

Explanation:

<em>From basic chemistry, the rate of chemical reaction increases with an increased surface area.</em>

<em>This simply means that a powdered substance will react faster than a small pellet of the same substance.</em>

Let us break this down further. The pellet has a smaller exposed surface per grain to the solvent, here is how. Imagine the powdered substance bunched up together to make the small pellet, grains at the center of the pellet is blocked by other grains around it, and will take time before it comes in contact with the solvent. For the powdered grains, each grain has a surface independently exposed to the solvent and can easily come in contact with the solvent, taking less time to react with the solvent.

Technically, a powdered substance has more exposed surface area and logically will take a shorter time for the reaction to be complete.

4 0
3 years ago
If 25.8 grams of BaO dissolve in enough water to make a 212 gram solution, what is the percent by mass of the solution?
Scorpion4ik [409]
Mass of solute = 25.8 g

mass solution = 212 g

% =(  mass of solute / mass solution ) x 100

% = ( 25.8 / 212 ) x 100

% = 0.122 x 100

= 12.2 %



6 0
3 years ago
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erastovalidia [21]
They must have the same number of protons
6 0
3 years ago
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What is the graph that represents the relation between durability of titanium and temperature ?
matrenka [14]

The downward slope represents the relation between durability of titanium and temperature because with increase temperature, strength of titanium decreases.

<h3>Can titanium withstand temperatures?</h3>

Titanium alloys have high tensile strength to weight ratio, good toughness and an ability to bear extreme temperatures of more than 600 °Celsius. This shows that if temperature increase from more than 600 °Celsius, the strength of the titanium tends to decrease because it can not withstand to it so the graph comes to downward when the temperature exceeds to 600°C.

So we can conclude that the downward slope represents the relation between durability of titanium and temperature because with increase temperature, strength of titanium decreases.

Learn more about temperature here: brainly.com/question/4735135

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8 0
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