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3 years ago

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A student weighs out a 2.23 g sample of KF, transfers it to a 300 ml volumetric flask, adds enough water to dissolve it and then

adds water to the 300 mL tick mark What is the molarity of potassium fluoride in the resulting solution?

1 answer:

densk [106]3 years ago

7 0

Answer: i d8nt kn09.

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motikmotik

Answer:

1. Temperature is the measurement of how hot or cold something is.

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2. When something heats up, new energy is created, and when something cools down, energy is destroyed.

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3 years ago

Write the molecular formula of sodium nitroprusside.

saveliy_v [14]

Answer:

Explanation: Sodium Nitroprusside, whose molecular formula is • 2H2O, and whose molecular weight is 297.95. Dry sodium nitroprusside is a reddish-brown powder, soluble in water.

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3 years ago

A reaction mixture initially contains 0.86 atm NO and 0.86 atm SO3. Determine the equilibrium pressure of NO2 if Kp for the reac

dlinn [17]

Explanation:

Reaction equation for this reaction is as follows.

$NO(g) + SO_{3}(g) \rightarrow NO_{2}(g) + SO_{2}(g)$

It is given that $K_{p}$ = 0.0118.

According to the ICE table,

$NO(g) + SO_{3}(g) \rightarrow NO_{2}(g) + SO_{2}(g)$

Initial: 0.86 0.86 0 0

Change: -x -x +x +x

Equilibrium: 0.86 - x 0.86 - x x x

Hence, value of $K_{p}$ will be calculated as follows.

$K_{p} = \frac{P_{NO_{2}} \times P_{SO_{3}}}{P_{NO} \times P_{SO_{3}}}$

0.0118 = $\frac{x \times x}{(0.86 - x)^{2}}$

x = 0.084 atm

Thus, we can conclude that $P_{NO_{2}}$ is 0.084 atm.

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4 years ago

Identify the elements in the second, third, fourth, and fifth periods that have the same number of highest-energy-level electron

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Second- Beryllium (Be)
Third- Magnesium (Mg)
Fourth- Calcium (Ca)
Fifth- Strontium (Sr)

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3 years ago

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What type of structure are ionic lattices?

Dmitriy789 [7]

Answer:

Giant structures

Explanation:

An ionic compound is a giant structure of ions. The ions have a regular, repeating arrangement called an ionic lattice . The lattice is formed because the ions attract each other and form a regular pattern with oppositely charged ions next to each other.

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3 years ago

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