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slavikrds [6]
3 years ago
12

If you dissolve 2.00 g of NiCl2*6h20 into a beaker of water and the final volume is 1.00 liters what will be the molar concentra

tion of the solution? HELPPPPPPPPPPPPPP
Chemistry
1 answer:
saveliy_v [14]3 years ago
5 0
Molar concentration (c) = # of moles of solute (n) ÷ volume of solvent (v) in liters
So the molar mass of Nickel Chloride Hexahydrate is 237.69 g/mol.
So the # moles of 2 gms is:
\frac{1mol}{237.69g}  \times  \frac{2g}{1}  = 8.414 \times  {10}^{ - 3} moles \\ c =  \frac{n}{v}  = \frac{8.414 \times  {10}^{ - 3} moles}{1 \: liter}   \\  = 8.414 \times  {10}^{ - 3}
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Will the volume of a 1.0 L sample of gas at STP change if the pressure and temperature are both doubled
Dmitry_Shevchenko [17]

Answer:

The volume will not change.  This belongs in Ripley's Believe It or Not.

Explanation:

The combined gas law can be used to model both the initial (1) and ending (2) states of a gas when pressure (P), temperature (T) and/or volume (V) change, but the number of moles does not.  Remember that temperature must always be in Kelvin.

P1V1/T1 = P2T2/T2

Rearranging for V2:

V2 = V1(T2/T1)(P1/P2)

I've arranged the pressure and temperature terms as ratios.  This makes it easier to see what impact changes will have, plus the units conveniently cancel for both.

(V2) = (1 L)(T2/T1)(P1/P2)

We are told that P2 and T2 are both doubled:

   (T2/T1) = 2

   (P1/P2) = 1/2

V2 = (1 L)(T2/T1)(P1/P2)

V2 = (1 L)(2)(1/2)

V2 = (1 L)(2)(1/2)

V2 - 1 L

The volume does not change.  Bummer.

7 0
2 years ago
If 16.4 grams of copper (II) bromide react with 22.7 grams of sodium chloride, how many grams of sodium bromide are formed?
fomenos

The amount of sodium bromide that would be formed from the reaction will be 7.5524 grams

<h3>Stoichiometric calculation</h3>

Looking at the equation of the reaction:

CuBr_2 + 2NaCl --- > CuCl_2 + 2NaBr

The mole ratio of CuBr2 and NaCl is 1:2.

Mole of 16.4 grams of CuBr2 = 16.4/223.37

                                                 = 0.0734 moles

Mole of 22.7 grams of NaCl = 22.7/58.44

                                                 = 0.3884 moles

Equivalent mole of NaCl = 0.1468 moles

Thus, NaCl is in excess while CuBr2 is limiting.

Mole ratio of CuBr2 and NaBr = 1:1

Mass of 0.0734 mole NaBr = 0.0734 x 102.894

                                              = 7.5524 grams

More on stoichiometric calculation can be found here: brainly.com/question/8062886

4 0
3 years ago
Use the periodic table to determine the electron configuration for Br and Y in noble-gas notation.
Gennadij [26K]

Answer:

[Ar]4s24p5

Explanation:

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8 0
3 years ago
Read 2 more answers
New oceanic lithosphere forms as a result of
Oksana_A [137]

Answer:

A. sea-floor spreading.

Explanation:

The sea-floor spreading is the result of the new oceanic lithosphere

3 0
3 years ago
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What causes hurricanes in the northern hemisphere to roster counterclockwise ?
Andrew [12]

Answer: The answer is D.

Explanation:

As the air rushes toward the center, it winds up moving in a curved path thanks to the Coriolis effect. This creates a circular spinning pattern as air travels from areas of high pressure to low pressure. That's why hurricanes originating in the northern hemisphere rotate counterclockwise.

Hope this helps!

8 0
3 years ago
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