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umka21 [38]
2 years ago
6

PLEASE HELP!

Chemistry
1 answer:
Anon25 [30]2 years ago
4 0

Answer:

C. Mole

Explanation:

Chemical formula deals with mole number

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Is temperature beginning to rise a physical or chemical change?
Lelu [443]

Answer:

If temperature increases, as it does in most reactions, a chemical change is likely to be occurring. This is different from the physical temperature change. During a physical temperature change, one substance, such as water is being heated.

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The teacher tells your group to make a stock solution of sodium chloride, and then diluting it to
sergejj [24]

The idea here is that you need to figure out how many moles of magnesium chloride,

MgCl

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As you know, molarity is defined as the number of moles of solute, which in your case is magnesium chloride, divided by liters of solution.

c

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So, how many moles of magnesium chloride must be present in the target solution?

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n

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−

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Now determine what volume of the target solution would contain this many moles of magnesium chloride

c

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V

=

n

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0.0395

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0.01254 L

Rounded to three sig figs and expressed in mililiters, the volume will be

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12.5-mL

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3 0
2 years ago
The first order reaction of methyl isonitrile to form acetonitrile has a rate constant of k = 1.7 × 10−15 at 298 K. What will ha
ludmilkaskok [199]
Refer to to this chart 

Credits to <span>https://image.slidesharecdn.com/nybf09-unit2slides26-57-100125181507-phpapp01/95/nyb-f09-unit-2-slid...

As temperature decreases, rate decreases. 

As temp increases, k also increases. </span>

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3 years ago
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Which equation is used to help form the combined gas law? mc009-1. Jpg mc009-2. Jpg mc009-3. Jpg mc009-4. Jpg.
Luba_88 [7]

The combined gas law equation has been \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}.

The combined gas law has been assigned to the ideal gas. It has been stating that ideal gas are having negligible inter-molecular attraction and collision resulting in the absence of pressure and volume from the particles.

In an ideal gas the equation has been given as:

PV=nRT

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<em>V </em>has been the volume of the gas

<em>n </em>has been the moles of the gas

<em>R </em>has been a constant

<em>T </em>has been the temperature of the gas

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For more information about combined gas law, refer to the link:

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Which of the following lists describes characteristics of a base? (3 points)
mel-nik [20]

Answer:

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3 0
3 years ago
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