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dolphi86 [110]
3 years ago
14

How many milliliters of 0.281 M NaCl solution must be measured to obtain 0.177 mol of NaCl?

Chemistry
1 answer:
Usimov [2.4K]3 years ago
5 0

Answer:

630 mL

Explanation:

0.281 M = 0.281 mol/L

0.177 mol /0.281 mol/L =0.630 L

0.630 L=630 mL

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EleoNora [17]

Answer:

The specific heat capacity of the unknown metal is 0.223 \frac{J}{g*C}

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

  • Q= 418.6 J
  • c= ?  
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Replacing:

418.6 J= c* 75 g* 25 C

Solving:

c=\frac{418.6 J}{75 g*25 C}

c= 0.223 \frac{J}{g*C}

<u><em>The specific heat capacity of the unknown metal is 0.223 </em></u>\frac{J}{g*C}<u><em></em></u>

<u><em> </em></u>

<u><em></em></u>

3 0
2 years ago
In the formula for carbon tetrahydride, CH4, the percent composition of all elements is:
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3 years ago
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What effect does high temperature have on radish growth size?
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Explanation:

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2a² = 16r²

a = √8 r

As edge length of Strontium is 77.43pm:

77.43pm / √8 = r

27.38pm = r

<h3>Atomic radius of Strontium is 27.38pm</h3>

5 0
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The rotational period of the moon is_____
Ivahew [28]

Answer:

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Explanation:

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