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noname [10]
3 years ago
8

Whenever energy is ______ from one form to another, some of that energy is lost by being changed into heat.

Chemistry
1 answer:
schepotkina [342]3 years ago
5 0
Whenever energy is converted from one form to another, some of that energy is lost by being changed into heat.
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Please help do not get thanks
slega [8]
5. A
this is the answer check it out
6 0
3 years ago
A 7.06% aqueous solution of sodium bicarbonate has a density of 1.19g/mL at 25°C what is the molarity and molality of the soluti
lilavasa [31]

<em>c</em> = 1.14 mol/L; <em>b</em> = 1.03 mol/kg

<em>Molar concentration </em>

Assume you have 1 L solution.

Mass of solution = 1000 mL solution × (1.19 g solution/1 mL solution)

= 1190 g solution

Mass of NaHCO3 = 1190 g solution × (7.06 g NaHCO3/100 g solution)

= 84.01 g NaHCO3

Moles NaHCO3 = 84.01 g NaHCO3 × (1 mol NaHCO3/74.01 g NaHCO3)

= 1.14 mol NaHCO3

<em>c</em> = 1.14 mol/1 L = 1.14 mol/L

<em>Molal concentration</em>

Mass of water = 1190 g – 84.01 g = 1106 g = 1.106 kg

<em>b</em> = 1.14 mol/1.106 kg = 1.03 mol/kg

5 0
3 years ago
Read 2 more answers
If the density of a liquid is 5 g/mL and the mass is 65 g, what would the volume be?
Katyanochek1 [597]

Answer:

Volume would be 13

Explanation:

Divide the mass by the density

65/5

5 0
3 years ago
Read 2 more answers
25. The periodic table is based on an element's A. atomic number. B. molecular size. C. molecular mass. D. atomic mass.
VashaNatasha [74]
It is arranged by Atomic Number
8 0
3 years ago
Read 2 more answers
Select all statements that are correct:____
topjm [15]

Answer:

A, C and D are correct.

Explanation:

Hello.

In this case, since the relationship between the vapor pressure of a solution is directly proportional to the mole fraction of the solvent and the vapor pressure of the pure solvent as stated by the Raoult's law:

P_{vap}^{solution}=x_{solvent}P_{solvent}

Since the solute is not volatile, the mole fraction of the solute is not taken into account for vapor pressure of the solution, therefore A is correct whereas B is incorrect.

Moreover, since the higher the vapor pressure, the weaker the intermolecular forces due to the fact that less more molecules are like to change from liquid to vapor and therefore more energy is required for such change, we can evidence that both C and D are correct.

Best regards.

4 0
3 years ago
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