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Rashid [163]
2 years ago
7

Which best describes heat?

Chemistry
2 answers:
lapo4ka [179]2 years ago
7 0

The correct answer is D. Energy that flows from a hot mug of tea to a cold hand

Explanation:

Heat refers to a type of energy that is the result of the motion of atoms in the matter; additionally, heat differs from other types of energy because this flows between objects or surfaces, usually as energy or heat flow from a hot surface to a colder one. Besides this, heat transference can occur due to conduction that involves direct contact of surfaces, radiation that involves electromagnetic waves or convection that involves movement of particles in liquids or gases. Thus, the statement that describes heat is " Energy that flows from a hot mug of tea to a cold hand" because this shows the flow of heat or energy from a hot surface to a colder one.

adelina 88 [10]2 years ago
3 0
The last option, "Energy that flows from a hot mug of tea to a cold hand." Hope this helps!

(This is because heat is the transfer of energy that you can well, feel. In simple terms. For this question and other like it you can do process of elimination because the only one that involves heat, is the last option.)
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Ten pints of 15 % salt solution are mixed with 15 pints of 10 % salt solution. What is the
sergij07 [2.7K]
Concentration\ rate=\frac{mass\ of\ product}{mass\ of\ substance}*100\%\\\\
15\%=\frac{m_1}{ms_1}*100\%\\ms_1=10pints\\
15\%=\frac{m_1}{10}*100\%\\
\frac{15}{100}=\frac{m_1}{10}\ \ |*10\\
m_1=\frac{150}{100}=1,5pints\\\\
10\%=\frac{m_2}{15}*100\%\\
0,1=\frac{m_2}{15}\ \ |*15\\
1,5=m_2\\
Resulting\ solution:\\
ms=ms_1+ms_2=15+10=25pints\\m=m_1+m_2=1,5+1,5=3pints
\\\frac{m}{ms}*100\%=\frac{3}{25}*100\%=12\%
7 0
2 years ago
As a part o a clinical study, a pharmacist is asked to prepare a modi ication o a standard 22 g package o a 2% mupirocin ointmen
son4ous [18]

Answer:

240 mg

Explanation:

In a dilution, the total quantity of the solute remains equal, so the concentration multiplied by the volume, or mass, of it, must be constant. In this case, the concentration is measured by the mass (w/w), so:

C1M1 = C2M2

Where C is the concentration, M is the mass, 1 is the concentrated solution, and 2 the diluted. The powder mupirocin has 100% of concentration, and the diluted solution will be mass equal to 22 g plus the mass added, so:

100%*M1 = 3%*(22 + M1)

100M1 = 66 + 3M1

97M1 = 66

M1 = 0.6804 g

But the ointment already has 2% of mupirocin, which is in mass:

0.02* 22 = 0.44 g

So, the mass needed to be added is 0.6804 - 0.44 = 0.24 g = 240 mg

4 0
2 years ago
Type in the maximum number of electrons that can be present in each shell or subshell below.
diamong [38]

<span>n = 5 shell=50</span>

<span>n = 2 shell=8</span>

<span>n = 2, l = 0 subshell=2</span>

<span>n = 2, l = 1 subshell=6</span>

<span><span>3d subshell=</span>10</span>

<span>2s subshell=2</span>

<span><span>5f subshell=14</span></span><span><span> sorry if I'm late I just did this! hope it helps..</span></span>
7 0
2 years ago
Read 2 more answers
An electrode has a potential of 1.201 V with respect to a saturated silver-silver chloride electrode. What would the electrodes
fredd [130]

Answer:

The potential wrt. calomel is 1.254 V

Explanation:

Given:

Potential wrt. silver chloride E_{Ag}  = 1.201 V

Potential wrt. saturated silver chloride E = 0.197 V

Potential wrt. SCE E_{Hg} = 0.241 V

Now potential wrt. hydrogen is given by,

   = 1.201- 0.197

   = 1.004 V

And we find for potential wrt. calomel,

   = potential wrt. hydrogen + potential wrt. SEC

   = 1.004 +0.241

   = 1.254 V

Therefore, the potential wrt. calomel is 1.254 V

7 0
2 years ago
What is the mass of 1.450 mol Cd3N2?<br> 124,2 g<br> 234.7 g<br> 529.6 g<br> 738.9 g
Degger [83]

Answer:

The answer is 529.6 g

Explanation:

I took the test and somehow got it right :0 but yea this is the correct answer. I hope this helps :)          

5 0
2 years ago
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