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Andru [333]
3 years ago
8

What does thermodynamics deal with? A. The transfer of heat and energy B. The properties of sound waves C. The movement of elect

rons D. The conservation of matter
Chemistry
2 answers:
Aneli [31]3 years ago
5 0
The correct answer is <span>A. The transfer of heat and energy

Sound waves, electron movement, and conservation of matter are studied by different parts of physics. Thermo is an ancient root word/prefix that is used to refer to heat. An example of that is a Thermos, which is supposed to save heat of a liquid.</span>
grin007 [14]3 years ago
5 0
A. The transfer of heat and energy

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How many grams of kbr must be dissolved to make 25.0 ml of a solution that has a molarity of 0.85 m?
lyudmila [28]
Molarity is defined as the number of moles of solute in 1 L of solution 
molarity of solution to be prepared is 0.85 M
this means that there should be 0.85 mol of KBr in 1 L of solution 
if 1 L contains - 0.85 mol
then 25.0 mL should contain - 0.85 mol / 1000 mL x 25.0 mL = 0.0213 mol 
mass of KBr - 0.0213 mol x 119 g/mol = 2.53 g
mass of KBr that should be dissolved in 25.0 mL is 2.53 g

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3 years ago
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olga2289 [7]

Answer:

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2 years ago
Why is the mass of the third subatomic particle ignored?
dmitriy555 [2]

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On the periodic table, the atomic number for each element can be found. This number is found by measuring the weight of 6.02 x 10^23 atoms of the element in grams. Electrons aren't ignored when finding exact math, but for the sake of simplification high school teachers will generally have you only count the number of protons and neutrons when calculating the mass of atoms.

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1 year ago
Crystals of a chemical in a lab slowly disappear from their container they do not become liquid. What change of state is this an
Olenka [21]
The change of state that has been given in the question is called sublimation. It is actually the process in which a solid gets directly converted to gas without changing into liquid. I hope that this is the answer that you were looking for and the answer has actually come to your desired help.
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