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algol [13]
2 years ago
10

BRAINLIEST IF CORRECT

Chemistry
1 answer:
Tpy6a [65]2 years ago
6 0

Answer:

Explanation:

He should use these for airborne sounds

MDF Fiberboard.

Gypsum Board.

Plasterboard.

Mineral Wool.

He should avoid using

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The expression below was formed by combining different gas laws. V is proportional to StartFraction n T over P EndFraction. Whic
Ronch [10]

Answer:

The Ideal gas law

Explanation:

From the given question, we have:

V \alpha \frac{nT}{P}

where each variable has its usual meaning.

Thus,

V = \frac{nRT}{P}

where R is the ideal gas constant

cross multiply to have;

PV = nRT

This implies that the volume of the gas is directly proportional to the number of moles of the gas.

Therefore, the law can be used to determine the relationship between the volume and number of moles is the ideal gas law.

3 0
3 years ago
Which method of heat transfer takes place when particular of matter vibrate and collide with each other in direct contact?
Luden [163]
Conduction - by touch
Convection - hot air rises, cold air sinks
Insulation - to insulate or capture heat
Radiation - by waves
Direct contact means touch, therefore the answer would be conduction.
5 0
3 years ago
Read 2 more answers
A chemist makes up a solution by dissolving 42.0 g of Mg(NO3)2 in enough water to produce a final solution volume of 259 mL. To
Igoryamba

Answer:

The molar mass of Mg(NO₃)₂, 148.3 g/mol.

Explanation:

Step 1: Given data

  • Mass of Mg(NO₃)₂ (solute): 42.0 g
  • Volume of solution: 259 mL = 0.259 L

Step 2: Calculate the moles of solute

To calculate the moles of solute, we need to know the molar mass of Mg(NO₃)₂, 148.3 g/mol.

42.0 g × 1 mol/148.3 g = 0.283 mol

Step 3: Calculate the molarity of the solution

M = moles of solute / liters of solution

M = 0.283 mol / 0.259 L

M = 1.09 M

7 0
2 years ago
Mrs. Johnson's science class perform an experiment. They combine two substances that react with lots of fizzing and bubbling. Th
s2008m [1.1K]

Chris is correct because the reactants and products do not have to have the same mass, but they do have to weigh the same.  Is the correct answer:) Hannah is right because the mass of the reactants was different than the mass of the products. is incorrect

3 0
3 years ago
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Covalent compounds do not conduct electric current in a water solution well because they _____.
siniylev [52]
Covalent compounds do not conduct electric current in a water solution well because they do not dissociate into ions.
5 0
3 years ago
Read 2 more answers
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