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zepelin [54]
3 years ago
14

HELPPPPP!!!!

Chemistry
2 answers:
Margarita [4]3 years ago
8 0

Answer:

sound waves travel.faster through materials that are more dense

o-na [289]3 years ago
8 0

Answer:

Sound wave scan travel faster through materials that are more dense.

Explanation:

The speed of sound depends on the elasticity and the density of the medium it is travelling. Generally sound travels faster in liquids than in gases and faster in solids than in liquids.

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A solution was made by dissolving 5.10 mg of hemoglobin in water to give a final volume of 1.00 ml. the osmotic pressure of this
Assoli18 [71]

The molecular weight of hemoglobin can be calculated using osmotic pressure

Osmotic pressure is a colligative property and it depends on molarity as

πV = nRT

where

π = osmotic pressure

V = volume = 1mL = 0.001 L

n = moles

R = gas constant = 0.0821 L atm / mol K

T = temperature = 25°C = 25 + 273 K = 298 K

Putting values we will get value of moles

moles=\frac{\pi V}{RT}=\frac{0.00195X0.001}{0.0821X298}mol

we know that

moles=\frac{mass}{molarmass}

Therefore

molarmass=\frac{mass}{moles}=\frac{5.10X10^{-3}g}{7.97X10^{-8}}=6.399X10^{4}g

5 0
2 years ago
Circulacion de electrones en un material conductor en determinado tiempo.
barxatty [35]

Answer:

falso

Explanation:

tiempo no determinado El circulation de elctrones

4 0
1 year ago
The mechanisms of most common reactions consist of two or more elementary steps, each of which describes a single molecular even
olga2289 [7]

Answer:

The correct answer is "True".

Explanation:

A reaction mechanism is a theoretical postulate that tries to explain in a logical way which are the elemental and intermediary reactions that happen in a chemical reaction and that allow to explain the qualitative and quantitative characteristics observed in its development, in which a unique molecular event is described in each elemental step.

Have a nice day!

3 0
3 years ago
Ice floats on water. For most other substances, however, the solid sinks in the liquid.
svetoff [14.1K]

Answer:The solid is less dense than the liquid

Explanation:

Ice is less dense than water because of the crevices or spaces in the lattice structure of ice. Liquid water has a much greater density than solid water because its molecules are more compactly packed than in ice. Ice has large spaces between the hydrogen bonded water molecules hence less density than the liquid. Being less dense than !liquid water, it floats on water.

7 0
3 years ago
What causes a change in a rocks compostion
son4ous [18]
Weathering i believe
5 0
3 years ago
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