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zhannawk [14.2K]
3 years ago
12

How many moles are present in a 24.5 gram sample of K2Cr2O7?

Chemistry
1 answer:
attashe74 [19]3 years ago
6 0
The answer to this is solved through stochiometry: the answer is  this: 0.0833mol

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Pressure, volume, temperature, # moles Pressure, volume and temperature, and moles of gas


Hope that helps!!!!
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3 years ago
How is the mass of 1 mole of an element determined? O A. It is equal to the atomic mass times Avogadro's number. O B. It is the
evablogger [386]

Answer:

Avogadro's number is the number of particles in one mole of anything. In this context, it is the number of atoms in one mole of an element. It's easy to find the mass of a single atom using Avogadro's number. Simply divide the relative atomic mass of the element by Avogadro's number to get the answer in grams.

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2 years ago
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77julia77 [94]

Answer:

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7 0
3 years ago
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Which of the following measurements is equal to 2.3 dL?
Verdich [7]
2.3 dL = .23 liters. d=deci=10^-1 so you move the decimal place back once.

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6 0
2 years ago
Read 2 more answers
A piece of wood that measures 2.7 cm x 5.5 cm x 3.9 cm has a mass of 84 g what is the density of the wood
Korolek [52]

The density of the wood : 1.45 g/cm³

<h3>Further explanation  </h3>

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of density  

The unit of density can be expressed in g/cm³ or kg/m³  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

  • Volume of the wood

\tt V=2.7\times 5.5\times 3.9=57.915~cm^3

  • density

\tt \rho=\dfrac{m}{V}\\\\\rho=\dfrac{84~g}{57.915~cm^3}=\boxed{\bold{1.45`g/cm^3}}

6 0
2 years ago
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