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Sauron [17]
4 years ago
7

Steel is an example of a pure substance because it is made up of two different metals melted together. (4 points) True False

Chemistry
1 answer:
Lunna [17]4 years ago
3 0

Answer:

false

Explanation:

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The density of ammonia gas under certain condition is 0.625 g/L. Calculate its density in g/cm³.
oee [108]

Answer:

The density of Ammonia : 6.25.10⁻⁴ g/cm³

Further explanation  

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 density  

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

Density formula:  

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

ρ = density  

m = mass  

v = volume  

A common example is the water density of 1 gr/cm³  

Ammonia has a density of 0.625 g/L, then convert to g/cm³ :

\begin{gathered}\rm 1~L=1~dm^3=10^3~cm^3\\\\0.625~\dfrac{g}{L}\times \dfrac{1~L}{10^3~cm^3}\\\\\rho=\dfrac{0.625}{10^3}}\dfrac{g}{cm^3}=\boxed{6.25.10^{-4}\dfrac{g}{cm^3}}\end{gathered}

Learn more

4 0
2 years ago
Read 2 more answers
How can you get the knowledge of minerals chemical makeup or use?
Gre4nikov [31]

A. To determine how to break down minerals


7 0
3 years ago
How many moles of CO are there in 1.40 x 10^24 molecules.
viva [34]

Answer:

Explanation:

Mole = no. Molecules/6.02×10^23

Mole = (1.40×10^24)/(6.02×10^23)

Mole = 2.33mole

6 0
4 years ago
For a covalent bond to be polar, the two atoms that form the bond must have differing atomic weights.
sertanlavr [38]

Answer:

differing electronegativity

Explanation:

the electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

in ionic bond one of the 2 atoms attract the electrons from the another and don't share it so the electronegativity must be different to make the attract tendency different.

so,

first, when we speak about bond we should deal with electronegativity not the number of the neutrons or the melting points

second if the two electonegativities are similar then the electrons will be shared as in covalent bonds. but if they are different one will lose the electrons for the another one

5 0
3 years ago
NEED HELP ASAP!!
den301095 [7]

Answer:

3rd option

Explanation:

5 0
3 years ago
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