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spayn [35]
3 years ago
6

What mass of nitrogen Dioxide, NO2, would be produced by the decomposition of 75.0g of copper (II) nitrate?

Chemistry
2 answers:
Sedaia [141]3 years ago
7 0
<span>18.3963131798g NO2

(says my answer is too short so uhh... i did (75*mass of NO2)/mass of Cu(NO3)2</span>
Eva8 [605]3 years ago
6 0
Mole number of 75 g is 0.4 mol. NO2 is 0.8 mol and is 36.8 g.
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The density of ammonia gas under certain condition is 0.625 g/L. Calculate its density in g/cm³.
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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}

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4 0
2 years ago
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CORRECT ANSWER GETS BRAINEST!!! <br><br> Which element is in Group 6, Period 4? (Look at image)
vaieri [72.5K]

Answer:

Se

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Matter only moves if a force pushes or pulls is true
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Answer:

(a) All are correct

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xenn [34]

Answer:

See the complete question and the answer below

Explanation:

Sam and joe are trying to determine whether their ideas are scientific or pseudoscientific. sam's idea is not rejected when experiments produce different results. joe's idea gives the same result when tested repeatedly.  which statement is correct about sam and joe's idea?

<em>both ideas could be scientific. </em>

<em>neither idea could be scientific. </em>

<em>only sam's idea could be scientific. </em>

<em>only joe's idea could be scientific.</em>

<em />

The correct answer here would be that both ideas could scientific.

Scientific ideas are those that hold true or not rejected after being tested by different experiments. Pseudoscientific ideas cannot hold true after being tested by experiments.

If an idea is tested by repeated experiments and the experiments produce different results, the idea might remain unrejected if there are no overwhelming evidence to do so from the experiments. That an idea remains unrejected due to inadequate experimental evidence, however, does not mean it is scientific or unscientific.

In the same vein, that a repeatedly tested idea gives the same results does not mean that the idea is scientific unless the results say so. If results repeatedly go against the idea, it means such an idea is unscientific or pseudoscientific.

<em>Hence, both Joe and Sam's idea could be scientific, provided further experimental investigations are carried out.</em>

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