+6
I’m not 100% sure but let me know
Answer:
63.01284 g/mol
Explanation:
This compound is also known as Nitric Acid.
Convert grams HNO3 to moles or moles HNO3 to grams
Molecular weight calculation:
1.00794 + 14.0067 + 15.9994*3
Percent composition by element
Element Symbol Atomic Mass # of Atoms Mass Percent
Hydrogen H 1.00794 1 1.600%
Nitrogen N 14.0067 1 22.228%
Oxygen O 15.9994 3 76.172%
Answer:
The reaction is endothermic.
Yes, absorbed
3.06x10¹kJ are absorbed
Explanation:
In the reaction:
2HgO(s) → 2Hg(l) + O₂(g) ΔH = 182kJ
As ΔH >0,
<em>The reaction is endothermic</em>
<em />
As the reaction is endothermic, when the reaction occurs,
<em>the heat is absorbed.</em>
<em></em>
Now, based on the equation, when 2 moles of HgO (Molar mass: 216.59g/mol), 182kJ are absorbed.
72.8g are:
72.8g * (1mol / 216.59g) = 0.3361 moles HgO.
that absorb:
0.3361 moles HgO * (182kJ / 2 moles) =
<h3>3.06x10¹kJ are absorbed</h3>
<u>Answer:</u> The density of substance is ![3.38g/cm^3](https://tex.z-dn.net/?f=3.38g%2Fcm%5E3)
<u>Explanation:</u>
To calculate density of a substance, we use the equation:
![\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}](https://tex.z-dn.net/?f=%5Ctext%7BDensity%20of%20substance%7D%3D%5Cfrac%7B%5Ctext%7BMass%20of%20substance%7D%7D%7B%5Ctext%7BVolume%20of%20substance%7D%7D)
We are given:
Mass of substance = 61.6 g
Volume of substance = ![18.2cm^3](https://tex.z-dn.net/?f=18.2cm%5E3)
Putting values in above equation, we get:
![\text{Density of substance}=\frac{61.6g}{18.2cm^3}\\\\\text{Density of substance}=3.38g/cm^3](https://tex.z-dn.net/?f=%5Ctext%7BDensity%20of%20substance%7D%3D%5Cfrac%7B61.6g%7D%7B18.2cm%5E3%7D%5C%5C%5C%5C%5Ctext%7BDensity%20of%20substance%7D%3D3.38g%2Fcm%5E3)
Hence, the density of substance is ![3.38g/cm^3](https://tex.z-dn.net/?f=3.38g%2Fcm%5E3)
Answer:
The answer is
<h2>5.75 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula
![density = \frac{mass}{volume}](https://tex.z-dn.net/?f=density%20%3D%20%20%5Cfrac%7Bmass%7D%7Bvolume%7D%20)
From the question
mass of object = 23 g
volume = 4 mL
The density of the object is
![density = \frac{23}{4}](https://tex.z-dn.net/?f=density%20%3D%20%20%5Cfrac%7B23%7D%7B4%7D%20)
We have the final answer as
<h3>5.75 g/mL</h3>
Hope this helps you