Answer:
Model 1 represents the old geocentric model of the solar system and Model 2 represents the newer heliocentric model of the solar system.
Explanation:
Model 1 has earth in the center, therefore it is geocentric. the geocentric model of the solar system is old. Nobody believes in it anymore because it is scientifically inaccurate.
Model 2 has the sun in the center, therefore it is heliocentric. This is the newer model of the solar system.
Hello there!
When you burn the wood, some of the mass will go off as smoke. So, in a closed environment, the total mass of the area will stay the same, but the wood's mass will not.
I hope this helps!
Brady
Answer:
C₄H₃N
Explanation:
To solve this question we must find the moles of each atom in order to find the empirical formula (Simplest ratio of atoms present in a molecule). With empirical formula and the molar mass of the compound we can find the molecular formula as follows:
<em>Moles H:</em>
91.5mg H * (1mmol / 1mg) =
91.5mmol H
<em>Moles N:</em>
424mg N * (1mmol / 14mg) =
30.286mmol N
The ratio of moles regard to moles N (The lower number of moles is:
H = 91.5mmolH / 30.286mmolN = 3.0
N = 30.286mmolN / 30.286mmolN = 1
empirical formula = CₓH₃N
The molar mass of this formula is:
12*x + 1*3 + 1*14 = 17g/mol
Solving for X:
12X + 17g/mol = 65g/mol
12X = 48g/mol
X = 4
There are 4 atoms of carbon and molecular formula is:
<h3>C₄H₃N</h3>
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