Answer:
Ca₃N₂
Explanation:
The empirical formula is the simplest whole-number ratio between moles of each element present in a molecule.
Thus, we need to convert mass of each atom to moles and find the ratio between these as follows:
<em>Moles N:</em>
1.46g * (1mol / 14.0067g) = 0.104moles
<em>Moles Ca:</em>
6.27g * (1mol / 40.078g) = 0.156moles
The ratio between Moles N and moles of Ca is:
0.156moles / 0.104 moles = 1.5
That means there are 1.5 moles of Ca per mole of N. As empirical formula must be given in whole numbers:
There are 3 moles of Ca per 2 moles of N.
Empirical formula is:
<h3>Ca₃N₂</h3>
You need 0.111 g of NH₃ to provide the same number of molecules as
in 0.95 g of SF₆.
<em>Step 1</em>. Convert grams of SF₆ to moles of SF₆
Moles of SF₆ = 0.95 g SF₆ × (1 mol SF₆/146.06 g SF₆) = 0.006 50 mol SF₆
Now, we can use the knowledge that <em>1 mol of anything has the same number of molecules</em> (Avogadro’s number) <em>as 1 mol of anything else</em>
.
Thus, 0.006 50 mol NH₃ has the same number of molecules
as 0.006 50 mol SF₆.
<em>Step 2</em>. Convert moles of NH₃ to grams of NH₃.
Mass of NH₃ = 0.006 50 mol NH₃ × (17.03 g NH₃/1 mol NH₃) = 0.111 g NH₃
Answer:
Energy, more.
Explanation:
wavenumbers are directly proportional to energy and frequency of the radiation means that if one increases the other automatically increases whereas one decreases the other is also decreases. If the wavenumber increases, the energy of radiation is also increases while on the other hand, if the wavenumber decreases the frequency and energy of radiation is also decreases.
Answer:
impedes the flow of electrons
Explanation:
When electricity flowing in a circuit, that means the electron is flowing there too. All objects have resistance which tells how much the material impedes the flow of electron, which in turn will lower the current flowing on the circuit. It won't stop the flow completely. Material with high resistance will be called insulator and material with low resistance called a conductor.
Answer:
Explanation:
The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements. Every element in the first column (group one) has one electron in its outer shell.