Answer:
2) total number of protons
Helium has an atomic number of one, and has only one proton in its nucleus.
Oxygen has an atomic number of 8 and an atomic mass of 16. From this we know that the atomic number measures the number of protons, and the atomic mass is the overal sum of protons and neutrons.
Just have to do antilog
[H+]= 10^-5.6
The energy of the photons is
<h3>Energy of Photons</h3>
The formula for calculating the energy of photons is expressed as:
where
- h is the Plank constant
- c is the speed of light
- λ is the wavelength
Substitute the values into the formula to have:
Hence the energy of the photons is
Learn more on energy of photons here; brainly.com/question/7464909
Answer:
39.72 g
Explanation:
Given data:
Mass of CsF = 15.2 g
Mass of XeF₆ = 260 g
Mass of Cs[XeF₇] = ?
Solution:
Chemical reaction:
CsF + XeF₆ → Cs[XeF₇]
Number of moles of CsF:
Number of moles = mass/ molar mass
Number of moles = 15.2 g/151.9 g/mol
Number of moles = 0.1 mol
Number of moles of XeF₆ :
Number of moles = mass/ molar mass
Number of moles = 260 g/245.28 g/mol
Number of moles = 1.06 mol
Now we will compare the moles of Cs[XeF₇] with both reactants.
CsF : Cs[XeF₇]
1 : 1
0.1 : 0.1
XeF₆ : Cs[XeF₇]
1 : 1
1.06 ; 1.06
Number of moles of Cs[XeF₇] produce by CsF are less so it will limiting reactant and limit the yield of Cs[XeF₇].
Mass of Cs[XeF₇]:
Mass = number of moles × molar mass
Mass = 0.1 mol × 397.2 g/mol
Mass = 39.72 g
Ca2+ and Cl- are examples of ions. There are two types of ions: (1) the positively charged which are called cations and (2) negatively charged which are more commonly referred to as anions.
The charges of the ions identify their reactions with other ions. Like charges do not react and repel each other while unlike charges will attract. Hence, in this item, the ions will attract each other. Further, the reaction between this two ions will form a formula unit, CaCl2.