The simplest ratio of the constituent elements
Answer:
<em>yes</em>
Explanation:
the cuttle fish tell the difference between blue and yellow
Answer:
Volume of gold is 9.64 L
.
Explanation:
Given data:
Mass of gold = 85 g
Temperature = standard = 273 K
Pressure = standard = 1 atm
Volume of gold = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will calculate the number of moles of gold.
Number of moles = mass/molar mass
Number of moles = 85 g/ 197 g/mol
Number of moles = 0.43
1 atm × V = 0.43 mol ×0.0821 atm.L/ mol.K × 273 K
V = 9.64 atm.L / 1 atm
V = 9.64 L
When the solution is pure water so,
Kw = [OH-][H3O+]
when [OH-] = [H3O+] we can assume both = X
and Kw = 1.47 x 10^-14
by substitution:
1.47 x 10^-14 = X^2
∴ X = √(1.47 x 10^-14)
= 1.2 x 10^-7 M
Answer: <em>The hydrogen spectrum is an important piece of evidence to show the quantized electronic structure of an atom. ... It results in the emission of electromagnetic radiation initiated by the energetically excited hydrogen atoms. The hydrogen emission spectrum comprises radiation of discrete frequencies.</em>
<em />
Explanation: hope this helps ;D