The flame test is commonly used to identify different metal ions by how they get excited in the presence of a flame.
Typically a nichrome wire is dipped in a solution of metal cations and then presented to a flame. The flame emits a different color than normal, depending on the type of metal cation. Each metal ion gets excited by the flame and as the electrons change energy levels they emit a photon of light, thus changing the color. Since each metal cation has unique energy levels, the colors differ depend on the metal cation.
I hope this helps.
Answer:
4.16x10⁻³m
Explanation:
Molality is defined as the ratio between moles of a solute, in this case glucose, and kg of solvent.
As there are 100g of solvent, <em>the kg are 0.1. </em>Thus, we only need to calculate from the mass of glucose its moles to solve the molality of the solution.
<em>Moles glucose:</em>
There are 75mg = 0.075g of glucose. To conver mass to moles it is necessary molar mass.
Molar mass glucose:
6C = 12.01g/mol*6 = 72.06g/mol
12H = 12*1.008g/mol = 12.10g/mol
6O = 6*16g/mol = 96g/mol
72.06 + 12.10 + 96 = 180.16g/mol
Moles of 0.075g of glucose:
0.075g * (1 mol / 180.16g) =
4.16x10⁻⁴ moles of glucose
<em>Molality of the solution:</em>
4.16x10⁻⁴ moles of glucose / 0.1kg of solvent =
<h3>4.16x10⁻³m</h3>
It will affect the population size through the following:
<h3>
</h3><h3>What is Gestational period?</h3>
Gestational period is the period in which organisms carries its young in the
uterus before delivery. Animals which have short gestational period have a
high birth rate as they can get pregnant as many times a possible during the
year.
This therefore brings about an increase in the individuals present in the
ecosystem. The option A is therefore the most appropriate choice.
Read more about Gestational period here brainly.com/question/1305202
Answer:
f = 0.0123 × 10²⁰ s⁻¹
Explanation:
Given data:
Wavelength = 244 pm
Frequency = ?
Solution:
First of all we will convert the pm into meter.
244 pm. 1 m / 10¹² pm = 244× 10⁻¹² m
Formula:
f = c/ λ
f = frequency
c = speed of light
λ = wavelength
Now we will put the values in formula.
f = c/ λ
f = 3 × 10⁸ m.s⁻¹ / 244× 10⁻¹² m
f = 0.0123 × 10²⁰ s⁻¹
