Answer:
the science behind this is 45
Explanation:
you times it by 4N²
divide it by ⁶Mn
2. How do you make a solution of lower concentration, using a stock solution of higher concentration.
Explain how we know that charge is conserved in this
reaction: Li+ CI → Lici
Answer:
Charge is conserved due to the groups in which Lithium and Chlorine are located in the periodic table of the elements.
Explanation:
In the reaction [tex]Li + Cl - > LiCl[/tex], we can examine the groups in which Li and Cl are found in the periodic table of the elements. Lithium appears in Group 1A, or the alkali metals group, indicating that it carries a charge of +1. Chlorine appears in Group 7A, or the halogen group, indicating that it carries a charge of -1. Because LiCl's constituent elements carry the same charges as previously mentioned, LiCl will have an overall charge of 0.
The chemical equation can then be rewritten as [tex]Li^{+} + Cl^{-} - > LiCl[/tex], which, if looking at the individual charges of Li and Cl in lithium chloride, becomes [tex]Li^{+} + Cl^{-} - > Li^{+}Cl^{-}[/tex]. Adding the charges on the reactant and product sides of this chemical equation gives us zero in both locations, meaning that we have a charge of 0 on the reactant side and a charge of 0 on the product side. This indicates that charge is conserved in this reaction.
Another way to look at this is expressed in the valence electrons of Li and Cl. Li has an electron configuration of [tex]1s^{2}2s^{1}[/tex], where the n = 2 electron shell has one of eight total electrons needed to fill the valence shell. This means that Li will easily lose one electron in order to have an electron configuration where the n = 1 electron shell is full, [tex]1s^{2}[/tex], and become the [tex]Li^{+}[/tex] ion. Similarly, Cl has an electron configuration of [tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}[/tex] (or [tex][Ne]3s^{2}3p^{5}[/tex]), meaning that the n = 3 electron shell is one electron away from becoming complete. Cl will easily gain one electron to have the electron configuration [tex][Ne]3s^{2}3p^{6}[/tex] (or [tex][Ar][/tex]) in order to have an electron configuration where the n = 3 electron shell is full, [tex]3s^{2}3p^{6}[/tex], and become the [tex]Cl^{-}[/tex] ion. Thus, when Li and Cl bond, Li will lose the electron [tex][1, 0, 0, +\frac{1}{2}][/tex] and transfer it to Cl, where it will become the electron [tex][3, 1, 1, -\frac{1}{2}][/tex], thus conserving charge, as there is an equal total number of electrons before and after the reaction.
1) Find the mass of 2.7 moles of NaCl.
Answer:
157. 788 grams
Explanation:
number of moles = mass/molar mass.
hence the mass = molar mass × number of moles
m = 58.44 × 2.7 = 157.788 grams
The term mole concept is used here to determine the mass of sodium chloride. The mass of 2.7 moles of NaCl is 157.78 g.
What is a mole?One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:
Number of moles = Given mass / Molar mass
The mole concept is a convenient method to express the amount of a substance. The elementary particles in moles may be atoms, ions, molecules etc.
The molar mass of NaCl = 58.44 g/mol
Here the number of moles of NaCl = 2.7
Mass = Molar mass × Number of moles
58.44 g/mol × 2.7 = 157.78 g
Thus the mass of NaCl is 157.78 g.
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How long are hard boiled eggs good for after peeled?.
Answer:
about 1 week
Explanation:
if you want to eat it after that smell it
PLEASE answer! Brainly if more than 2 answers - Liked comment - 5-star rating
Kepler-186f
a. Identify the element that makes up the initial composition of the star.
b. Explain the process of fusion between these atoms that occurs in all stars
I
A chemical blank
occurs when some substances
change chemically to other substances
Answer:
its a chemical Reaction
Explanation:
Which Barium Salt is insoluble in water?
a) Calcium Bromide b) Potassium Bromide
c) Silver bromide d) Sodium bromide
Answer:
D
Explanation:
What is the molarity of a salt solution made by dissolving 280.Omg of NaCl in 2.00mL of water. Assume the final volume is the same as the volume of the water.
Answer:
The molarity of a solution tells you how many moles of solute you get per liter of solution.Notice that the problem provides you with the volume of the solution expressed in milliliters mL.Right from the start you should remember that you must convert this volume to liters by using the conversion factor1 L=10+3mL
Explanation:
hope this helps if not please let me now
What is the volume of 1.60 grams of O2 gas at STP? (5 points)
1.72 liters
1.45 liters
1.32 liters
1.12 liters
Answer:
1.12 litersExplanation:
Calculating number of moles
Molar mass of O₂ = 32 gn = Given weight / Molar massn = 1.6/32n = 0.05 molesAt STP
One mole of O₂ occupies 22.4 LTherefore, 0.05 moles will occupy :22.4 L x 0.05 = 1.12 L1mol of any gas at STP contains 22.4L
moles of O_2
Given mass/molar mass1.6/320.05molNow
Volume of O_2:-
0.05(22.4)1.120LOption D
When the season changes and a bird migrates, the bird is responding to which of these?
an internal cue
an external cue please help
Answer:
Internal Cue
Explanation:
Answer:
an internal cue
Explanation:
just think
what is the difference between biology and anatomy?
Answer:
Biology is the study of nature, like plants and animals, while anatomy is the study of the human body, like our bones and muscles.
Explanation:
Hope it helped!