Answer:
Pressure
Explanation:
Look at each Lewis Dot Diagram for the following elements. How many electrons are needed to fill the outer shell?
The number of electrons are needed to fill the outer shell of the given figures are 4,1 & 3 respectively.
What is Lewis dot structure?Lewis dot structure shows the boding within the molecule by showing the number of electrons and lone pairs present in each atoms present in that molecule.
As we know that bonding in any molecule takes place to complete the octet configuration of outer most shell and get stability.
In the figure (1), 4 electrons are shown in the outer shell then we need 4 electrons to complete the octet.In the figure (2), 7 electrons are shown in the outer shell then we need 1 electron to complete the outer most shell to complete the octet.In the figure (3), 5 electrons are shown in the outer shell then we need 3 electrons to complete the outer most shell to complete the octet configuration.Hence required no. of electrons are 4,1 & 3 respectively.
To know more about Lewis dot structure, visit the below link:
https://brainly.com/question/6605265
HF + NaOH ---> NaF + H2O
If you need 1785 g of NaF (sodium Fluoride) how many grams of HF (hydrofluoric acid) do you need?
Answer:
so calculate moles of 1785 g of NaF
this is something = 1785/41.98 =42.52 moles
now one moles of HF is forming one mole of NaF so to get 42.52 moles of NaF we need 42.52 moles of HF
mass = moles × molar mass
mass of HF = 42.52×20.01
mass of HF = 850.82 g
so the conclusion is if you need 1785 g of NaF (sodium Fluoride) you need 850.82 grams of HF (hydrofluoric acid) !!!
I d k it's right or wrong but i tried to solve it, please let me know is it correct or not!!
Which resource is renewable?
Plastic bottles of various sizes.
Dry, brown beans.
A silver bar on top of a gold bar.
Answer:
pinto beans!!
Explanation:
correct on edge
K,Co, is added to a volume of distilled water. Which of the following statements is correct? (1) The freezing and boiling points increase. (2) The freezing and boiling points decrease. (3) The freezing point increases and the boiling point decreases. (4) The freezing point decreases and the boiling point increases
A solution of HCl has a concentration of 3.4 x 10-3 M. What would be the [OH-] of this solution?
Answer:
a
Explanation:
uffvyffvfvf
Which of the following equations is balanced?
2H2 + O2 + 4H20
4Na + O2 - 2Na20
Fe2O3 + H2 - 2Fe + 3H20
CH4 + O2 - CO2 + H20
Answer:
4Na + O2 - 2Na20Is the balanced equations .
How many chloride ions are in a 220 grams of calcium chloride?
A)
1.3 x 1026 ions
B)
1.5 x 1028 ions
2.4 x 1024 ions
D)
3.0 x 1023
La
Answer: Hello, There! Your Answer is Below
2.4 x 1024 ions
Explanation:
220 g of CaCl₂ = X moles
Solving for X,
X = (220 g × 1 mol) ÷ 110.98 g
X = 1.98 moles
As,
1 mole contained = 1.20 × 10²⁴ Cl⁻ Ions
Then,
1.98 mole will contain = X Cl⁻ Ions
Solving for X,
X = (1.98 mol × 1.20 × 10²⁴ Ions) ÷ 1mol
X = 2.38 × 10²⁴ Cl⁻ Ions
Hope this Helps!
Have a great DAy!
`August~
2.4 × 1024 chloride ions are in 220 grams of calcium chloride. The correct option is c.
What is the calculation and what are chloride ions?Calculation
220 g of CaCl2 = X moles
Solving for X,
X = (220 g x 1 mol) 110.98 g
X = 1.98 moles
As
1 mole contains = 1.20 x 1024 chloride Ions
Then,
$1.98 mole will contain = X Chloride Ions
Solving for X,
X = (1.98 mol x 1.20 x 1024 lons) ÷ 1mol
X = 2.38 x 10²⁴ Chloride Ions
Chloride Ion is a chlorine anion that fo²²rms the negatively charged part of certain salts, including sodium and hydrogen chloride salts, and is an essential electrolyte located in all body fluids responsible for maintaining acid/base balance, transmitting nerve impulses and regulating fluid in and out of cells.
Chloride is a halide anion formed when chlorine picks up an electron to form an anion.
Learn more about chloride, here:
https://brainly.com/question/15296925
#SPJ6
For a constant waves speed,wavelength,of the wave increases with a(n)______
Answer:
higher frequency
Explanation:
What is the [OH-] in a solution that has a pH = 9.23? *
O 1.7x10^5
O 8.2x10^-9
1.7x10^--5 M.
Answer: 1.7x10^-5
Explanation:
pH + pOH = 14
14 - pH = pOH
14 - 9.23 = 4.77
pOH =4.77
[OH-] = 10^-pOH
= 10^-4.77
= 1.698243x10^-5
= 1.7x10^-5
4. How many moles of Ca(HCO3)2 are present in 4.6 liters of a 3.5 molarity
solution?
1. Scientists measured the spot size of guppies (small fish) in two different populations. Which
population has more guppies with large spots?
a
They both have the same number of guppies with large spots.
b
The population in Brazil has more guppies with large spots.
С
The population in Venezuela has more guppies with large spots.
d
These bar graphs do not show which population has more guppies with large spots.
Answer: the answer is C
Explanation:
Please help, due soon!
Different stimuli create various reactions in our bodies. Name the three types of stimuli. For two of these, give an example.
Answer:
three types of stimuli consists of
Mechanical,
thermal,
and chemical.
Explanation:
I really hope this helps have an amazing day, dont forget YOU ARE WORTH IT
Which of the following describes the skill level of a graduate of a doctorate program?
O expert
O competent
O novice capable
Answer:expert
Explanation:
What is the pH of a solution that is 100x more acidic than a solution with a pH of 5?
Answer:3
Explanation:
The pen on seismograph swings freely.
What is the potential difference across a light bulb when there is 32 A of current and 8 Ω of resistance from the filament.
Answer:
force ε: the increase in potential energy per unit charge provided by the chemical reactions in the battery. And the voltage difference across the light bulb is: ∆V = I R = (0.06 A)(20 Ω) = 1.2 V ▪If we measure the voltage difference across the battery or the light bulb, we will get 1.2 V.
Explanation:
please mark this answer as brainlest
A student measures out 5 mL of calcium chloride solution into a small container and 5 mL of sodium carbonate solution in another small container. The total mass of both chemicals and the containers they are in is 15.5 g. When the student combined the two clear liquids, a gooey, cloudy precipitate formed. What would the total mass of the products and the two containers be after this reaction took place?
Answer:
15.5g
Explanation:
"The total mass of both chemicals and the containers they are in is 15.5 g." After a chemical reaction, by conservation of mass, the total mass of the products and the two containers after reaction is the same at 15.5g.
Answer:
15.5
Explanation:
in a chemical reaction, mass is conserved
so mass after reaction = mass before reaction = 15.5 g
What type of reaction is this?
Answer:
Decomposition
this refers to the speed of an object at a specific moment in time
Answer:
Instantaneous speed is the speed of an object at a specific moment in time
Balance the following reaction
HgO → _ Hg +_ 02
Answer:
reeeeeeeeeeeeeeeeeeeee
Explanation:
cancer
How do you make crack and what are its effects?
How many half-lives will pass by the time 1.56% of I-131 is present? B. Approximately how many days does that equal? *
Answer: Hmmmmm that's crazy....
There are a couple of equations one could use for this type of problem, but I find the following to be the easiest to use and to understand.
Fraction remaining (FR) = 0.5n
n = number of half lives that have elapsed
In this problem, we need to find n and are given the FR, which is 1.56% or 0.0156 (as a fraction).
0.0156 = 0.5n
log 0.0156 = n log 0.5
-1.81 = -0.301 n
n = 6.0 half lives have elapsed
Explanation:
Just wanted to help. Hopefully it's correct wouldn't want to waster your time ;)
How do differences in
electronegativity and molecular shape
make some molecules more able to
absorb heat?
Answer:
So, higher electronegativity helps atoms take more control over shared electrons creating partial negative regions and partial positive regions which result in dipoles that cause polarity. The molecule's polarity will be determined on the negative and positive regions on the outer atoms in the molecule
Calculate the molarity of a solution of 0.030 mol of HCl in 0.15L of solution?
Answer:
0.20M
Explanation:
Molarity (by definition) = moles / Volume in Liters
∴Molarity = 0.030mol/0.15Liter = 0.20M
Which term describes the following group of planets: Jupiter, Saturn, Uranus, and
Neptune?
Answer:
Gas giants.
Explanation:
Jupiter, Saturn, Uranus, and Neptune are the gas giants of our solar system.
When are atoms considered stable?
when they have satisfied the law of conservation of mass naturally or through bonding to obtain
full valence shells
when they have satisfied the octet rule naturally or through bonding to obtain full valence shells
when their valence electrons have "fallen" back to ground state through bonding
Answer:
when they have satisfied the octet rule naturally or through bonding to obtain full valence shells
Explanation:
Generally, most atoms of an element are unstable because they have a void in their electron shell to fill, hence, they need to react with other elements to fulfil this task of octet.
Octet rule states that atoms of elements engage in reactions to form compounds so they can have eight (8) valence electrons in their shell. Noble gases e.g argon, neon etc. are elements that have naturally satisfied this octet rule by possession of 8 valence electrons in their shell. Other elements that do not have this naturally becomes reactive and enter bonding with other atoms to obtain full valence shells.
How can you provide a better explanation of what was happening that made the pie pans fly off the Van de Graaff generator?
Answer:
Due to repulsion.
Explanation:
Repulsion among electrons is responsible for fly off the pie pans from the Van de Graaff generator. When the globe of the generator charges up, the charge will move to the top part of the pie tin. The top region of pie tin accumulates charge and since it is not fixed at one place like upper half of the globe itself, it will be repelled by electrostatic forces between electrons that leads to fly off so we can say that similar charge of electrons is responsible for this fly off.
If anyone is taking Integrated Physics and Chemistry (2014) on sos can u pls help me w something !! Thanks
I am so sorry i cant help but good luck
When a strong acid is placed into water, what percentage of hydrogen ions (H+) will dissociate into the solution?
Can someone help me out with why is the outer core of Earth is important in you’re own words?! A mini paragraph plsss
Answer:
the outer core is important because the outer core is responsible for earth's magnetic field which protects earth from harmful particles that comes from sun and also contains some natural metal like nikle and iron.
is this much paragraph enough comment down below..
hope this helps you ☺️☺️