PLS HELP URGENT
Electron dot diagrams
Use your periodic table to write the electron dot diagrams for the following atoms.
1. Calcium (Ca)
2. Polonium (Po)
3. Moscovium (Mc)
4. Boron (B)
5. Fluorine (F)
Answers
Related Questions
What will a balloon do to a cloth if its negatively charged
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Answer:
This involves negatively charged particles (electrons) jumping to positively charged objects. When you rub the balloons against the fabric they become negatively charged. They take some of the electrons from the fabric and leave them positively charged.
Explanation:
Negative charges attract to positive charges. If a balloon is not rubbed with the wool cloth, it has an equal amount of negative to positive charges, so it will attract to a rubbed balloon. When both balloons are rubbed with the wool cloth, the both receive negative charges, so they will repel each other.
How many kilograms of water must be added to 6.07 grams of oxalic acid (H2C2O4) to make a 0.025 m solution?
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M
a
V
a
=
M
b
V
b
M
a
= 6.77M - the initial molarity (concentration)
V
a
= 15.00 mL - the initial volume
M
b
= 1.50 M - the desired molarity (concentration)
V
b
= (15.00 + x mL) - the volume of the desired solution
(6.77 M) (15.00 mL) = (1.50 M)(15.00 mL + x )
101.55 M mL= 22.5 M mL + 1.50x M
101.55 M mL - 22.5 M mL = 1.50x M
79.05 M mL = 1.50 M
79.05 M mL / 1.50 M = x
52.7 mL = x
59.7 mL needs to be added to the original 15.00 mL solution in order to dilute it from 6.77 M to 1.50 M.
I hope this was helpful.
Helppp me pretty please
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Answer:
I think the correct answer would be the second one
What’s is CO written?
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Answer:
CO is a chemical formula that contains one carbon atom (C) and one atom of oxygen (O). Altogether, CO translates to "carbon monoxide."
Explanation: Why monoxide and not dioxide? Well, the prefix mono means "one," and di means "two." Since there is only one oxygen atom (-oxide), then it must be monoxide! Voila!!
Select the statements that are true about electronegativity between elements,
and their type of bond.
A. If the difference is over 1.7, an ionic bond will form.
B. If the difference in electronegativity is from 0.6 to 1.7, the bond
will be nonpolar and covalent.
C. If the difference in electronegativity is 2 to 2.5, the bond will be
nonpolar covalent.
Answers
Answer:
a
Explanation:
if the difference is over 1.7, an ionic bond will form
PLEASE HELP ME.!
This illustrates which stage of meiosis?
A) Anaphase II
B) Metaphase II
C) Prophase II
D) Telophase II
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Answer:
Anaphase II
Explanation:
what is a salient factor?
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Answer:
technology is a silent factor
Explanation:
learned about it in computer class.
A reaction is expected to produce 28.3 moles of hydrogen gas. If the hydrogen is collected at 297 K and 1.08 atm, what is the volume? 305 L H2 639 L H2 948 L H2 1,240 L H2
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Answer:
The correct answer is 639 L H₂
Explanation:
We use the ideal gas equation:
We have the following data:
n = 28.3 mol
T= 297 K
P= 1.08 atm
R= 0.082 L.atm/K.mol (gas constant)
We introduce the data in the gas equation to calculate the volume (V):
PV=nRT
⇒V =nRT/P = (28.3 mol x 0.082 L.atm/K.mol x 297 K)/(1.08 atm) = 638.2 L ≅ 639 L
Therefore, the correct option is 639 L H₂
Answer:
639 L H2
Explanation:
took the quiz
ur welcome
I will give any one Brainliest, Thanks, & a 5 rating who can Guess my Top 2 Phobia's.
I will give 1 hint for each though...
1st phobia hint is we creep & crawl everywhere we may be small but some people get scared.
2nd phobia hint is things that life is gone and no longer breathes
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Answer:
scared of bugs and dead things, or death itself?
Answer:
scared of bugs and dead things, or death itself?
Explanation:
Calculate the percent composition of oxygen in silicon dioxide.
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Answer:
then it is 5
Explanation:
because i said it is
Calculate the molarity of a solution that contains 85.0 g of Zn(C2H3O2)2 in 250. mL of solution (don't forget to convert mL to L first). Round to the nearest hundredth.
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Answer:
[Zn(C₂H₃O₂)₂] = 1.85M (3 sig-figs accurate to 0.01 Molar)
Explanation:
Concentration is defined as amount of solute in a specified volume of solution. That is, Concentration = mass of solute/volume of solution (solution = solute + solvent). When concentration is in terms of Molar values the essential relationship is Molarity(M) = moles solute / volume of solution in liters.
For this problem => first, convert mass of Zn(C₂H₃O₂)₂ into moles and then the volume of solution into liters. Take ratio of moles/volume of solution (L).
=> Molar Concentration = moles of Zn(C₂H₃O₂)₂ / Liters of solution
moles of Zn(C₂H₃O₂)₂ = 85.0 grams Zn(C₂H₃O₂)₂ / formula weight of Zn(C₂H₃O₂)₂ = 85.0g/183.5g·mole⁻¹ = 0.463 mole Zn(C₂H₃O₂)₂.
Volume of solution in Liters = 250ml / 1000ml/L = 0.250 liters
Molarity of Zn(C₂H₃O₂)₂ solution = 0.463 mole Zn(C₂H₃O₂)₂ /0.250 liters of solution = 1.85 Molar in Zn(C₂H₃O₂)₂
_____________
Note: The symbiology convention for 'molar solution concentration' is to place brackets around the molecular formula. That is, [Zn(C₂H₃O₂)₂] = 1.85M
True or false, the torch that is carried to the Olympic cauldron to be lit, is ignited by a match
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Answer:
true
Explanation:
Carbon is one of a few elements that bonds to itself. The scientific term for this is
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Answer:
Alkanes
Explanation:
Explanation:
The answer is Alkanes.Alkanes are compound that consists entirely of atoms of carbon and hydrogen joined to one another by single bonds
convert 0.881 mol N2 at STP to volume in liters
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Answer:
19.7 L N2
Explanation:
The volume of the nitrogen gas at STP is equal to 19.72 L.
What is the ideal gas equation?The ideal gas equation can be defined as an equation that describes the behavior of an ideal gas. This equation gives by the product of the volume and pressure is equal to the product of the moles of gas, gas constant, and absolute temperature.
The mathematical form of the ideal gas law is given as follows:
PV = nRT
Where n is the moles, V is the volume, R is the universal gas constant and P is the pressure.
The temperature of the N₂ , T = 0° C = 273 K
The pressure of the gas at STP, P = 1 atm
The value of the universal gas constant, R = 0.082 atm L/K mol
The number of moles of N₂, n = 0.881 mol
Fill in the values n, R, P, and T in the equation, and we get:
1 × V = 0.881 × 0.082 × 273
V = 19.72 L
Learn more about ideal gas equation, here:
brainly.com/question/3637553
#SPJ2
Pleade help me! (If you guys unfortunately I am going to report you) Thank you
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Sorry if I’m wrong
What are the
invisible lines
revealed by the
Iron fillings
surrounding a
magnet called?
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Answer:
At each end of a magnet is a pole. These lines of flux (called a vector field) can not be seen by the naked eye, but they can be seen visually by using iron fillings sprinkled onto a sheet of paper or by using a small compass to trace them out.
hope it's help
#carryONlearning3. Which of the following do all living organisms have in common? A. Cells held up by cell walls B. The method to get water and food into their cells C. Cells are made from pre-existing cells D. Special cells that can do many different things
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C7H6O3+ C4H6O3=C9H8O4+H20
- Balance the above equation.
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Answer:
2C7H6O3 + C4H6O3 - - - > 2C9H8O4 + H2O
Explanation:
Reactants:
2C7H6O3 + C4H6O3
C = 18
H = 18
O = 9
Products:
2C9H8O4 + H2O
C = 18
H = 18
O = 9
Does liquid detergent conduct electricity?
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Answer:
Yes, it is a good conductor of electricity.
Explanation:
They allow electric particles to pass through them (the bases).
(Hope this made sense)
A baker has two identical cakes except that one cake is hot, and the other cake is room temperature. He places both cakes on an ice-cold
plate. What happens? (Mark the one best answer.)
Both cakes transfer energy to the plate.
The plate transfers energy to the room temperature cake.
Neither cake transfers energy to the plate
Only the hot cake transfers energy to the plate.
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Answer:
the plate gets warmer and the cake gets colder
Explanation:
my brain
Which of these forces does not act over a distance?
A. Friction
B. Electric
C. Magnetic
D. Gravitational
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how would I solve this problem?
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Answer:
D
Explanation:
The goal in this set up is to make sure all units cancel each other.
Since we need to go from grams to atoms, our final unit should be atoms.
Using method of elimination, let's see why other options are wrong.
A - Although 'g' is cancelled out, we are left with moles^2 / atoms
B - Although 'g' is cancelled out, we are left with moles^2 / atoms
C - Although 'mol' is cancelled out, we are left with g^2 / atoms
HELPPP ASAPPP
Use the element tile below to calculate the molar mass of He2 (helium gas).
2 g/mol
16.012 g/mol
8.006 g/mol
4.003 g/mol
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Answer: 4.003 g/mol
Explanation:
So basically Molar mass is the atomic mass of an element and the atomic mass of Helium is 4.0026 or 4.003 g/mol
multiply the molar mass of helium (4.003) by the subscript and you have your answer!
A mixture of large, dispersed particles.
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Answer:
Colloids are mixtures in which one or more substances are dispersed as relatively large solid particles or liquid droplets throughout a solid, liquid, or gaseous medium.
Answer:
Colloids are mixtures in which one or more substances are dispersed as relatively large solid particles or liquid droplets throughout a solid, liquid, or gaseous medium.
Explanation:
I got the answer first
Calculate the number of moles of NaOH contained in 250. mL of a 0.05M solution?
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Answer:
0.0125 moles of NaOH are present
Explanation:
Molarity, M, is an unit of concentration widely used in chemistry. Is defined as the ratio between moles of solute (In this case, NaOH) and liters of solution.
250.0mL are = 0.250L of solution. As the molarity of the solution is 0.05M = 0.05moles / 1L, the moles present are:
0.250L * (0.05moles / 1L) =
0.0125 moles of NaOH are presentPlease help! Find the distance to each destination in AU. Use the correct conversion factor.
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Explanation:
The question involves converting from one unit (Kilometres) to another unit (Astronomical unit)
The relationship between both units is given as;
1 Km = 6.68459e-9 Au
Kulper belt
6.5 billion km = 6.5e9 Km
1 Km = 6.68459e-9 Au
6.5e9 Km = x
Solving for x;
x = 43.45 Au
Alpha Centauri
44 trillion km = 4.4e13
1 Km = 6.68459e-9 Au
4.4e13 km = x
Solving for x;
x = 294121.83 Au
Hi hello I need help ASAP
Determine the slope of this line
a.2.5
b.0.75
c.1
d.0.4
Answers
Answer:
so I got it wrong the first time but you should pick two points on the line such as 4,3 and 9,5. Then use the equation y^2 - y^1/ x^2 - X^1. You would get 2/5 which is D.
Explanation
need help to solve it
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Answer:
Divide by the molar mass to get moles
Explanation:
Someone help with this question
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Answer:
the answer is D the dominant over powers the resecive traits
What is the pH of a 2.0 × 10-4 M HCl solution?
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Answer:
pH = 3.69
Explanation:
HCl is a strong acid. It will disscociates completely into dissoluted ions such that,
[tex][H^+]=2\times 10^{-4}\ M[/tex]
The formula for pH is given by :
[tex]pH=-log[H^+]\\\\pH=-log(2\times 10^{-4})\\\\pH=3.69[/tex]
So, the pH of the solution is 3.69.
The answer to your question is 4.