The atomic mass of K is 39
from Avogadro's law
39g of K contains 6.02x10^23 atoms
therefore if
39=6.02x19^23
X=5.11×10^22
making X the subject of the formula
X= (5.11×10^22×39)÷6.02×10^23
X= 33g
The statement, that describes grams of potassium (K) contain 5.11 × [tex]10^{22}[/tex] atoms is "33.1 g."
What is an atom?An atom is a fundamental particle of matter that contains at least one proton.
1 mole will be of 6.022 × [tex]10^{23}[/tex] atoms
Then,
[tex]= 5.11*10^{22} \;atoms\;.\;\frac{1\;mol}{6.022*10^{23} \;atoms} \;.\;39.098\;g/mol\\\\= 33.171\;g[/tex]
≈ 33.1 g
As a result, 33.1 g of K contains 5.11 × [tex]10^{22}[/tex] atoms.
Hence, the correct option is 33.1 g.
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Electronegativity is a chemical property which describes how well an atom can attract an electron to itself. Values for electronegativity run from 0 to 4. The difference in electronegativity (ΔEN) is used to predict whether a bond between atoms will be ionic or covalent. It can also be used to predict if the resulting molecule will be polar or nonpolar.
If a bond was made between the two atoms shown below, would the bond be (1) covalent, i.e. ΔEN = ≤ 0.4, (2) polar covalent i.e. ΔEN > 0.4 and ≤2.0, or (3) ionic, i.e. ΔEN > 2.0? Enter 1 for covalent, 2 for polar covalent, 3 for ionic.
protactinium, francium
#protactinium
It lies in 7th period having Z=91The outer electronic configuration is 6d^17s^2
d-block element(transition)So it will form polar covalent bond (2)
#Francium
Z=87Outer electronic configuration 7s^1
s-block elementIt will form ionic bond (3)
3nahco3(aq) + h3c3h5
What are the substances you start with in a chemical reaction called?
A. The intermediates
B. The products
C. The mixture
D. The reactants
Rock salt is a mixture of salt (sodium chloride) and sand. Describe how you would separate rock salt to obtain salt crystals and pure dry sand. In this question you get marks for how well your answer is written. You will get marks for: spelling, grammar, organising your ideas and information clearly and using key scientific words.
Answer:
pour the rock salt mixture throught a filter made from paper and allow the liquid to filtrate .
Explanation:
Separating Sand and Salt
Probably the easiest method to separate the two substances is to dissolve salt in water, pour the liquid away from the sand, and then evaporate the water to recover the salt.
Pour the liquid through a paper filter made of rock salt mixture and let it filter, after complete filtration we obtain crystals of salt.
What is filtration?Filtration is defined as the technique of removing solid particles from a liquid or gaseous fluid by passing the fluid through a filter media while keeping the solid particles behind.
It can also be defined as a physical method that uses a filter media with a complicated structure that only allows fluid to pass through to separate solid matter and liquid from a combination.
There are six types of filtration.
Vacuum filtrationCentrifugal filtrationGravity filtrationCold filtrationHot filtrationMultilayer filtrationMixture is defined as a substance that is composed of two more chemical compounds or substances that do not chemically mix.
There are two types of mixture.
Homogenous mixtureHeterogenous mixtureThus, pour the liquid through a paper filter made of rock salt mixture and let it filter, after complete filtration we obtain crystals of salt.
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Na is best known as a(n):
Answer:
sodium
Explanation:
sodium is an element with the atomic no. of 11 and atomic mass of approximately 23
helpppppppppppppppppppppp
Answer:
The process in which plants release water through their leaves back into the air
Explanation
Answer:
The process in which plants release water through their leaves back into the air.
Hope this helps!
A volume of 10.0 mL of 25 mg/L Mn2+ solution was diluted to make a solution with the final volume of 50.0 mL. Calculate the concentration (in mg/L) of the final solution
Taking into account the definition of dilution, the concentration of the final solution is 5 mg/L.
First of all, you have to know that dilution is the reduction in concentration of a chemical in a solution. The process consists of adding more solvent to the same amount of solute.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentration Vi: initial volume Cf: final concentration Vf: final volumeIn this case, you know:
Ci= 25 mg/L Vi= 10 mL Cf= ? Vf= 50 mLReplacing in the definition of dilution:
25 mg/L × 10 mL= Cf × 50 mL
Solving:
Cf= (25 mg/L × 10 mL)÷ 50 mL
Cf= 5 mg/L
In summary, the concentration of the final solution is 5 mg/L.
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brainly.com/question/20113402?referrer=searchResults brainly.com/question/22762236?referrer=searchResultsWhat is the density of a gas with a volume of 5.6 FL oz. and a mass of 37 grams?
Answer:
6.60
Explanation:
Which temperatures originally represented the fixed points
Celsius temperature scale?
Answer:Since 1743 the Celsius scale has been based on 0 °C for the freezing point of water and 100 °C for the boiling point of water at 1 atm pressure. Prior to 1743 the values were reversed (i.e. the boiling point was 0 degrees and the freezing point was 100 degrees).
Explanation: i no it
Question 5 of 5
The rows in the periodic table are called periods. What is true about elements
in the same period?
O A. They have the same atomic mass.
B. Their atomic numbers increase by 1 from left to right.
C. Their magnetism increases in strength from left to right.
D. They have similar chemical properties.
SUBMIT
Answer:
B. Their atomic numbers increase by 1 from left to right
chemical formula of vinegar + cream of tartar
Use the pie section above to answer this question.
The pie section shows Earth's composition from the center to the surface. Section IV is most likely composed of
solid iron.
basalt rock.
liquid iron.
granite rock.
Answer:
can you show me a picture of the pie chart?
Explanation:
if i dont see the pie chart then this question isn't possible to answer
List the steps in naming covalent compounds.
1. Name the non-metal furthest to the left on the periodic table by its elemental name.
2. Name the other non-metal by its elemental name and an -ide ending.
3. Use the prefixes mono-, di-, tri-.... to indicate the number of that element in the molecule.
4. If mono is the first prefix, it is understood and not written
Answer:
Rules for naming simple covalent compounds:
1. Name the non-metal furthest to the left on the periodic table by its elemental name.
2. Name the other non-metal by its elemental name and an -ide ending.
3. Use the prefixes mono-, di-, tri-.... to indicate the number of that element in the molecule.
4. If mono is the first prefix, it is understood and not written
Examples:
N2O4 is called dinitrogen monoxideCO2 is called carbon dioxideCO is called carbon monoxideN2O is called dinitrogen monoxide. (It is also called nitrous oxide but that is another naming scheme.)CCl4 is called carbon tetrachlorideHere is a chart of those prefixes:
1 - mono
2 - di
3 - tri
4 - tetra
5 - penta
6 - hexa
7 - hepta
8 - octa
9 - nona
10 - deca
lights of different frequencies make up
Answer:
Light waves come in a continuous variety of sizes, frequencies and energies, a continuum known as the electromagnetic spectrum. Once Maxwell introduced the concept of electromagnetic waves, everything clicked into place.
Explanation:
Hope this helps:)
~Kisame'sAbs
Synthetic reactions in Citric Acid Cycle
★ « Synthetic reactions in Citric Acid Cycle » ★
The overall reaction for the citric acid cycle is as follows: acetyl-CoA + 3 NAD+ + FAD + GDP + P + 2H2O = CoA-SH + 3NADH + FADH2 + 3H+ + GTP + 2CO2. Many molecules in the citric acid cycle serve as key precursors for other molecules needed by cells.hope it is
30 POINTS TO HONEST ANSWER WILL REPORT IF U JUST ANSWER FOR POINTS-
Which of the following correctly balances the equation below? 263 106 Sg 259 104 Rf
A. Y
B. 4 2 He
C. 0 -1 e
D. 0 1 H
Answer:
The answer is 4 2 He. I know this because alpha decay occurs when an unstable nucleus emits an alpha particle which is identical to a helium-4 nucleus.
Alex mixed soy sauce and vinegar and created mixture that has a uniform appearance all throughout. he also noticed that the components are not recognizable and are evenly mixed.Which type of mixture was he able to create
a.heterogeneous
b.homogeneous
c.solid in liquid
d.solid in liquid
Answer:
b.homogeneous
Can I have a Brainliest please?
Explanation:
Tin has the atomic number Sn (Z = 50).
(a). Give its electronic structure
(b). Is it one of the transition metals?
(c). Knowing that it loses its electrons in pairs and that the 4d subshell is not affected. What are the possible degrees of oxidation for this element?
Tin has electron configuration [Kr] 5s²4d¹⁰5p² and it is not a transition element because its outermost orbitals are 5s² 5p². It has oxidation states of +2 and +4.
The electron configuration of tin is [Kr] 5s²4d¹⁰5p². The electronic structure of an atom shows the arrangement of electrons in the atom of an element. The electrons are arranged in sub-shells.
Tin is not a transition metal because it has a completely filled d sub-shell and its outermost shell consists of ns, np orbitals.
Tin looses its electrons in pairs. Remember that the outermost orbitals are 5s² 5p². This means that tin can have two stable oxidation states, +2 and +4.
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How many molecules of NaCl are there per mL of the solution?
Explanation:
Nacl is an ionic compound, so there are no molecules only formula units please mark me brainlistWhat mineral is composed of sodium chloride (NaCl)?
Answer:
Salt
Explanation:
The mineral form halite , or rock salt is sometimes called common salt
THIS IS MY LAST WUESTION FOR MY TEST I ONLY HAVE 30 MINS LEFT TO ASNWER HELP.
Tiffany decided to make a salad for her lunch. She combined Lettuce, croutons, bacon,
cucumbers, cheese, ham and salad dressing into her bowl. As she was adding each different
ingredient, she tasted each one to make sure that she like it. When she was done, she ate her
salad. She noticed while she was eating the salad, that it had a different flavor than each of the
original ingredients. What type of change occurred?
Homogenous change
A solution change
A chemical change
A physical change
Looking at the above diagram, which side would be considered an acid AND explain how do you know this?
Answer:
The side with lots of H+ and low pH
Explanation:
Because one of the feature of an acid is the ability to dissociate to H+.
And it has lower pH because the concentration of H+ is more than OH-
Select the statements that correctly describe an asteroid. Check all that apply
Largest of the space rocks found orbiting the Sun.
Smallest of the space rocks found orbiting the Sun.
most are found between Mars and Jupiter
most are found between Jupiter and Saturn
Answer:
Explanation:
Most of this ancient space rubble can be found orbiting the Sun between Mars and Jupiter within the main asteroid belt. Asteroids range in size from Vesta – the largest at about 329 miles (530 kilometers) in diameter – to bodies that are less than 33 feet (10 meters) across.
If you take 35 mL of solution from (#2c) and add 0.225 L of water what is the concentration of the resulting solution in (% v/v)? (hint: you must determine the final volume first)
HELP
We want to find the concentration of the resulting solution of mixing 35mL of a given solution and 0.225 L of water.
We will find that the concentration is 13.5%.
First, we need to write both of these in the same units.
We know that:
1000 mL = 1L
Then:
35 mL = 0.035 L
So when we mix the solution and the water we end with a total volume of:
V = 0.035L + 0.225L = 0.260L
The concentration of solution will be equal to the quotient between the volume of solution we used (0.035 L) and the total volume of the mixture (0.260L)
We will get:
Concentration = (0.035L)/(0.260L) = 0.135
Now to write it as a percentage, we only need to multiply this by 100%.
0.135*100% = 13.5%
This means that the mixture has a concentration of the 13.5%.
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how many grams are present in 0.885 moles of manganese?
A. 48.6g
B. 62.1 g
C. 27.5 g
D. 0.016g
E. 21.5g
As per the details given, 48.6 g are present in 0.885 moles of manganese. The correct option is A.
To determine the gram contained in a given number of moles, use the element's molar mass. Manganese (Mn) has a molar mass of roughly 54.94 g/mol.
To calculate the grammes in 0.885 moles of manganese, use the following formula:
moles of Mn × molar mass of Mn = mass of Mn in grams
On calculating it:
0.885 moles × 54.94 g/mol = 48.60 g
Therefore, the mass of manganese present in 0.885 moles of manganese is 48.60 grams.
Thus, the correct answer is A. 48.6g.
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In the following reaction, how many liters of oxygen will react with 270 liters of ethene (C2H4) at STP?
C2H4(g) + 3O2(g) 2CO2(g) + 2H2O(g)
The volume of one mole of gas at STP is 22.4 liters.
What are the products of the chemical reaction shown?
CH4+2O2 --> CO2 + 2H2O
Question 10 options:
CH4 and O2
O2 and H2O
CO2 and H2O
CH4 and CO2
Answer:
CO2 AND H20 I THINK IM 99 PERCENT SURE
what is the difference between exergonic and exothermic reactions?
Answer:
An exergonic reaction is a type of chemical reaction that releases free energy to the surroundings. The final state of this reaction is less than its initial state. ... “Exothermic” literally means “outside heating” while “exergonic” literally means “outside work.”
Explanation:
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Have a happy day <3 Miss Hawaii
How do you prepare a demi-glace?
Answer:
Explanation:
sory i dont know
What is the mass of a baseball that has kinetic energy of 105 and is traveling at 10 m/s
Answer:
K.E =1/2 Mass×(velocity)2
Explanation:
1/2mass=K.E/Velocity 2
1/2mass=105/(10m/s)2
1/2mass=105/100m/s
1/2mass=21/20m/s
mass=21/20m/s ×2
mass=21/10
mass=2.1 Kilogram (put the value)
