Answer:
The element that has the largest second ionization energy is;
Lithium, Li
Explanation:
The given elements and their positions on the periodic table are;
1) Lithium is located in group 1, period 2 position on the periodic table
2) Beryllium is located in group 2, period 2 position on the periodic table
3) Fluorine is located in group 17, and period 2 position on the periodic table
The first ionization energy of the atoms in the periodic table increases across the periods from left to right and also increases from bottom to the top within a group
However for the second ionization energy, which is the energy required to remove an electron from an atom that has one less electron, we have;
The electron configuration of the given of ions that take part in the reaction for the removal of the second ionization energy are;
Li⁺ = [He} 2s⁺
Therefore, the second ionization energy is the removal of an electron from the stable duplet of the helium atom (the core of the lithium atom) which require about 7297 kJ/mol
For beryllium, we have;
Be⁺ = [He]2S¹⁺
Therefore, the second ionization requires the removal of the remaining one electron in the valence shell, which will then lead to the remaining structure of the stable helium core and therefore, the second ionization energy of beryllium is about 1757 kJ/mol, which is low compared to helium
For fluorine, we have;
F⁺ = [He] 2s² 2p⁴⁺
Therefore, the second ionization of fluorine remains high due to the increased attraction of the positively charged fluorine ion for electrons than electrically neutral fluorine atom that has equal number of protons and electrons such that the second ionization energy of fluorine is higher than the first ionization energy and is about 3357 kJ/mol
Therefore, the element that has the largest second ionization energy is lithium, Li.
why is it important that the level of the sea water does not go above the level of the filter paper
Answer:
The water (the substance) that passes through the filter paper is called the filtrate. If your mixture is a solution, such as salty water, then filtering will not separate the salt from the water. Instead, by heating the soluton the solvent (water) evaporates leaving the solid (salt) behind.
Explanation:
How does the rock cycle work help use a easy understanding small summary
Answer: this is how it works
Explanation:
The magma bursts through Earth's surface in the form of a volcano. Heat and pressure deep in the Earth makes some rocks change to metamorphic rock. Layers of rock get squashed and packed together and gradually harden to form sedimentary rock. The igneous rock gets broken down by weather, and the cycle begins again.
why are cells small?
Answer:
you know what i really dont know but imagine if they were huge
Explanation:
How many torr, atms, and psi is 303.9 kPa equal to?
Torr=
Atms=
Psi=
I'LL NAME YOU BRAINLIEST AND GIVE YOU 20 POINTS, IF YOU HELP ME SOLVE THIS PROBLEM!!!!! /^?^/ !!!
Answer:
2.99 atm
2279.43 torr
44.07 psi
Explanation:
Torr, atms and psi all units are units of pressure.
Conversion from KPa to atm:
1 KPa is equal to 0.00987 atm. To convert from KPa to atm we will multiply the given value with 0.00987 atm.
303.9 KPa × 0.00987 atm / 1 KPa
2.99 atm
Conversion from KPa to torr:
1 KPa is equal to the 7.5006 torr. To convert from KPa to torr we will multiply the KPa value by 7.5006.
303.9 KPa × 7.5006 torr/ 1 KPa
2279.43 torr
Conversion from KPa to psi:
psi is pound per square inch. 1 KPa is equal to the 0.1450 psi. To convert from KPa to psi we will multiply the KPa value by 0.1450 psi.
303.9 KPa × 0.1450 psi / 1 KPa
44.07 psi
What does the speed of a sound depend on?
A.
the medium through which it travels
B.
the source from which it is emit
C.
the volume of the sound
D.
the pitch of the sound
What will be the mass of 9.95 liters of propane gas (C3H8) at STP?
Answer:
19.5g
Explanation:
Given parameters:
Volume of propane gas = 9.95L
Unknown:
Mass of propane gas = ?
Solution:
To solve this problem, find the number of moles first.
At STP;
22.4L of gas makes up 1 mole
9.95L of gas will have a [tex]\frac{9.95}{22.4}[/tex] = 0.44mole
So;
Mass of propane gas = number of moles x molar mass
Molar mass of propane = 3(12) + 8(1) = 44g/mol
Mass = 0.44 x 44 = 19.5g
Hydrazine, N2H4, and hydrogen, H2O2, have been used as rocket propellants. They react according to the equation:
H2O2 + N2H4 → N2 + H2O
a. How many moles of N2 are formed from 0.0250 moles of N2H4? (0.0250)
b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced? (0.675)
c. How many moles of H2O are formed if 1.87 moles of N2 is produced? (7.48)
Explanation:
The equation of the reaction is;
H2O2 + N2H4 → N2 + H2O
Upon balancing the reaction, we have;
N2H4 + 2H2O2 → N2 + 4H2O
a. How many moles of N2 are formed from 0.0250 moles of N2H4?
From the equation of the reaction;
1 mol of N2H4 produces 1 mol of N2
0.0250 mol of N2H4 would produce x mol of N2
1 = 1
0.0250 = x
x = 0.0250 * 1 / 1 = 0.0250 mol
b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced?
From the equation of the reaction;
2 mol of H2O2 produces 4 mol of H2O
x mol of H2O2 produces 1.35 mol of H2O
2 = 4
x = 1.35
x = 1.35 * 2 / 4 = 0.675 mol
c. How many moles of H2O are formed if 1.87 moles of N2 is produced?
The relationship between H2O produced and N2 is;
For every 1 mol of N2 produced, 4 mol of H2O is produced
1.87 mol of N2 produced, how many moles of H2O is produced?
1 = 4
1.87 = x
x = 1.87 * 4 / 1 = 7.48 mol
would using a strainer be filtration?
Answer:
To some extent, yes
Explanation:
i need help i hate multi selects. 100 points please let me know
Answer:
d would be both liquids and gasses
Explanation:
Answer:
A. Gases
B. Solids
C. Gases
D. liquids and solids
So basically all ur answers are right except D
Explanation:
Brainlist?
Which statement best describes the weather shown by the blue triangles going one way and the red semicircles going the other way on a line on a weather map?
A cold front can cause heavy rain, thunder, and lightning.
A stationary front may produce rainy or snowy weather for several days.
An occluded front can cause light to heavy precipitation that may last several days.
A warm front brings drizzly weather.
Answer: The statesmen that best describes the weather shown by the blue triangles going one way and the red semi-circles going the other way on a line in the weather map is “warm front brings drizzly weather.
Answer:
A stationary front may produce rainy or snowy weather for several days.
Explanation:
At what temperature will equal masses of HCl and NH4CI dissolve in 100g water?
Explanation:
NH4Cl at 90°C _.70 a ... m aximum amount of solute that will dissolve at that specific temperature (no ... A mass of 100 g of NaNO3 is dissolved in 100 g of water at 80°C. Is the ... SO2, NH3, HCl.
PLEASE MARK AS BRAINLIEST
What is the chemical formula for sodium sulfate
Answer:
Na2So4
Explanation:
Na is group 1, so has a charge of 1+
Sulphate’s formula is SO4 2-,
because sulphate has double the charge of Na, you need two Na’s to make it equal.
Therefore it’s Na2SO4
How many grams are present in 2.5 moles of silicon
Answer:
70.21375
Explanation:
rounded to he nearest tenth place 70.2
A small bubble rises from the bottom of a lake, where the temperature and pressure are 8°C and 6.4 atm, to the water's surface, where the temperature is 25°C and pressure is 1.0 atm. Calculate the final volume (in ml) of the bubble if its initial volume was 2.1 ml.
a. 0.070 ml
b. 21 ml
c. 14 ml
d. 42 ml
Answer:
b
Explanation:
How many atoms are there in 3.3 moles of strontium?
Explanation:
Multiply the moles Fe by 6.022×1023 atoms/mol
1) In the image below, determine the temperature in Fahrenheit.*
C 40
F
300
30
80
20
60
10
0
40
°F
Answer:
28.8889 or in simple terms 28.9 :) hope i helped
Explanation:
Answer:
28.8889 or in simple terms which I like to use is 28.9
Hi! I produce proteins inside the cell. What am I?
Answer:
ribosome is the cell
Explanation:
hsduuejxkwnckwnirj
Question 8 of 10
What is R in the ideal gas law equation?
A. The kinetic energy of the gas
B. The number of moles of the gas
C. The molar mass of the gas
D. The ideal gas constant
SUBMIT
Answer:
D
Explanation:
The ideal gas law is: pV = nRT, where n is the number of moles, and R is universal gas constant. The value of R depends on the units involved, but is usually stated with S.I. units as: R = 8.314 J/mol·K
What particles are contained in the nucleus of an atom?
O electrons & protons
O neutrons & electrons
O neutrons & protons
O pixels & electrons
Which one of the following is a chemical property?
A. A wood block is less dense than water
B. Gold bar is shiny
C. Bubbles form when baking soda and vinegar are mixed.
D. Water turns from liquid to gas at 1000C.
pls help thx
The forming of bubbles when baking soda and vinegar are mixed is a result of chemical property.
Chemical PropertiesChemical properties of materials are properties that are due to the chemical composition of the materials.
The formation of bubbles when baking soda is mixed with vinegar is a result of the evolution of carbon dioxide gas.
Baking soda reacts with vinegar to produce carbon dioxide and other products according to the chemical equation below:
NaHCO3 + CH3COOH → CO2 + H2O + CH3COONa
More on chemical properties can be found here: https://brainly.com/question/1728902?referrer=searchResults
What happens to the ice pack over time?
Answer:
it melts?
I don't really know but I have 60% that I think the answer is correct
please help i will mark brainlist
Answer:
432cm³
Explanation:
Given parameters:
Length = 12cm
Height = 6cm
Width = 6cm
Unknown:
V = ?
Solution:
We have been given that;
V = L x W x H
So;
V = 12cm x 6cm x 6cm = 432cm³
Which phase do the chromosomes line up in the middle
Answer:
metaphase
Explanation:
the cells chromosomes line themselves in the middle of the cell through a type of cellular tug of war.
Answer:
metaphase
Explanation:
During metaphase, the cell's chromosomes align themselves in the middle of the cell through a type of cellular "tug of war." The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids.
How many chickens would it take to kill an elephant?
Answer: One chicken with a bomb
Answer: 26,000 chickens
Explanation:
The beakers in the picture above are labeled according to the ionic solutions they contain. What metal or metals could replace copper in the copper(II) nitrate solution?
Explanation:
When a metal replaces another metal in solution, we say such a reaction has undergone a single displacement reaction.
In such a reaction, metal higher up in the activity series replaces another one due to their position.
To known the metal or metals that will replace the given copper, we need to reference the activity series of metals.
Every metal higher than copper in the series will displace copper from the solution.
So, there metals are: potassium, sodium, lithium, barium, strontium etc.
Determine the formula for iron l oxide
Which type of bond will most likely be found in HBr given that the electronegativity of hydrogen is 2.20 and the electronegativity of bromine is 2.96?
an ionic bond
a metallic bond
a polar covalent bond
a nonpolar covalent bond
Answer:
C. A polar covalent bond
The most likely bond found in HBr is a polar covalent bond.
What kinds of bonds exist?Ionic bond : It is formed between metals and nonmetals and the difference in their electronegativities is higher than 1.7.Metallic bond : It is formed between metals with and the difference in their electronegativities is very small.Polar covalent bond : It is formed between nonmetals and the difference in their electronegativities is between 0.4 and 1.7.Nonpolar covalent bond: It is formed between nonmetals and the difference in their electronegativities is lower than 0.4.In HBr, both H and Br are nonmetals so the bond must be covalent. The difference in their electronegativities is:
ΔE = |EN(H)-EN(Br)| = |2.20-2.96| = 0.76
The most likely bond found in HBr is a polar covalent bond.
Learn more about polar covalent bonds here: https://brainly.com/question/3978603
What is the charge of an electron?
A-negative
B-neutral
C-positive
D-none of these
what will happen an unboiled egg is placed in the beaker of fresh water and salt water
Answer:
Explanation:
1
An adult dog has less inertia than a puppy.
True
False
Answer: True
Explanation: Hopes this helps- Lily ^_^