An arrangement of electrons that tells us how many total electrons are in an atom or ion as well as the outermost is called Electronic configuration.
What is electronic configuration?Electronic configuration is the arrangements of electrons in the orbitals of an atoms and this shows the total number of atoms present in the atoms orbits and it shows the different energy levels around an atomic nucleus.
Therefore, An arrangement of electrons that tells us how many total electrons are in an atom or ion as well as the outermost is called Electronic configuration.
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If the difference in electronegativity between atoms of differnt non-metals is small, the atoms of the two non-
metals will most likely-
Answer:
Form covalent bond
Explanation:
If their electronegativity is same or very close they will likely form covalent bond (where they share electrons)
Which of the following is true for a chemical reaction at equilibrium?
Answer:
youre gonna have to include the answers for me to help
Explanation:
How can glass be a liquid if it's so hard?
Answer:
It is an amorphous solid and hence also called pseudo solid. So it flows very slowly over thousands of years. It is not visible to the n*ked eye.
13. List the following ions in order of increasing radius: Li+, Mg2+, Br"
14. Write Lewis structures for the following:
A. HNNH
B. PC13
Ç. NO-
Answer:
The answer would be B, PC13
Explanation:
Answer:
B: PC13
Explanation:
A calorimeter holds 50 g water at 22.0°C. A sample of hot iron is added to the water. The final temperature of the water and iron is 28.0°C. What is the change in enthalpy associated with the change in the water’s temperature?
Note: The specific heat of water is 4.18 J/°C
Use the formula ΔH = - cmΔT
The change in enthalpy associated with the change in the water’s temperature is 1254 J.
What is specific heat?The amount of heat required to increase the temperature of one gram of a substance by one Celsius degree is known as specific heat.
Enthalpy change will be calculated as:
ΔH = -cmΔT, where
m = mass of water = 50g
c = specific heat of water = 4.18J/g°C
ΔT = change in temperature = 28 - 22 = 6 °C
On putting values in the above equation, we get
ΔH = -(4.18)(50)(6) = -1254 J
Hence change in enthalpy of the reaction is -1254 J.
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I) Choose The Correct Answer 1. Which of the following statement correctly describes the law of conservation of mass? A/ It states that the total mass of reactants is equals with the total mass of products in all chemical reaction B/ The total numbers of atoms at the left should be equal with the total numbers of atoms at the right side of arrow C/Atom is neither created nor destroyed in any chemical reaction D/ All E/ None
Answer:
D all
Explanation:
because law of conservation of mass describes A, B and C statement
ITS DUEEE brainliest+15 points place plastic wrap infrony of a flashlight what do you observe? after that place wax paper in front of the flashlight Does the waxed paper affect how the light hits the paper on the wall? Explain your response.
Plastic wrap is transparent and so nearly all light passes through easily ,
Wax Paper is translucent and so light is blurred or scattered .
What is Reflection ?
Reflection of light occurs when light hits a smooth surface that does not absorb any of the light but instead bounces it back off the surface.
A mirror is flat, smooth, and polished. When light hits a mirror it is not absorbed but is reflected off at a very predictable angle.
The angle that the light hits the mirror is called the angle of incidence.
The angle of light that bounces off the mirror is called the angle of reflection.
The Law of Reflection states that the angle of incidence is equal to the angle of reflection.
Plastic wrap is transparent and so nearly all light passes through easily ,
Wax Paper is translucent and so light is blurred or scattered .
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i need the second question asap please
Answer:
Running to catch the bus would be it
Explanation:
because you're running for the others you barly move
What volume is occupied by a 0.118 mol of helium gas at a pressure of 0.97 atm and a temperature of 305 K ? Would the volume be different if the gas was argon (under the same conditions) ?
Answer:
See below
Explanation:
PV = n RT R = .082057 L - Atm / (K-Mole)
.97 V = .118 (.082057)(305)
V = 3.04 liters
Will not change for argon.....will be the same for all ideal gases
Calculate the molar mass of the following:
1. HCI
2. ZnF2
3. K2CO3
4. FePO4
5. Cu2s
Show all your work please thank you
Answer:
1. 36.5g 2. 103.3g
3. 140g 4. 151g
5. 159g
Explanation:
1. HCl
atomic mass of H= 1g
atomic mass of Cl = 35.5g
solution:
HCl
= 1+ 35.5
= 36.5g
2. ZnF2
atomic mass of Zn = 65.3g
atomic mass of F = 19g
solution:
ZnF2
= 65.3 + 2(19)
=65.3 + 38
= 103.3 g
3. K2CO3
atomic mass of K= 40g
atomic mass of C = 12g
atomic mass of O = 16g
Solution:
K2CO3
= 2(40) + 12 + 3 (16)
= 80 + 12 + 48
= 140g
4. FePO4
atomic mass of Fe = 56g
atomic mass of P= 31 g
atomic mass of O = 16g
solution:
FePO4
= 56 + 31 + 4 (16)
= 56 + 31 + 64
= 151g
5. Cu2S
atomic mass of Cu = 63.5g
atomic mass of S = 32 g
solution
Cu2S
= 2(63.5 )+ 32
= 127 + 32
=159g
What is the meteorology tool that is an area where weather data is collected from various sources to make predictions
Answer:
Weather maps im sorry im not sure but i think its the answer
Which experiment led to the idea that atoms contained a nucleus?
O A. Niels Bohr's photoelectric effect experiment
O B. Ernest Rutherford's gold foil experiment
O C. J. J. Thomson's cathode ray experiment
O D. Robert Millikan's oil drop experiment
Answer:
B. Ernest Rutherford's gold foil experiment
Explanation:
That experiment showed a space with the tiny dense spot, referred to as the nucleus. The experiment involved shooting alpha particles (helium nuclei) at a very thin sheet of gold and then observing.
8 marks (a) Given the following information: AH = -116 kJ AH = -256 kJ Eqn. 1: Eqn. 2: 2NO(g) + O2(g) 2NO2(g) 2N2(g) + 502(g) + 2H2O(C) ► 4HNO3(aq) N2(g) + O2(g) → 2NO(g) AH = +183 kJ Eqn. 3: Use Hess's Law to calculate the enthalpy change for the reaction below (Show your working) AHrın = ??? 3NO2(g) + H2O(l) → 2HNO3(aq) + NO(g) AHHO
Enthalpy change is the heat that evolved or got absorbed in a reaction mixture. The enthalpy change for the reaction is -137 kJ.
What is Hess's law?Hess's law states that the enthalpy for the whole reaction will be equal to the summation of all changes that are independent of the steps of the reaction.
First, arrange all the reactions and balance them, first the data of equation 1 is rearranged:
NO₂ must be on the reactant side and must be multiplied by 3/2 so that 3 moles of NO are balanced.
3 NO₂ (g) → 3 NO (g) + 3/2 O₂ (g), ΔH = + 174 kJ
Now, for equation 2: the moles of HNO₃ required is 2 so the whole equation will be divided by 2 as,
N₂ (g) + 5/2 O₂ (g) + H₂O (l) → 2HNO₃ (aq), Δ H = -128 kJ
Now, for equation 3: N₂ and O₂ should be eliminated and reversed as,
2NO (g) → N₂(g) + O₂(g) ΔH = -183 kJ
Now, to determine the enthalpy the rearranged equation 1, 2, and 3 are added to get the final equation:
3NO₂ (g) + H₂O (l) → 2HNO₃ (aq) + NO (g)
Δ H = 174 - 128 - 183
= -137 kJ
Therefore, -137 kJ is the enthalpy change.
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Fresh whole milk containing 3.5% fat was separated using a centrifuge into cream with 50% fat and skim milk with 0.4% fat what will be the proportion of skim milk to cream
Answer:
For 1hour whole milk feed = (60,000 /6 )Kg=10,000Kg
So that the flow rate of whole milk feed = 10,000 kg/hr
Mass of whole milk=10,000 kg
Mass of cream = x kg Mass of skim milk=(1-x) Mass balance equation is Whole milk= skim milk + cream 10,000kg=skim milk + x kg So, skim milk = (10,000-x) kg Material balance on fat is 10,000kg×0.04 = (10,000-x)×0.004 + x On solving the above equation we get the value of x So, x=361.44 kg So that the flow rate of cream = x= 361.44kg/hr and mass of skim milk= (10,000-x)=(10,000-361.44)kg = 9,638.56 kg So that the flow rate of skim milk = 9,638.56 kg/hr. for checking
(Whole milk) flow rate = (skim milk + cream) flow rate
10,000 kg/hr = (9,638.56 + 361.44) kg/hr 10,000 kg/hr = 10,000 kg/hr Hence it is proved.
2. The figure shows the phase transition of water. Use it to answer question:
C°
120°
5
s/
4
100°
80°
60°
3
40°
20°
2
0°
71
-10°
During which period(s) of time is water in the liquid phase?
A 2
B 2 and 3
C 3
D D 3 and 4
Why does the shape of the moon appear to change over the course of about a month? (2 points)
Group of answer choices
The sun is always lighting up the same amount of the moon.
The sun is lighting up different amounts of the moon.
The moon changes sh
Answer:
The sun is lighting up different amounts of the moon.
Explanation:
Which of the following are examples of useful hydrocarbons?
Answer:
the most useful hydrocarbon is fuel.
Explanation:
some examples like: natural gases,coal,diesel fuel, kerosene etc.
The most useful hydrocarbon is fuel like gasoline, natural gas, fuel oil, diesel, jet fuel, coal, kerosene, and propane.
What are hydrocarbons ?The term hydrocarbon is defined as the compound which is made up of hydrogen and carbon. They are useful as energy sources. Hydrocarbons are examples of group 14 hydrides.
There are four types of hydrocarbon that are alkanes, alkenes, alkynes and aromatic hydrocarbons.
Among the most widely used hydrocarbon fuels include gasoline, natural gas, fuel oil, diesel, jet fuel, coal, kerosene, and propane. Plastics and synthetic fabrics like polyester are made using hydrocarbons as well.
Thus, The most useful hydrocarbon is fuel like gasoline, natural gas, fuel oil, diesel, jet fuel, coal, kerosene, and propane.
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Why do scientists use stirbars in the laboratory?
Answer:
A stir bar consists of a magnetic bar used to agitate a liquid mixture or solution
Explanation:
ILL GIVE A BRAINLY IF YALL ANSWER THIS THANKS
This tree species was preserved as a fossil in the Arizona desert. The species is now extinct. Describe what the environment was like when the tree lived and how it is different now. Then, infer why this type of tree and other living things that lived with it are extinct.
Answer:
Anstree species was preserved as a fossil in the Arizona desert. The species is now extinct. its because we preserved it right so that mean even to it fell down its still alive for the simple reason that we dint ruin it
Solve 21 and 22 please
Answer:
try youre best to succsess
Magnesuim Bromide is a (an) _____ compound.
Answer:What type of compound is Magnesium bromide?
Magnesium bromide (MgBr2) is a chemical compound of magnesium and bromine that is white and deliquescent. It is often used as a mild sedative and as an anticonvulsant for treatment of nervous disorders. It is water-soluble and somewhat soluble in alcohol.
Explanation:
25 Which statement best describes how energy can be harmful?
A A fire burns down a house.
B Electricity heats an oven.
C A lamp lights a house.
D An alarm clock wakes up a sleeping person.
26 The diagram below shows four boxes labeled A, B, C, and D. The mass of
each box is shown.
550 A
grams
5
grams
50
grams
700 p
grams
Which box is under the box with a mass of 50 grams?
A box A
B box B
Cbox C
D box D
(OVER)
Grade Science - June 19
20
1) The statement "A fire burns down a house" best describes how energy can be harmful. Option (A) is correct.
2) Among the four boxes, Box D has the highest mass of 700 grams. Option (D) is correct.
3) Among the given boxes, Box C is the one with a mass of 50 grams.
Option (B) is correct.
1) In this scenario, the energy in the form of heat from the fire is released uncontrollably, leading to the destruction of the house. Fire represents a potentially dangerous and destructive form of energy when it is not properly contained or controlled. It illustrates how energy, when harnessed inappropriately or unintentionally, can have harmful consequences, causing damage to property and posing a risk to human safety.
2) This means Box D is the heaviest compared to the other boxes labeled A, B, and C. The mass of each box is shown in the diagram, with Box A weighing 550 grams, Box B 5 grams, and Box C 50 grams. Box D, with 700 grams, has the most significant mass, making it the heaviest box in the set.
3) Since the question asks which box is "under" the box with a mass of 50 grams, we can refer to the diagram and see that Box C is positioned above Box D and Box B. Therefore, the only box that is under Box C is Box A. So, the answer is Box A, as it is positioned below Box C in the diagram.
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The complete question is:
1. Which statement best describes how energy can be harmful?
A A fire burns down a house.
B Electricity heats an oven.
C A lamp lights a house.
D An alarm clock wakes up a sleeping person.
2. The diagram below shows four boxes labeled A, B, C, and D. The mass of
each box is shown.
a) 550 grams
b) 5 grams
c) 50 grams
d) 700 grams
3. Which box is under the box with a mass of 50 grams?
a) box A
b) box B
c) box C
d) box D
What is the concentration of OH- of a solution with an H3O+ concentration equal to 6.31 E-7 M?
[OH⁻] = 0.158 x 10 ⁻⁷ M is the concentration of OH- of a solution with an H3O⁺ concentration equal to 6.31 x 10 ⁻⁷ M.
What is pH scale ?The letters pH stand for the power of the hydrogen ion. The pH of a solution is the negative logarithm of the hydrogen-ion concentration.
pH = - [log H⁺]
[tex]\rm [H^{+}] [OH^{-}] = 1 \times 10^{-14}[/tex]
[tex]\rm[OH^{-}] = \dfrac{1 \times 10^{-14} }{ [H^{+}] }[/tex]
[tex]\rm[OH^{-}] = \dfrac{1 \times 10^{-14} }{ 6.31 \times 10^{-7} }[/tex]
[OH⁻] = 0.158 x 10 ⁻⁷ M
Therefore [OH⁻] = 0.158 x 10 ⁻⁷ M is the concentration of OH- of a solution with an H3O+ concentration equal to 6.31 x 10 ⁻⁷ M.
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2. Which principle of green chemistry is illustrated by the following scenario?
Chemical company ABC wants to save money. It decides to change its chemical processes to a method that creates fewer waste products which have to
be treated before disposal.
A.)Prevention
B.)The solution to pollution is dilution
C.)Out of sight, out of mind
D.)Less
hazardous
chemical synthesis
Answer:
C
Explanation:
are sedimentary rocks formed weathering erosion and deposition?
Answer:
yes
Explanation:
sedimentary rocks are erosion, weathering, dissolution, precipitation, and lithification
Sedimentary Rocks are layers of deposited dust,smaller rocks & particles. This means that yes Sedimentary rocks are formed from weathering,erosion & deposition.
I HOPE THIS HELPS <3 and good luck!
Chemicals are classified as health hazards when they pose which of the following hazardous effects?
Answer:
poisoning, breathing problems, skin rashes, allergic reactions, allergic sensitisation, cancer, and other health problems from exposure.
Explanation:
many hazardous chemicals are also classified as dangerous goods.
What is pH defined as?
Answer:
pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.
Explanation:
hope this helps if not let me know have a great day
What strand of mRNA would be produced from the strand of DNA shown
below?
GCT AAG
• A. GCA UUG
•
B. CGA TTC
C. CGA UUC
• D. GCT AAG
CGA UUC are the strands of mRNA that would be produced from the strand of DNA shown. Therefore, the correct option is option C.
What is DNA?Deoxyribonucleic acid, or DNA, is an organic molecule with a complex molecular structure which is present in all cells, both prokaryotic and eukaryotic, as well as in a variety of viruses. For the transfer of inherited traits, DNA codes genetic information. The discovery significantly improved scientists' knowledge of DNA replication including the genetic regulation of biological processes.
Despite the fact that the molecule DNA was initially identified in 1869, its significance for the transmission of genes was not demonstrated till 1943. James Watson with Francis Crick discovered that the molecular makeup of DNA consists of a double-helix polymers, a spiral made up of two DNA strands twisted around one another, in 1953 with the help of biophysicists Rosa Lind Franklin with Maurice Wilkins. CGA UUC are the strands of mRNA that would be produced from the strand of DNA shown.
Therefore, the correct option is option C.
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What does the shape of the moon we see depend on? (2 points)
Group of answer choices
The position of the moon during its orbit around Earth
The position of the moon during its orbit around Jupiter
The position of the moon during its orbit around Mars
The position of the moon during its orbit around Saturn
Answer:
The position of the moon during its orbit around Earth.
Explanation:
2.) At what temperature in Celsius will a 1.0g sample of neon gas exert a pressure of 500 torr in a 5.01 L container. (Hint: use the Ideal Gas Law)
The required temperature of the sample of gas is 823K.
What is ideal gas equation?Ideal gas equation gives idea about the behavior of gas at different condition & represented as:
PV = nRT, where
P = pressure = 500 torr = 0.657 atmV = volume = 5.01 LR = universal gas constant = 0.082 L.atm / K.molT = temperature = ?n = molesMoles will be calculated as:
n = W/M, where
Moles of Neon gas = 1g / 20.1g/mol = 0.049 mole
On putting all these values in the above equation, we get
T = (0.657)(5.01) / (0.049)(0.082) = 822.8 = 823 K
Hence required temperature of the sample is 823 K.
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