What Percent of the moon is always
in daylight?
Answer: 50%
Explanation:
The best we get from the moon is a full moon, which is just half of the moon shining from the earth while the other half is in complete darkness.
Calculate the pH during the titration of 30.00 mL of 0.1000 M NaOH(aq) with 0.1000 M HCl(aq) after 18.51 mL of the acid have been added.
The pH during the titration 30.0 mL OF 0.1000 M NaOH(aq) with 0.1000 M HCl(aq) of after 18.5 mL of the acid is added is : 12.38
Calculate the pH value during the titrationFirst step : Determine the number of moles
Number of moles of NaOH = 0.1000 M * 30.00 mL = 3.0 mmol
Number of moles of HCl = 0.1000 M * 18.5 mL = 1.85 mmol
The net moles of NaOH = 3.0 mmol - 1.85 mmol = 1.15 mmol
Next step :
The total volume of the solution = 30.00 + 18.51 = 48.51 mL
[ NaOH ] = [ OH⁻ ] = net moles / total volume
= 1.15 mmol / 48.5 mL = 0.023711 M
Final step : Determine the pH value
pOH = – log[OH⁻] = – log ( 0.023711 )
= 1.625
Therefore :
pH value = 14 - pOH
= 14 - 1.625 ≈ 12.38
Hence we can conclude that The pH during the titration of after 18.5 mL of the acid is added is : 12.38
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Do they want me to tell them the materials please help need it turned in by 12:00Am
If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that.
Answer:
When the glass rod is rubbed with a silk cloth, The glass quickly loses electrons, and the silk takes the electrons out of the glass rod. So after rubbing, the glass rod becomes positively charged and the silk gets negative charge. So glass acquires a greater order than silk as electron losses.
Explanation:
What evidence in Side View lets you know that upwelling is happening in these locations?
Answer:
Image result for What evidence in Side View lets you know that upwelling is happening in these locations?
Winds blowing across the ocean surface often push water away from an area. When this occurs, water rises up from beneath the surface to replace the diverging surface water. This process is known as upwelling.
Explanation:
How does Neptune’s orbit affect its climate?
A. Its retrograde orbit creates a low troposphere.
B. Its equatorial orbit creates unpredictable storms.
C. Its circular orbit creates mild seasons.
D. Its differential orbit creates strong latitudinal winds.
Neptune’s orbit affect its climate by creating unpredictable storms.
How does Neptune’s orbit affect its climate?Neptune's orbital period is 165 years in which seasons are 40 years long. Neptune has unique and strangest weather in the entire Solar System. It has huge storms with extremely high winds.
So we can conclude that Neptune’s orbit affect its climate because equatorial orbit creates unpredictable storms.
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A rock falls from a cliff and travels downward for 6 seconds before striking the ground. How fast was the rock moving when it hits the ground? Assume there is no air resistance.
Given parameters:
duration of fall = 6s
Unknown:
Speed of the rock before it hits the ground = ?
Solution:
To solve this problem, we apply one of the appropriate motion equations;
V = u + gt
Where V is the final velocity
u is the initial velocity
t is the time taken
g is the acceleration due to gravity = 9.8m/s²
The initial velocity is 0;
So;
V = gt
Input the parameters and solve for V;
V = 9.8 x 6 = 58.8m/s
The velocity before hitting the ground is 58.8m/s
When Na, K, and Mg are arranged in increasing order of atomic radius (smallest first), which
order is correct? *
(10 Points)
A. K Mg, Na
B. Na, Mg, K
C. Na, K Mg
D. Mg, Na, K
Answer:
b) Na, Mg, K
Hope it helps you
When an atom of phosphorus becomes a phosphide ion (P3–), the radius
Answer:
increases
Explanation:
When an atom of phosphorus becomes a phosphide ion (P3–), the radius increases because 3 more electrons are added, and they placed on higher sublevels.
5.1169 mol of Ne is held at 0.9148 atm and 911 K. What is the volume of its container in liters?
By applying the Boyle's equation and substituting our given data the volume of the container was found to be 418.14 Litres
Boyle's LawGiven Data
number of moles of Ne = 5.1169 mol Pressure = 0.9148 atmTemperature = 911 KWe know that the relationship between pressure and temperature is given as
PV = nRT
R = 0.08206
Making the volume subject of formula we have
V= nRT/P
Substituting our given data to find the volume we have
V = 5.1169*0.08206*911/0.9148
V = 382.522353554/0.9148
V = 418.14 L
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CrO42-+2H+=Cr2O7^2-+H2O
A student add sodium hydroxide (NaOH) to the solution equilibrium. In 1 to 2 sentences describe and explain any changes to the solution that the student will observe.
Addition of NaOH will cause the equilibrium position to move to the left because of the removal of the hydrogen ions.
Equilibrium position
When changes in temperature, pressure or concentration is imposed on a reaction system in equilibrium, the system will readjust itself in order to annul the change.
This change occur when the equilibrium position is moved to the left or right. For the reaction, CrO4^2-+ 2H^+ ⇄ Cr2O7^2- + H2O, addition of NaOH will cause the equilibrium position to move to the left because of the removal of the hydrogen ions.
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Table sugar is a element or mixture
Answer: Element
Explanation: Table sugar, or sucrose, is not a mixture. It is a compound. Let me start with a pure substance and work up from there. Elements are pure substances because they cannot be broken down any more.
Answer:
I would guess a element
Explanation:
a rock weighing 26.0 is placed in a graduated cylender displacing the volume from 13.2ml to 25.3ml what is the density in g/cm3
Answer:
m=26.0 g
v₁=13.2 mL
v₂=23.5 mL
p=m/(v₂-v₁)
P=26.0/(23.5-13.2)=2.524 g/cm³
Explanation:
hope this helps!
have a good day!
The color and temperature of stars are closely related. Which color star is the hottest?
Use the drop-down menus to identify which of these stars is the smallest, which is the largest, and which is in the middle.
Answer:
blue star is the hottest of all
Explanation:
Blue stars are blue because of the temperature of their surface and they are so hot because they are much more massive than cooler stars like our sun.
Compare the appearance of the water in the pot with that of the water in the plastic bowl. What do you notice? Next, taste the water in the plastic bowl. Compare the taste with the sample of water you tasted earlier from the pot. Does the water taste similar or different? Explain.
Taste and colour of water is different in both pot and plastic bowl.
Comparison between water in pot and plastic bowlThe appearance of the water in the pot is different from that of the water in the plastic bowl because of the colour. We know that water adopt the colour of the container in which it has been kept.
The taste of water in the pot is somewhat sweeter and colder than water present in the pot due to presence of pores and composition of pot so we can conclude that taste and colour of water is different in both pot and plastic bowl.
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Answer: The water in the pot is fully red because it is being heated the color is spreading more and the water in the pot is clear because condensation leaves the color and salt behind. The water in the plastic bowl taste more like regular water it does not have a taste but the water in the pot has a biterness taste to it.
Explanation:
50 POINTS AND BRAINLIEST!
How do I make a graph for this? Below are the parts of my lab. Please help! Its overdue! The part i need help with is on the third page, highlighted in yellow
Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body.[2][8] These contrast with benign tumors, which do not spread.[8] Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in bowel movements.[1] While these symptoms may indicate cancer, they can also have other causes.[1] Over 100 types of cancers affect humans.[8]
Tobacco use is the cause of about 22% of cancer deaths.[2] Another 10% are due to obesity, poor diet, lack of physical activity or excessive drinking of alcohol.[2][9][10] Other factors include certain infections, exposure to ionizing radiation, and environmental pollutants.[3] In the developing world, 15% of cancers are due to infections such as Helicobacter pylori, hepatitis B, hepatitis C, human papillomavirus infection, Epstein–Barr virus and human immunodeficiency virus (HIV).[2] These factors act, at least partly, by changing the genes of a cell.[11] Typically, many genetic changes are required before cancer develops.[11] Approximately 5–10% of cancers are due to inherited genetic defects.[12] Cancer can be detected by certain signs and symptoms or screening tests.[2] It is then typically further investigated by medical imaging and confirmed by biopsy.[13]
Answer:
Graph is attached below.
Explanation:
Go to insert, then chart, then select line, then go to sheets and edit it to fit what you need it to say.
Hope this helps! Please let me know if you need more help, or if you think my answer is incorrect. Brainliest would be MUCH appreciated. Have a great day!
−xXheyoXx
18 sep analyze and interpret data the table shows several ionic solids, their average
bond energies in electron volts (ev), and their melting points. use the pattern
indicated in the table to predict the average bond energy of calcium fluoride (caf2
), which has a melting point of 1420°c.
The bond energy is the energy that must be supplied to break the bond. Ionic substances are held together by strong bonds.
What is bond energy?This question is incomplete but I will try to explain what is meant by average bond energy as the tables are missing.
The average bond energy of a bond simply means the energy that is stored in that bond as it holds two atoms together. It is equal to the energy that must be supplied to break the bond. The numerical value of the bond energy can not be deduced as the data is missing.
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Some1 please answer these questions in stuck
the reactions at the cathode:
1. the reduced active metal is water, other than that the metal will be reduced
2. H⁺ of the acid will be reduced
the reactions at the anode:
1. if the electrodes are not inert then the metal is oxidized
2. If inert then:
a. OH⁻ from the base will be oxidized
b. The halogen metal will oxidize
1. HCl
H⁺ of the acid will be reduced
Cathode: 2H⁺(aq) + 2e⁻ ⇒ H₂(g)
The halogen metal will oxidize
Anode: 2Cl⁻(aq) ⇒ Cl₂(g) + 2e⁻
2. NaNO₃
Na : active metal, water reduced
Cathode: 2H₂O + 2e ⇒ 2OH- + H₂
NO₃: oxyacid, water will be oxidized
Anode: 2H₂O ⇒ 4 H + + O₂ + 4e
3. CuCl
Cu : not active metal
Cathode: Cu²⁺ (aq) + 2e ⇒ Cu (s)
Cl : The halogen metal will oxidize
Anode: 2Cl⁻ (aq) ⇒ Cl₂ (g) + 2e
what would be the volume in ML
Answer:
Explanation:
720 ml
Answer:
720 ml
Explanation:
a SOV
What is the opposite process to melting?
What is opposite process to melting?
Answer:
solidification
Explanation:
Which of the following is the most violent of all solar disturbances?
a
solar winds
b
sunspots
c
prominence's
d
solar flares
what mass of nacl is in 2.5L of 0.207M solution?
Describe 3 ways rocks make our lives easier?
Answer:
Geology in everyday life is not restricted to resources. It is also about hazards and risk associated with rock falls, radon, landslides, quick clay, landslides and earthquakes. Geology is detective work. Geology helps us understand climate change in the past, which may help us predict future scenarios.
Explanation:
We have that for the Question "describe 3 ways rocks make our lives easier?" it can be said that 3 ways rocks make our lives easier is
MetalsChalk(inscriptions)Jewelry
From the question we are told
Describe 3 ways rocks make our lives easier?
Generally
There are many ways that rocks help us a human every day but these as very distinnctive 3
MetalsMetals are made from rocks,Rocks are melted and used to make metals using
variant method
Chalk(inscriptions)Rocks have for the longest time helped us in representation of words and letter,inscriptions in general over the years
JewelryRocks are the source of the worlds most renounced jeweries as the beauty are priced highly
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What is A,B and C in the following picture?
Answer:
A= Coconut oil, B= Water, C= Sea water
Explanation:
oil is dense, water will allow things to float, but not as well as sea water
What is a characteristic of straight chained alkanes?
●They have one or more rings of carbon atoms.
●They have carbon atoms that are double-bonded to other carbon atoms. ● They have more than two carbons that are bonded to only one other carbon. ●They have carbons bonded in a single row from one end of the molecule to the other end of the molecule.
Answer:
● They have more than two carbons that are bonded to only one other
Explanation:
They have carbons bonded in a single row from one end of the molecule to the other end of the molecule. ... The straight-chain alkane has two more hydrogen atoms than the cycloalkane
Answer:
D. They have carbons bonded in a single row from one end of the molecule to the other end of the molecule.
Explanation:
I got it wrong when I chose C - They have more than two carbons that are bonded to only one other carbon. So yeah p.s UNUS ANNUS
HNO3(aq)+H2S(s)> Ss)+ NO(g)+H2O(l)
Answer: Nitric acid + Hydrogen disulfide
Explanation: To balance HNO3 + H2S = NO + S + H2O you'll need to be sure to count all of atoms on each side of the chemical equation.
Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Nitric acid + Hydrogen disulfide .
Important tips for balancing chemical equations:
Only change the numbers in front of compounds (the coefficients).
Never change the numbers after atoms (the subscripts).
The number of each atom on both sides of the equation must be the same for the equation to be balanced.
How many unpaired electrons does each element have?
Carbon : ______________________
Oxygen : ______________________
Sulfur : ________________________
Answer:
Carbon has 2 unpaired electrons
Oxygen has 2 unpaired electrons
Sulfur has 2 unpaired electrons
Explanation:
What was the original meaning of the term oxidation.
Answer:
reaction with oxygen
Explanation:
The term oxidation was originally used to describe reactions in which an element combines with oxygen.
Match the correct type of energy transfer that takes place.
Answer:
Lightbulb: electrical energy to light energy
Alarm Clock: electrical energy to sound energy
Rollercoaster: electrical energy to mechanical energy
Riding a Bike: chemical energy to mechanical energy
Explanation:
Light bulbs, alarm clocks, and roller coasters require electrical energy to work. This energy then changes into the subsequent types. Light bulbs primarily emit that energy in the form of light, alarm clocks change that energy into sound, and roller coasters begin to move (mechanical). People power bikes, and the energy in our body is stored as chemical energy. So, when we rides bikes, that energy gets turned into moving (mechanical) energy.
An atom can be called a particle, but a molecule is never called a particle.
Answer:
Atoms are composed of particles called protons, electrons and neutrons. ... A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. Protons and neutrons are both composed of other particles called quarks and gluons.
Particles can be atoms, molecules or ions. The term molecule is often used incorrectly to refer to any type of chemical compound. A molecule is a neutral particle made of two or more atoms bonded together. Take care with your own language, especially when referring to compounds formed during chemical reactions.