Answer:
It vaporizes.
Explanation:
When a substance absorbs heat energy and doesn't increase its temperature, that means it's going through a change of phase.
The next change of phase for a liquid is turning to a gas, so it vaporizes.
How many moles of NaOH
would you have in a
sample that weighed 10g?
Answer: There are 0.25 moles of NaOH in a sample that weighed 10g.
Explanation:
Given: Mass of NaOH = 10 g
Molar mass of NaOH is 40 g/mol.
Number of moles is the mass of substance divided by its molar mass.
Therefore, moles of NaOH are calculated as follows.
[tex]No. of moles = \frac{mass}{molarmass}\\= \frac{10g}{40 g/mol}\\= 0.25 mol[/tex]
Thus, we can conclude that there are 0.25 moles of NaOH in a sample that weighed 10g.
Students set up an experiment to investigate whether or not a chemical
reaction has occurred when mixing an antacid tablet with water. The results
are listed in the table. Which is not evidence that a chemical reaction has
occurred? *
Answer:
open system
Explanation:
it needs to loose mass not gain mass
what will litmus paper turn when it reacts with sodium nitrate?
Where on the periodic table are you most likely to find elements that do not react with other elements A) group 1 B) group 2 C) group 17 D) group 18
Answer:
d) group 18
Explanation:
Group 18 on the periodic table consists of noble gasses, which do not chemically interact with other elements.
The solid dissolves quickly is a chemical or physical reaction
Answer:
i think it is chemical wait no physical
Explanation:
6)
Which formula can represent
an
alkyne?
A)
C₃H6
B)
C₂H4
C)
C3H4
D)
C₂H6
Answer:
c)C3H4
Explanation:
Answer: C. C3H4
Explanation:
I got it wrong and castle learning showed me the answer
Calculate the pOH for a solution with a pH of 12.34. Is the Solution acidic or basic?
Answer:
1.66 basic
Explanation:
Select the correct answer.
A circuit is used in which process?
OA. electricity
OB. magnetism
OC. velocity
OD. gravity
Answer:
electricity
Explanation:
A circuit is used in every electrical and electronics operation.
How many moles of Co are needed to produce nine moles of CO2
Answer:
guizzes
Explanation:
guizlet
Answer:
2. 8 moles of carbon dioxide can be produced from 12.5 moles of oxygen. 1 mole of octane can be produced from 8 moles of carbon dioxide gas.
Explanation:
hope this helps :)
cells, Cell Division)
1. Which of the following statements is NOT part of the cell theory?
a. Cells are the basic unit of structure and function in living things
b. All cells are produced from other cells.
C. Only animals are composed of cells.
d. All living things are composed of cells.
Answer:
c is wrong
Explanation:
How much heat, in kilojoules, is needed to raise the temperature of 236 g of silver from 8.5oC to 34.9 °C? (cAg = 0.24 J/g°C)
Answer:
1.49kJ
Explanation:
Using the formula as follows;
Q = m × c × ∆T
Where;
Q = amount of heat (joules)
m = mass (g)
c = specific heat of silver (J/g°C)
∆T = change in temperature (°C)
According to the information given in this question;
mass of Silver (Ag) = 236g
c of Ag = 0.24 J/g°C
initial temperature (T1) = 8.5°C
final temperature (T2) = 34.9°C
∆T = T2 - T1 = 34.9 - 8.5 = 26.4°C
Using Q = m × c × ∆T
Q = 236 × 0.24 × 26.4
Q = 1,495.3 Joules
Amount of heat needed to raise the temperature of Silver (Q) in kilojoules is 1495.3/1000 = 1.4953
Q = 1.49kJ
A student was in the lab testing the conductivity of different solutions. Three of the solutions were NaNO3, Ca(NO3)2, and Al(NO3)3. Which of the solutions should be the best conductor of electricity?
Answer:
Aluminium nitrate
Explanation:
[tex]Al(NO _{3}) _{3}[/tex]
This is because there are many conducting nitrate ions compared to the other electrolytes
what is bank?Effect of drug abuse.
- Long term effects
Chronic drug use can alter a person’s brain structure and function, resulting in long-term psychological effects, such as: depression, anxiety, panic disorders, increased aggression, paranoia, hallucinations.
- Cardiovascular disease
Stimulants, such as cocaine and methamphetamines, can damage the heart and blood vessels. The long-term use of these drugs can lead to coronary artery disease, arrhythmia, and heart attack.
- Respiratory problems
Drugs that people smoke or inhale can damage the respiratory system and lead to chronic respiratory infections and diseases. Opioids slow a person’s breathing by binding to specific receptors in the central nervous system that regulate respiration. By depressing a person’s respiration, these drugs can lead to slow breathing or heavy snoring.
- Kidney damage
The kidneys filter excess minerals and waste products from the blood. Heroin, ketamine, and synthetic cannabinoids can cause kidney damage or kidney failure.
- Liver disease
Chronic drug and alcohol use can damage the liver cells, leading to inflammation, scarring, and even liver failure.
- Overdose
Taking too much of a drug or taking multiple drugs together can result in an overdose. According to the Centers for Disease Control and Prevention (CDC), drug overdose caused 67,367 deathsTrusted Source in the United States in 2018. Opioids contributed to nearly 70% of these deaths.
How to get help:
Finding the right treatment program can be a daunting task. Here are a few things to think about when seeking treatment for drug abuse, misuse, or addiction:
consider whether inpatient or outpatient services would be the best fit
find local treatment centers using this resource from the Substance Abuse and Mental Health Services Administration
note that state-run treatment centers and programs can be free of charge
look for programs that use evidence-based treatment strategies
Two glass rods are rubbed together. One of the glass rods are brought near (but
does not touch) an uncharged pith ball. Would you expect the pith ball to attract,
repel, or do nothing? Explain why.
Answer:
Do Nothing
Explanation:
Charges are transferred by friction when two different types of bodies are rubbed together. This is known as charging by friction.
However, when two materials of the same type are rubbed together, no charge is transferred from one object to the other hence there is no transfer of charges by friction and none of the two glass rods are charged.
Therefore, when one of the glass rods is brought close but does not touch the pith ball, nothing happens.
On the basis of electronegativity differences between atoms, which of the following scientific claims is the most accurate regarding the bonding in Mg(NO3)2(8) ?
A) There is polar covalent bonding between Mg atoms and N atoms.
B) There is polar covalent bonding between Mg atoms and O atoms.
C) There is ionic bonding between N5+ ions and O2- ions.
D) There is ionic bonding between Mg2+ ions and NO3- ions.
There is ionic bonding between Mg²⁺ ions and NO₃⁻ ions. A Further explanation is below.
Ionic bonding seems to be a form of interaction wherein the cationic as well as unpaired electrons are powerfully electrostatically connected.
Throughout the general view, the ionic bonding occurs between someone metal/nonmetal owing to their large electro(-) discrepancy, while bond formation occurs between nonmetals due to the relatively low electro(-) gap.Even though there are metals as well as non-metals, the relative electronegativity differential between (Mg²⁺) and (NO₃⁻) however is large.Thus the above response i.e., option D) is correct.
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need these 2 answered asap pls
Answer:
im not a brain wiz but i think 20
Explanation:
Which features are created by groundwater erosion and deposition? Check all that apply. stalagmites sinkholes rills stalactites gullies rivers
Answer:
Stalagmites
Sinkholes
Stalacites
Explanation:
These features are created because the ground water dissolves solid rocks and move the solid rocks, dissolve solutions beneath the ground water gradually and therefore enlarging the cracks, which eventually form a cave. Ground water carries minerals which are then deposited and can form stalagmites or stalactites. If a stalactite and stalagmite combine together, they usually form a column.
Answer:
a,b,d
Explanation:
join monkee kind ditch humanity :D
As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution?
A) Decreases
B) Increases
C) Remains the same
B) increasesAnswer:
Explanation:
As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution increases. Therefore, the correct option is option B.
What is mole?The World System representing Units (SI) uses a mole (symbol mol) as the unit of material amount. How many fundamental entities of a particular substance are present in an object and sample is determined by the quantity of that material. An elementary entity can be a single atom, a molecule, a pair of ions, an ion pair, even a subatomic particle like a proton depending on the makeup of the substance.
For instance, although having differing volumes and masses, ten molecules of liquid (a chemical compound) because 10 moles of mercurial (a chemical element) both have the same quantity of substance, because the mercury has exactly one atom every every molecular structure of the water. As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution.
Therefore, the correct option is option B.
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Which of these has a bond that takes the most energy to break?
a) Brz
b) N,
c) 02
d) HCI
Answer:
Hello! Your answer would be, D) HCI
Explanation:
Hope I helped! Ask me anything if you have any questions. Brainiest plz!♥ Hope you make a 100%. Have a nice morning! -Amelia♥
how many atoms are present in 14 g of iron
Answer:
1.51 × 10²³ atoms
Explanation:
First, we convert 14g of iron (Fe) to moles using the formula below:
mole = mass ÷ molar mass
Molar mass of Fe = 55.85g/mol
mole = 14g ÷ 55.85g/mol
mole = 0.251mol
The number of atoms in 0.251 mol of Fe is calculated as follows:
number of atoms = n × nA
Where;
n = number of moles
nA = Avagadros number (6.02 × 10²³)
number of atoms = 0.251 × 6.02 × 10²³
number of atoms = 1.51 × 10²³ atoms.
PLZ HELP!!!!!! IN YOUR OWN WORDS PLZ! :D
Imagine your cell phone rings. Describe how the sound gets transmitted from your phone to your ear, and then, from your ear to your brain. In your response, be sure to mention the type of wave that a sound wave is, the medium the sound is transmitted through before it gets to your ear, and what happens in your ear once the sound reaches it.
Answer:
SOUND WAVE (carried by thin metal inside the phone) ⇒ELECTRICAL ENERGY (over the wire) ⇒SOUND WAVE (that is heard by someone on the side of the phone)
Explanation:
What is a sound wave?A wave that is comprised of compression and refraction, by which sound is propagated in an elastic medium such as air.
How does sound get transmitted from phone to ear?
The sound waves are carried to a thin metal disk inside the phone, known as the diaphragm, and are converted into electrical energy. The electrical energy travels over wires to another phone and is converted from electrical energy to sound waves again which can be heard by the one on the other end of the phone.
How does sound get transmitted from ear to brain and what happens when sound reaches the ear?Sound waves enter the outer ear and travel through a small passageway (ear canal), which leads to the eardrum.The eardrum vibrates from the coming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are known as the malleus, incus, and stapes.The bones present in the middle ear amplify the sound vibrations and send these vibrations to the cochlea (the snail-shaped structure that is filled with fluid present in the inner ear). An elastic separation runs from the beginning to the edge of the cochlea, splitting it into upper and lower parts. This separation is called the basilar membrane as it serves as the base on which key hearing structures sit.Once the vibrations result in the fluid inside the cochlea rippling, a traveling wave appears along the basilar membrane. Hair cells (sensory cells) sitting on top of the basilar membrane ride the wave. Hair cells near the broad end of the cochlea detect higher-pitched sounds. Those closer to the center detect lower-pitched sounds, such as a large dog barking.As the hair cells move up and down, microscopic hair-like projections (known as stereocilia) that perch on the peak of the hair cells crash against an overlying structure and bend down. Bending results in pore-like channels, which are at the tips of the stereocilia, opening up. Then chemicals rush into the cells, producing an electrical signal.The auditory nerve carries this electrical signal to the brain, which in return it into a sound that we recognize and understand.In this way, sound reaches our ears.
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How much energy is required to change 75 grams of copper at 35 degrees Celsius
to liquid copper at 1200 degrees C?
34950 J of energy is required to change 75 grams of copper at 35 degrees Celsius to liquid copper at 1200 degrees Celsius.
What is Specific Heat?The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.
It is given by the formula -
Q = mcΔT
where, Q = amount of heat
m = mass
c = specific heat
ΔT = Change in temperature
Given,
Mass of copper = 75g
ΔT = ( 1200 - 35) = 1165⁰C
c = 0.4 J/g ⁰C
Q = mcΔT
= 75 × 0.4 × 1165
= 34950 J
Therefore, 34950 J of energy is required to change 75 grams of copper at 35 degrees Celsius to liquid copper at 1200 degrees Celsius.
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PLS HELP ASAP NO LINKS
What type of scientist studies matter and its composition?
Biologist
Chemist
Physicist
Engineer
Answer:
.biology and maybe physics
Answer:
Biologist
ExplanationBiologist Unlike the above type of scientist, geoscientists’ work involves exploring the earth and its internal environment. They study the composition, structure, and processes of the earth by being indoors and outdoors. They contribute to the discovery of mines, petroleum deposits, minerals, and other aspects of the earth.
calculate the mass in 0.0040 moles of potassium permanganate
For the equation 3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O, how many units of NO3 are represented on the products side?
I never learned what parentheses mean in chemical reactions
Well anyway no assumptions and no links
Answer:
6
Explanation:
3 * 2 =6
6) What is the picture below an example of?
Answer:
The picture below is an example of a food chain.
Explanation:
The bug (can't tell which one by the picture) eats the grass, the frog eats the bug, the snake eats the frog, and the eagle eats the snake.
If 500 mL expandable cylinder with a pressure of 500
mmHg was filled until the volume was 1.2 atm. What is the
new volume?
Answer:
0.274 L
Explanation:
Applying Boyle's law,
PV = P'V'................. Equation 1
Where P = Initial pressure, V = Initial volume, P' = Final pressure, V' = Final volume.
make V' the subject of the equation,
V' = PV/P'............. Equation 2
From the question,
Given: P = 500 mm Hg, V = 500 mL = 0.5 L, P' = 1.2 atm = 912 mm Hg
Substitute these values into equation 2
V' = (0.5×500)/912
V' = 0.274 L
Hence the new volume is 0.274 L
Beryllium hydrogen carbonate is more than 3% hydrogen by mass.
True
False
What is important in order for a radioisotope to provide accurate dating
results?
O A. The half-life should be similar to the age of the object.
B. The radioisotope cannot be part of a decay chain.
O C. The isotope must undergo transmutation.
O D. The item being dated must be very old.
The most important factor to be considered in order for a radioisotope to provide accurate dating simply is:
The half-life should be similar to the age of the object.
The correct answer choice is option a.
Why half-life should be similar to the age of the object in determining accurate dating of a radioisotope.Half-life of radioisotope helps in determining dating accurately simply because it helps to predict the amount of radioactive substance remaining after a given period of time.
In conclusion, it can be perfectly deduced from the explanation given above that the half-life of a radioisotope usually, frequently and most of the time helps to determine the rate at which these substances decay.
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En una muestra de jugo de limón la concentración de H1 es de 3.8x10 a la 4 potencia ¿ cual es su PH considerando que 378= 0.58
Answer:
pH = 3.42
Explanation:
Para calcular el pH necesitamos usar la siguiente expresión:
pH = -log[H⁺]
Por tanto, solo necesitamos reemplazar el valor dado de [H⁺] en la expresión anterior y se determina su pH:
pH = -log(3.8x10⁻⁴)
pH = 3.42Por tanto el pH de la muestra de jugo de limón es 3.42