re write the question.
Explanation:
it seems incomplete.
Will a nucleus of Zn-65 be stable or unstable?
Answer:
Unstable
Explanation:
In a lab, a scientist mixes a purple powder-like substance and a clear liquid together. The scientist observes that the two substances begin combining together, and he notices a gas begin to bubble out of the mixture. Did the scientist witness a chemical reaction? Why or why not?
The scientist witnessed a chemical reaction because a gas was evolved when the two substances were mixed.
A chemical reaction is the same as a chemical change. When a chemical change occurs, atoms recombine to form new substances. Certain occurrences may accompany a chemical reaction such as;
Change in colorEvolution of gasAppearance of a solid in an aqueous phase reactionSudden change in the temperature of the system.When the scientist mixed purple powder-like substance and a clear liquid together, he noticed that a gas began to bubble out of the mixture. This implies that new substance has been formed so a chemical reaction has taken place.
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in sublimation which state of matter is absent
sublimation is the transition of a substance directly from the solid to the state without passing through the liquid state
what is light energy
Answer:
Light energy is a form of electromagnetic radiation. Light consists of photons, which are produced when an object's atoms heat up.
Explanation:
Answer:
Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes. Light is defined as a form of electromagnetic radiation emitted by hot objects like lasers, bulbs, and the sun. Light contains photons which are minute packets of energy.
Explanation:
hope it's helpful for you.
A gas at 127 celsius and 10.0 L expands to 20.0 L. What is the new
temperature in kelvin? (You must convert to Kelvin before calculating
this problem
Answer:
800.3 Kelvin
Explanation:
127°C = 400.15 Kelvin (because 127 + 273.15)
Charles Law:
[tex]\frac{V1}{T1} = \frac{V2}{T2}[/tex] Thus, [tex]\frac{10.0 L}{400.15 K} = \frac{20.0 L}{T2}[/tex]
Then, work out the math algebraically.
T2 = 20.0 / (10.0/400.15)
= 20.0 / 0.02499...
= 800.3 Kelvin
This is assuming the pressure remains constant.
Pascal’s Law states that when pressure is applied from an outside source to a contained fluid, the force is
a. transferred through the liquid in a single direction
b. transferred through the liquid in the opposite direction
c. transferred unequally through the liquid in all directions
d. transferred equally through the liquid in all directions
Answer:
a
Explanation:
Answer:
a.....................
4. How is a lead storage battery recharged?
a. It is heated up.
b. The pressure on it is increased.
c. A direct current is applied to it.
d. A magnet is held close to it.
The pH of a solution is 8. Some hydrochloric acid is added to the solution. Suggest the pH of the solution after mixing. pH=.......??
Answer:
By adding acid to hydrogencarbonate you create a large concentration of CO2 in solution causing the solution to be highly supersaturated. This keeps the pH down as CO2 is in equilibrium with carbonic acid. During the day long mixing the excess CO2 strips off and as acid leaves the solution the pH increases.
Explanation:
Hope it helps
A solution with a pH of 8 will have its pH reduced with the addition of hydrochloric acid.
What is pH?It is the degree of acidity or alkalinity of solutions.
pH ranges from 0 to 14 with 7 being a neutral pH. Any pH below 7 is acidic while above 7 is basic.
Thus, a pH of 8 is basic and the addition of hydrochloric acid will reduce it towards 7 or even below it.
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PLSSSSSS HELPPPPPPP FAST WILL GIVE BRAINLIEST I NEED A 3 PARAGRPAH ESSAY ON THIS SCIENCE ARTICLE!! INTRODUCION BODY AND CONCLUSION EACH PARAGRAPH 5 SENTENCES OR MORE!!!!!!
Answer:
jst do the work
Explanation:
its not complicated,ask your teacher for help
can someone help w/ chem plzz
Answer:
my answer I think is tetrahedral
the number of molecules present in 0.036g of water
Answer:
5
Explanation:
How many protons, electrons, and neutrons are in calcium?
Answer:
20 protons , 20 electrons and 20 neutrons
Which have a mass of 0 amu ?
I give Brainliest!!!!
Answer:
Electrons
Explanation:
Protons and Neutrons have an amu of 1
Answer:
c. Electrons
Explanation:
Electrons are found outside the nucleus and are the lightest.
Explain why the metals conduct electricity.
Write in your own words.
Please don't copy-paste from the internet.
Answer:
Metals conduct electricity because they have free Electrons in them which helps the current to move eaisily
What are the three types of Covalent bonds? and what is the difference between them?
Help!!!
Plsss fastt
Answer:
Covalent bonds can be single, double, and triple bonds.
Explanation:
Single bonds occur when two electrons are shared and are composed of one sigma bond between the two atoms. Double bonds occur when four electrons are shared between the two atoms and consist of one sigma bond and one pi bond.
Energy that is stored is called potential energy. Take a round ball that is at rest at the top of the hill. The ball has a lot of potential energy, but no kinetic energy because it is not moving. Once the ball is released and it begins to roll, the potential energy the ball had initially is transformed into kinetic energy. The higher the ball is placed, the ____ potential energy it will have.
A-more B-less
What is the concentration of a solution containing 2.4 mol of NaCl dissolved in 3.0L of water?
Answer:
0.500 liters
Explanation:
Need Help Asap How do islands form
Explanation:
An island is formed when magma builds up and breaks the ocean's surface. In some cases, like the island of Hawaii, land masses merge together. ... For many volcanoes, formation can take thousands of years, though some volcanic islands can sometimes appear quite suddenly
Answer:
As volcanoes erupt, they build up layers of lava that may eventually break the water's surface. When the tops of the volcanoes appear above the water, an island is formed.
Explanation:
PLEASE HELP ME
Anything that has mass and takes up space is
A. Volume
B. Mass
C. Matter
Choose one option
A, B, C
Answer:
C. Matter
Explanation:
The human body has several major systems. Most body systems have multiple functions. Which of the following is NOT a major function of the musculoskeletal system?
A turning food into energy
B helping the lungs take in air
C helping the stomach digest food
D moving the bones of the skeleton
Answer:D
Explanation:
i got it right LOL
Among the given options, the one which is not a major function of musculoskeletal system is helping the lungs take in air. All others including, energy, digestion, movement of bones etc. are its function.
What are the functions of musculoskeletal system ?The musculoskeletal system in human body is composed of muscles and bones. The bones in our body are wrapped by the muscles. Muscles helps for the smooth movement of bones.
Muscles convert the chemical energy from food into kinetic energy and use it for the movement of muscles and bones. Muscles contraction needs intake of energy.
The contraction and relaxation of smooth muscles helps for the easy movement of food through the digestive track. Musculoskeletal system also helps for the movement of other organ system. Hence, option b is not the major function of this organ system.
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Petroleum is a mixture of many alkanes. The alkanes are separated and purified at oil refineries. What process decribes what happens in an oil refinery?
Answer:
Fractional distillation
Explanation:
The process of separating petroleum products into its fractions is called fractional distillation.
Fractional distillation is a method of separating a mixture of substances based on the differences in their boiling points.
Petroleum is a mixture of hydrocarbons separated in a large fractionation tower having many trays maintained at different temperatures.
As the vapor containing the petroleum mixture ascends the fractionation tower, the mixture is separated at each tray to yield the various fractions of petroleum.
If I react 4.2mol N2 with H2, how many moles of NH3 would I produce?
Answer:
first balance the reaction
n2 + 3h2 --> 2NH3
then you have your ratios
so for every mole of N2 you get 2 NH3
so 8.4mol is your answer
Explanation:
How do magnets move objects?
Answer: Magnets have a force which is known as no contact force. This force tries to attract the metallic objects near it, which makes it move.
Explanation:
Step 9: Measure Pressure and Volume with the Book and 4 kg of Weight Total the mass on the syringe. Record it in the correct row of the data table. kg
Answer:
498 g
0.498 kg
Explanation:
Answer:
4.498 kg
1.47
35.0
51.5
Explanation:
Sexual reproduction involves male and female sex cells known as ______.
Answer:
Sexual reproduction involves male and female sex cells known as - Gametes
Explanation:
In sexual reproduction new organisms are produced from the fusion of a male sex cell with a female sex cell. This fusion of gametes is called fertilisation. Sex cells are also known as gametes. Male gametes are made by male reproductive structures. Female gametes are made by female reproductive structures.
What element has the following Electron Configuration?
which of the following indicates the cathode rays has a large charge to mass ratio?
Answer:
Gggg
Explanation:
The indication of the cathode rays that has a large charge to mass ratio is there were deflected towards a positive electrode. The correct option is b.
What are cathode rays?Cathode rays are the rays that move through the negatively charged electrode the cathode charge to the positively charged electrode which is the anode charge in a vacuum tube.
These rays travel through a pipe in a straight line with speed when there is voltage is applied. They are also called electron beams. There is a cathode ray tube, CRT, which is a vacuum tube on which cathode rays travel.
So, the correct option will be for the cathode rays would be deflected towards a positive charge anode.
Therefore, the correct option is b, there were deflected towards a positive electrode.
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The question is incomplete. Your most probably complete question is given below:
They were easily deflected
There were deflected towards a positive electrode
They were deflected towards a negative electrode
They caused a fluorescent screen to glow
What is the average atomic mass of the isotopes shown in the table?
Isotope Abundance (%) Mass of Isotope (amu)
Isotope-A
54.0
17.984
Isotope-B
32.0
18.985
Isotope-C
14.0
19.982
Answer:
18.58
Explanation:
From the question given above, the following data were:
Isotope A:
Abundance of A = 54%
Mass of A = 17.984 amu
Isotope B:
Abundance of B = 32%
Mass of B = 18.985 amu
Isotope C:
Abundance of C = 14%
Mass of C = 19.982 amu
Average atomic mass =?
AVERAGE = [(Mass of A × A%)/100)] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]
AVERAGE = [(17.984 × 54%)/100] + [(18.985 × 32%)/100] + [(19.982 × 14%)/100]
= 9.71136 + 6.0752 + 2.79748
= 18.58
Therefore, the average atomic mass of the isotope is 18.58 amu
Fire ants move in to a new environment with the lizards.what will most likely happen to the lizard population over the next several years
Answer:
Some lizards in the eastern U.S. have adapted to invasive fire ants -- which can bite, sting, and kill lizards -- reversing geographical trends in behavioral and physical traits used to avoid predators. A new study describing this reversal appears online on November 29, 2018, in the journal Global Change Biology and reveals that new environmental challenges can override the historical influences that originally determined geographical trends in traits.
"Rapid environmental change, be it from changing climate or the introduction of invasive species, is putting a lot of pressure on native species," said Christopher Thawley, graduate student at Penn State at the time of the study and first author of the paper. "Usually when researchers look at how native species might respond to these kinds of threats, they might measure one characteristic of the animal and at one or a few sites. In this study, we looked at three separate characteristics of eastern fence lizards from thirteen sites spanning a thousand miles and found that these lizards are capable of adapting in a concerted way to meet the threat of invasive fire ants, and in a relatively short time frame."
Explanation:
Is hydrogen bond an attraction between polar molecules
Answer:
No because if there was an attraction hydrogen would not do it's function