Answer:
3.82 × 10 ^-23 g
Explanation:
6.02 x 10^23atoms = 1 mole of sodium
1 atom = 1/(6.02 x 10^23) mole
mass = mole × molar mass
= 1/(6.02 x 10^23) × 23
= 3.82 × 10 ^-23 g
Which of the elements shown has an atomic mass of 20 amu?
A) A
B) B
C) C
D) D
The elements shown have an atomic mass of 20 amu is Neon.
What is atomic mass?
The atomic number of an atom is its total number of protons and neutrons.
Neon has an atomic mass of about 20 this isotope contains 10 protons and 10 neutrons.
Actually, Neon would be listed as having an atomic mass of about 20.18 because of a mixture of isotopes.
Z= Atomic number the number of protons in the nucleus which defines the element.
In this case, Z=10 and this means neon but there are also 10 neurons in the nucleus of the major isotope which gives it 20Ne.
Hence, option D is the correct answer.
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Which element is a noble gas? pls help!!
Answer:
HE (helium)
Explanation:
Answer: Helium
Explanation: If you look at a periodic table noble gasses are on the far right side
What is the freezing point of solution that has 185.25 grams of Ca(OH)2 (formula mass = 74.1) dissolved in 2,500 grams of water at standard pressure?
Answer:
The freezing point depression ∆T = KF·m where KF is the molal freezing point depression constant and m is the molality of the solute. Rearrangement gives: mol solute = (m) x (kg solvent) where kg of solvent is the mass of the solvent (lauric acid) in the mixture. This gives the moles of the solute.
Explanation:
Does this help at all??
While both comets and asteroids are found to orbit the Sun in our Solar System, which choice correctly explains how they are different?
Comets are much larger than asteroids.
Asteroids form a tail, and comets do not.
Asteroids have long orbits around the Sun. Comets orbit between Mars and Jupiter.
Comets are made of ice, dust, and rocky material. Asteroids are made of rock and metal material.
Answer:Comets are made of ice,dust,and rocky material.Asteroids are made of rock and metal material
Answer:
D
i think
Explanation:
How many grams of Sn will be created when 114 grams of SnO2 react with excess H2? SnO2 + H2 ->Sn + H2O
I
Explanation:
CNN vfbtgnynynynynyuybunujy
Can someone pls help me?
Answer:
17
Explanation:
what is the independent variable
how do we make our natural resources last for generations to come?
Answer:
We can use non-plastic water bottles, use reusable ziploc bags, use a felt grocery bag, fill a bucket of water while you are showering then afterwards use it to water plants.
this all can help because it is our reusable and the plastic things can end up in the ocean (ocean/ water is a natural resource).
In which scenario is the object in equilibrium?
A
the rope being pulled
B
the book on the table
С
the weight being lifted
D
the car gaining speed
Answer:
d i believe
Explanation:
Answer:
It's 100% B, The book on the table.
Explanation:
Explain in your own words. What does DNA mean?
Answer:
DNA aka deoxyribonucleic acid is a molecule in cells that holds genetic information. Their main job is to tell the cell what type of protein to make. The other instructions they hold for the organism is instructions on how to develop, survive and reproduce.
Explanation:
DNA is the genetic material made of two polynucleotide chains that coil around one another to create a double helix is called deoxyribonucleic acid (DNA).
All known organisms and many viruses have genetic information in the polymer that is necessary for their development, operation, growth, and reproduction. Nucleic acids include ribonucleic acid and DNA.
DNA is the genetic material found inside bodily cells that contribute to an individual's unique genetic makeup. Similar to the game's code or a home's blueprints, it contains the directions for creating the body.
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The period of time needed for a radioisotope to lose one-half of its activity is known as that isotopes
Explanation:
The radioactive scattering technique is called radioactive degradation. For each radioactive isotope, the natural radioactive cycle is special and is determined by a period of time termed a half-life. One half-life was its time needed to experience radioactivity for half of both the radioactive nuclei.
What is Geothermal energy? How does it work? (2-3 sentences is good enough) thx :3
WILL MARK BRAINLIEST WHOEVER ANSWERS THIS FIRST:DDD!!!
Answer:
Geothermal power plants, which use heat from deep inside the Earth to generate steam to make electricity. Geothermal heat pumps, which tap into heat close to the Earth's surface to heat water or provide heat for buildings
Explanation:
What is one energy transformation that is taking place in the photo?
radiant energy to thermal energy
thermal energy to nuclear energy
chemical energy to thermal energy
radiant energy to chemical energy
Answer:
Radiant energy to chemical energy
Explanation:
Got it right on edge 2021
One energy transformation that is taking place in the photosynthesis process is radiant energy to chemical energy.
What is energy transformation?Energy transformation is the process in which one form of energy converted into another form of energy.
What is photosynthesis process?Photosynthesis process is defined as the process in which plants makes their own food by using the carbon dioxide, water and sunlight in the chlorophyll.
The balanced chemical equation of photosynthesis process is
6CO2 + 6H2O → C6H12O6 + 6O2.
Since, it have 6 atoms of carbon, 12 atoms of hydrogen and 18 atoms of oxygen on both side. So, it is balanced.
Since, sunlight which it take is in the form of radiant and convert it into chemical energy.
Thus, we concluded that the energy transformation that is taking place in the photosynthesis process is radiant energy to chemical energy.
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Please help me i really need help
Answer:
H2o i think
Explanation:
The ion which forms from element 36 is known as
A. Krypton ion
B. Kryptonite
C. kryptonide ion
D. this ion does not exist
HELP!
A train travels 102 miles in 2 5/6 hours. What is its average speed in miles per hour?
Answer:
36miles/hour
Explanation:
speed =distance÷time taken
102miles/2 5/6
102÷17/6
102×6/17
=36miles per hour
David pushes the wall to the left with his finger. The
wall pushes David to the right. What is the action
force and what is the reaction force?
Answer:
push or pull
Explanation:
2.107 × 10^24 calculate the number of moles
What is the compound name for Bel?
What is the molarity of a solution if 0.529 moles of LiCl is dissolved in 687 mL of water?
Answer:
Molarity of solution = 0.77 (Approx.)
Explanation:
Given:
Moles of LiCl = 0.529
Volume of water = 687
Find:
Molarity of solution
Computation:
Molarity of solution = [Moles/Volume]1000
Molarity of solution = [0.529/687]1000
Molarity of solution = 0.77 (Approx.)
What is the charge of the oxygen ion when it has a filled outermost energy level?
A. 2+
B. 2-
C. 1-
D. 1+
Name four elements that are similar to Iodine.
Answer:
Chlorine, astatine, bromine, and fluorine.
Answer:
Fluorine, Chlorine, Bromine, and Astatine
Explanation:
they are all in group 17 meaning they have similer chemical properties.
Pls help me its due in 20 minutes.
Answer:
11. 1, 4.5
12. right; 4.5 > 1
13. 10, 3
14. left; 10 > 3
Explanation:
All you're being asked to do is count the squares in the pictures.
11. The number of squares for the left wave from bottom to top is 2, so the amplitude is 1/2 that, 2/2 = 1. For the right wave it is 9 squares from bottom to top, so the amplitude is 9/2 = 4.5.
left amplitude: 1, right amplitude: 4.5
__
12. The right wave has greater amplitude. Evidence: 4.5 > 1. It also takes up more vertical space in the picture.
__
13. It is difficult to determine the wavelength of the left wave, because two full peaks are not shown. If we try to match corresponding points, they appear to be about 10 squares apart.
The right wave has 2 peaks in 6 squares, so about 3 squares between peaks.
left: wavelength 10, right: wavelength 3
__
14. The left wave has greater wavelength. Evidence: 10 > 3.
Answer:
11. 1, 4.5
12. right; 4.5 > 1
13. 10, 3
14. left; 10 > 3
Explanation:
What happens to the decaying proton during positron emission?
Answer:
Turns into a neutron and a gamma ray and a positron are released.
Explanation:
Chemical bonds form because: a. The atoms have more energy bonded together than separated b. The atoms have less energy bonded together than separated
Answer:
A. The atoms have more energy together than separated.
Explanation:
There are several reasons why a chemical bond could take place. Adding things like heat or pressure stimulate the atoms to force a reaction to take place. But when it comes down to it, the intramolecular forces of the electrons pull each other to form chemical bonds (represented by Valence electrons). The stronger these are, the more likely they are going to bond.
Atoms with lower forces typically don't typically bond with other atoms of lower forces.
The three properties of objects are:
Answer:
they have shape.
they have volume.
they occupy space.
help pleaseeeeeeeeee
How are the cells produced through mitosis and meiosis different?
A.
They have different cell shapes.
B.
They have different numbers of chromosomes.
C.
They have different levels of activity in the ribosomes.
D.
They have different components in the cell membrane.
Answer:
c.
They have different levels of activity in the ribosomes.
Answer: B. Mitosis produces two genetically identical daughter cells but meiosis produces four genetically different daughter cells.
Explanation:
Mitosis is the equational division in which two identical daughter cells are formed.Mitosis does not involve crossing over of the homologous chromosomes.It occurs in four steps which are:ProphaseMetaphaseAnaphaseTelophaseMeiosis is reductional division in which four different daughter cells are formed.It proceed through two cycles i.e meiosis I and meiosis IIMeiosis I contains:Prophase I which contains:I HOPE THIS IS HELPFUL HAVE A AWESOME NIGHT/DAY❤️✨how do i word a formal letter to a teacher saying i didn't pay attention during the science lessons and i now have no idea what to do? by the way, this is on edge so i haven't been on a call, or met my teacher in person.
Explanation:
Hello mr/mrs (name) I unfortunately couldn't pay attention to the class due to some issues I had therefore I don't know what we are doing in class
OR
Hello mr/mrs (name) I could understand what we were doing in class I would like it if you could break it down more or explain better to me
OR just say something it had something to do with your internet such as
Hello mr/mrs (name) I didn't understand what you were saying during our class due to some of my internet issues I was have throughout the day. I hope you can explain what we did during the class.
Those may be some of my excuses I've used before
they have worked for me:)
I don't know if that helped?:/
How many particles are present in a 56.9 mole sample of calcium hydroxide?
Answer:
Particles? Calcium hydroxide does not exist as discrete molecules, but as a network solid. The only way you would have separate particles, is if the calcium hydroxide was dissolved in a boatload of water. Ca(OH)2 is not all that soluble in water. Nonetheless, assume a lot of water, enough to dissolve 56.9 moles.
Ca(OH)2 --> Ca2+ + 2OH-
56.9 moles Ca(OH)3 x (3 moles ions / 1 mol Ca(OH)2) = 170.7 mol ions
==================
Percent composition of CuNO3......molar mass = 125.5 g/mol
Cu.... 1 x 63.5 / 125.5 x 100 = 50.6% Cu
N ......1 x 14.0 / 125.5 x 100 = 11.2% N
O .....3 x 16.0 / 125.5 x 100 = 38.2% O
(hope this helps can i plz have brainlist :D hehe)
Explanation:
What is a chemical symbol? Give an example.
Answer:
zero two is bae
Explanation:
How many protons and neutrons are in an atom of B-13?
Answer:
6 protons and neutrons
Explanation: