Answer:
C
Explanation:
An atom of gold with 79 protons, 79 Electrons and 118 neutrons would have a mass number of 197 gold. Therefore, option C is correct.
What is mass number ?The total number of protons and neutrons in an atomic nucleus is known as the mass number, often known as the atomic mass number or nucleon number. In atomic mass units, it is roughly equivalent to the atom's atomic mass.
Because it indicates the mass of the entire number of protons and neutrons in an element, the mass number of an element is so named. The atomic number and atomic mass of an element are typically listed in periodic tables along with the chemical symbols for each element.
The third element in the periodic table's eleventh column is gold. It is under the transition metal category. The most common isotope of gold has 118 neutrons and 79 protons together with 79 electrons.
Thus, option C is correct.
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If three different samples of a liquid have different compositions, then the liquid can be classified as *
A.) an element
B.) a mixture
C.) a substance
D.) a compound
According to the forces of attraction, if three different samples of a liquid have different compositions, then the liquid can be classified as a mixture.
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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Does listening to music when you study increase your test scores? What is the independent variable?
listening to music or not
studying or not
test scores
No answer text provided
I NEED THIS ASAP
Answer:
It can you just have to find a song that get's stuck in your head and try replacing the studing answer with the song because then the answer will get stuck in your head.
Explanation:
Answer: It really depends on not only what you are listening to but how you tend to react to different sounds. I would say if you get side tracked easy, don't play music that has lyrics or animation and if you get headaches or annoyed easy play music that's softer. It really depends of how you are as a person
Explanation:
this is the portion of the electromagnetic spectrum that has a frequency just below the visible spectrum. (For number 8, the one that is highlighted.)
Answer:
these are very difficult dear
Explanation:
HELP ITS DUE TOMORROW
Would’ve been easier to find this if u put the question on title
Answer:
1. 2 H2O + O2
2. NaBr + CaF2 = NaF + CaBr2
3.Ag + O2 = Ag2O
Explanation:
I hope this helps~~~
Which scenario bellow BEST illustrates the law of inertia ?
How small are the microorganisms that live on and in the human body? Answer it in at least 1 paragraph
Answer: The human body contains trillions of microorganisms — dwarfing human cells by 10 to 1. Due to their little size, nonetheless, microorganisms make up just around 1 to 3 percent of the weight's (in a 200-pound grown-up, that is 2 to 6 pounds of microscopic organisms), yet assume a crucial function in human wellbeing. In 2016, a survey of over forty years of examination into the human microbiome found that there is zero logical proof to back this frequently refered to tidbit up. Rather, the proportion appears to be about 1.3-to-1, with the normal human playing host to around 100 trillion microorganisms, plus or minus. Rather, the proportion seems to be about 1.3-to-1, with the normal human playing host to around 100 trillion organisms, plus or minus.
Explanation:
You can mix this up and paraphrase this into ur own words.
The microorganisms that are present and live in the human body are 1 to 10 micrometers.
What are microorganisms?
Microorganisms are tiny living organisms that can be only seen by microscopes. These organisms are found everywhere on earth. They are free-living and parasitic. There are good and bad microorganisms.
Some are useful to the earth and the living creature, but some are harmful to the health of other living creatures. They are responsible for many diseases in plants, animals, and other organisms.
There are many bacteria present inside the body. They are present in the digestive system, and our mouth. They help in the digestion and breakdown of many food materials and macromolecules.
Thus, the size of microorganisms that are present and live in the human body is 1 to 10 micrometers.
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For the equation 3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O, how many units of NO3 are represented on the products side?
Answer: 6
Explanation:
Answer:
C or 6
Explanation:
Which of the following would indicate the formation of a new substance?
A. A liquid turns to a solid
B. A sample of metal melts
C.Bubbles and fizzing occur
D. A solid dissolves in a liquid
According to the concept of chemical changes, occurrence of bubbles and fizz indicate the formation of a new substance.
What are chemical changes?
Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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Mitochondria are very important to the cell and are sometimes called the powerhouses of the cell. Imagine that a certain virus penetrates a cell and reaches the mitochondria. Predict what would happen to the cell if the virus were able to destroy all of the cell's mitochondria.
A. The cell would eventually die without the ATP that it needs for activities
B. The cell would be unaffected by the loss of mitochondria and will continue to function normally
C. The cell would rapidly produce more proteins
D . The cell would multiple uncontrollably because there is nothing to stop it anymore.
Answer:
b
Explanation:
Q3. A bridge is built without expansion gaps.
Explain what could happen to the bridge if the temperature became:
a) much hotter than the day it was built.
b) much colder than the day it was built.
P.s. (this is not a select option question, explain each according to the question)
Answer:
b bc its gonna fill up wit cold air and freeze
Explanatio
What is most likely to occur during a chemical reaction?
a Molecules of the original substance are lost. b New atoms are created. c The original substance maintains its properties. d Mass is conserved.
During a chemical reaction, the most likely occurring is mass conservation. According to law of conservation of mass, total mass in a reaction is conserved.
What is law of conservation of mass?According to the law of conservation of mass, the total mass in a chemical reaction or in a physical change is conserved. Simply, mass is neither created nor destroyed.
When a chemical reaction takes place, no new atoms are created and the properties of the reactant species cannot be maintained after reaction.
Molecules of any reactant is not lost during a reaction. The total mass in the reactant side of a balanced reaction will be equal to the total mass in product side.
Therefore, the mass conservation is likely to occur during a chemical reaction. Thus, option d is correct.
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PLEASE HELP
I'll give brainliest if you can solve and explain how you got it.
Answer:
8m/s
Explanation:
First you add the force of newtons which is 320 N of force then divide it by the weight which is 40kg. 320/40=8
You throw a ball so that it hits the floor a few feet in front of you. Will it bounce back to you? Explain how the bounce is similar to the way light behaves?
Answer: No. The ball wil not bouce back to you. A ball is similar to how light behaves because when you bounce a ball, it will go in a straight line and when it hits something, it will bouse again and go somewhere else. This is also how light behaves.
Explanation:
The ball will not bounce back to you. It will bounce again but go somewhere else similar to the way light behaves.
What is the scattering of light?When a beam of light travels through a medium, it hits the particles in them. Some of the light rays get absorbed while a few rays get scattered in various directions. The intensity of the scattered light depends on the size of the particle and its wavelength.
When light reaches matter, it can be refracted, reflected, absorbed, or scattered. Light travels in the same direction after hitting the surface is reflected light since the surface is smooth but never follows the same path.
Scattering happens when light bounces off an object or particle in a variety of directions. A ball shows behavior as light. When you bounce a ball, it follows a straight path and hits something, it will bounce again but in a different direction. That is how the light behaves.
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Help RRLY EASY I JUST DONT UNDERSTAND
Answer:
boomer
Explanation:
HELP ITS DUE TOMORROW
A scientist is using a microscope to observe a type of (prokaryote) bacteria. Which 2 structures would the scientist most likely see?
Group of answer choices
DNA and cell wall
golgi body and vacuole
endoplasmic reticulum and DNA
vacuole and nucleus
Answer:
sooo, golgi body and vacuole
Explanation:
Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid.
im pretty sure im right im like a chemistry type of person so i hoppe im right
hope this helped :P
If you ate a bite of Whataburger, how would it travel through your digestive system?
Laura and Jess observed two points, P and Q, on a number line. A number line is shown from negative 2 to positive 2 with increments of 2 over 8. A point P is shown at the fifth tick mark to the left of 0, and a point Q is shown at the fifth tick mark to the right of 0. Jess said that the absolute values of the numbers represented by the two points are different. Laura said that the absolute values of the numbers represented by the two points are the same. Which of the following explains who is correct?
Jess, because the points are of different signs
Jess, because the points are at different locations
Laura, because the distance between the two points is 10 over 8 units
Laura, because each of the two points is 10 over 8 units from 0
Answer:
P is 5 ticks to the left of 0, so it would be -5/8
Q is 5 ticks to the right of 0, so it would be at 5/8
an absolute value turns a negative number into a positive number
so absolute value of P located at -5/8 = 5/8
this is the location of point Q
Jimmy said that the absolute values of the numbers represented by the two points are the same.
so Jimmy is correct
Explanation:
Why are gamma rays not affected by a magnet as they pass over it?
a) Gamma rays do not have enough mass to be affected.
b)Gamma rays do not have the right electrical charge to be affected.
c) Gamma rays are composed of only energy.
d) Gamma rays move too fast for anything to affect their pathway.
I think it's B
I hope I helped
what is the coeiffecent in the following 6H2O
What is the role of an electron in an atom
Answer:
Negative Charged Particle
Explanation:
Electrons are really small compared to everything else in the atom
Electrons give negative charge to the atom, and it balances out the positive charge given by the protons. That's the role of an electron!
Hope this helps!
1. Why is severe weather associated with low pressure systems?
2. Why is sunny weather associated with high pressure systems?
plz answer quick due in 10 min
Use the chemical reaction to answer the question.
NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2
A student mixes baking soda (NaHCO3) and acetic acid (HC2H3O2) to produce a chemical reaction shown. Which statement about the reaction is correct?
(10 point)
The atoms of the reactants are regrouped during the reaction.
Some atoms gain mass after the reaction.
There are more H atoms after the reaction.
Atoms of Na are destroyed during the reaction.
During a chemical reaction, no atoms are destroyed or created. The change occurred in the given reaction is the regrouping of atoms of the reactants.
What is a chemical change?A change by which a bond between two atoms is created or breaks called chemical changes. All chemical and biological reactions are example of chemical changes.
According to law of conservation of mass proposed by Antoine Lavoisier mass is neither created nor destroyed. Thus the total mass in a reaction is conserved.
The mass in reactant side must be equal to the mass in the product side in a balanced reaction. Thus no atoms crated or destroyed.
Therefore, option A is correct, that is atoms are regrouped between reactants during a reaction to get new products with same mass as that in product side.
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What can you use to get rid of paint A. thinner B. water C. Soda. D. cough medicine
Answer:
You can remove paint with everything but cough medicine.
Explanation:
the ____ temperature of an object the lower its thermal energy
Thermal energy is the average sum of all kinetic energy of all the molecules of gases. The lower the temperature of an object the lower its thermal energy.
What is Thermal energy?
Thermal energy is a energy which is possess by a moving object. It is directly proportional to kinetic energy of the molecules. It is very difficult to find the correct value of kinetic energy so we find average kinetic energy. Which is very easy to calculate as compared to calculating kinetic energy.
Mathematically,
K.E=2/3KT
Where,
K= Boltzmann constant
T is the temperature
Average kinetic energy is directly proportional to temperature. It is not dependent on the type of gases or mass of gases. The lower the temperature of an object the lower its thermal energy.
Therefore, the lower the temperature of an object the lower its thermal energy.
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Give an example, other than making ice-cream or a slushy, where the effect of salt on the phase change of water is useful in everyday life.
ASAP PLS AND THANK YOU
Answer:
Putting salt on the ground to melt ice or snow I mean.
Explanation:
Help pleaseeeeeeeeeeeeee!!?
Answer:
There are 146 neutrons in Uranium-238
There are 90 electrons in Thorium-234
Carlos is using the following images of a coal plant and a barbecue for his science investigation about chemical energy. Based on his observations, which statement most likely describes the conclusion of his investigation?
a coal plant
a barbecue
The images show examples of chemical energy being converted into heat and electrical energy.
The images show examples of mechanical energy being converted to heat energy.
The power plant and the barbecue convert electrical energy into chemical energy.
The power plant and the barbecue store heat energy and convert it to chemical and electrical energy.
I believe it is the first one, please correct me if I'm wrong.
Answer:
A
Explanation:
Describe how the composition of the upper mantle is different from the lower mantle? The upper mantle is made of solid rocks and lower mantle is made of melted rocks and minerals The upper mantle is made of melted rocks and minerals and lower mantle is made of solid rocks The upper mantle is made of lava and the lower mantle is made of magma
Answer: The upper and lower mantle have very few differences but the lower mantle is more solid than the upper mantle.
Answer:
The upper and lower mantle differ from each other in location, temperature and pressure.
The upper mantle is made of melted rocks and minerals and lower mantle is made of solid rocks
PLEASE HELP!!! I WILL GIVE BRAINLIEST TO 1ST PERSON!!!
A balloon filled with gas has a mass of 5 g. If the balloon is heated the mass of the balloon will:
--
A.) remain 5g
B.) decrease
C.) increase
Answer:
I believe the answer would be A, remain 5g because heating the balloon would increase the speed of the gas molecules, but not necessarily change the amount
Answer:
decrease
Explanation:
The ballon will most likely pop causing it to decrease in mass.