The question is incomplete; the complete question is:
Recall all the atomic models you described in task 1. think about the results...
Recall all the atomic models you described in task 1. think about the results each model would predict for rutherford’s gold foil experiment. which atomic models does rutherford’s experimental evidence support? explain why these models are compatible with the experimental results.
the models in task 1 were dalton's, thomson's, rutherford's, and bohr's.
Answer:
Bohr's
Explanation:
Rutherford's theory laid the foundation upon which Bohr's model is founded. Rutherford established the fact that at the center of the atom, there is a nucleus whose radius is smaller than the radius of the atom. This nucleus is positively charged and most of the mass of the atom is concentrated there. Electrons move round this nucleus in orbits.
The experimental evidences of the Bohr's model shows that Rutherford's model was fundamentally correct. However, Bohr's model introduced the idea of quantization of the energy of electrons in an atom. The model went further to explain the spectra lines of the hydrogen atom.
how many atoms are in SH2O4 ?
Answer:
≈0.56 moles or ≈3.37⋅ 10 23 atoms
Explanation:
An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom?
A. 39
B. 20
C. 58
D. 19
Answer:
A. 39
Explanation:
Mass number= #protons + #neutrons
19+20= 39
Taking into account the definition of mass number, the correct option is the option A: the atomic mass of the atom is 39.
First of all, all atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them. Protons are positively charged, neutrons are neutrally charged, and electrons are negatively charged (electrons).
On the other hand, the mass number tells us the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus:
Mass number = (number of protons) + (number of neutrons)
It is represented by the letter A.
In this case:
number of protons= 19number of neutrons= 20So:
Mass number = 19 + 20
Solving:
Mass number= 39
In summary, the correct option is the option A: the atomic mass of the atom is 39.
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https://brainly.com/question/11837355?referrer=searchResultshttps://brainly.com/question/1758023What is the BEST scientific definition of the term “force”?
Answer:
Any unapposed interaction that will change the motion of an object.
Explanation:
My physics teacher had us write this down last week.
This is a very long thing, Answer any of the questions that you can please anything helps just make sure you put the numbers for the questions you answer:
Question 1: Laws of Conservation of Matter and Energy (2 points)
a. Law of conservation of matter (1 point)
i. What does the law say about matter?
ii. What about matter can change and what does not change, according to the law?
b. Law of conservation of energy (1 point)
i. What does the law say about energy?
ii. What about energy can change and what does not change, according to the law?
Question 2: Phases of Matter (2 points)
a. What are the four states, or phases, of matter? Describe the shape and volume properties of each phase. Can they change, or are they fixed? (1 point)
i. _______________________
Shape:
Volume:
ii. _______________________
Shape:
Volume:
iii. _______________________
Shape:
Volume:
iv. _______________________
Shape:
Volume:
b. When heat energy is absorbed by matter, the matter's temperature increases. When heat energy is released by matter, the matter's temperature decreases. The matter can also change from one phase to another when heat energy is absorbed or released. Identify whether matter absorbs heat or releases heat as each of the following phase changes occur. (1 point)
i. From solid to liquid (melting)
ii. From liquid to solid (freezing or hardening)
iii. From liquid to gas (evaporation)
iv. From gas to liquid (condensation)
Question 3: Types of Energy (4 points)
a. List four kinds of energy. Give a brief definition of each. (1 point)
i. ______________________________________________________________
ii. ______________________________________________________________
iii. ______________________________________________________________
iv. ______________________________________________________________
b. Energy can change from one form to another. Describe the energy conversions in the following scenes. (1 point)
i. A kid falling out of a tree
ii. A scout rubbing sticks together to start a fire
iii. A man running a kerosene heater
c. What is the equation for calculating gravitational potential energy on the Earth? (1 point)
d. What is the equation for calculating kinetic energy (1 point)
Matter cannot be created or destroyed.
Further explanationConservation of mass applies to a closed system, where the masses before and after the reaction are the same
Or
Conservation of mass means:
In a closed/isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.
So what changes is the form, into a liquid, gas or solid
while what does not change is the mass
When liquid water boils the distance between the particles increases
Answer:
If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid.
The distance between the particles increases tremendously the attraction doesn't change.
What occurs to the water particles whilst water boils?
Whilst water is boiled, the heat energy is transferred to the molecules of water, which begin to pass extra quickly. ultimately, the molecules have an excessive amount of power to stay connected as a liquid. while this takes place, they shape gaseous molecules of water vapor, which go with the flow to the floor as bubbles and tour into the air.
Does the space among particles increase when heated?On heating, their kinetic electricity pushes neighboring atoms or molecules other than each different. This pushing of atoms or molecules outcomes in a slightly accelerated distance among molecules and the volume of stable additionally increases.
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In my closet, I have 5 black shirts, 6 brown shirts, 3 light blue shirts, 5 white shirts, 2 green
shirts, 4 navy blue shirts. What is the total number of shirts?
Explanation:
i think if you add them all the total is 26
Answer:
25 shirts
Explanation:
5+6=11+3=14+5=19+2=21+4=25 (if u dont understand how I wrote that then) 5+6=11, 3+5=8, 2+4=6
11+8=19, 19+6=25
A student accidentally left a bottle of ammonia unclosed in the corner of a laboratory
After a few minutes the entire laboratory smelled of ammonia.
Which process has occurred?
A
Brownian motion
B
Diffusion
с
Evaporation
D
Distillation
Answer:
Evaporation
Explanation:
because the ammonia is left unclosed
The smell of ammonia has been spread from a corner to entire room by the process of diffusion. Thus, option B is correct.
Ammonia has been the liquid compound with the formula [tex]\rm NH_4[/tex]. It has a pungent smell. Ammonia has been used in several synthesis reactions, and in various industrial processes.
The diffusion has been the process of transfer of molecules from higher concentration to lower concentration. The smell of ammonia has been spread in the entire laboratory from a corner.
The ammonia molecules in the bottle are at higher concentration while there has been lower concentration of ammonia in the environment. With the process of diffusion there has been the transfer of ammonia molecules in the environment.
Thus, diffusion has been responsible for spreading the smell of ammonia in the laboratory from a corner. Thus, option B is correct.
For more information about diffusion, refer to the link:
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What causes a static charge
Answer:
Separating or rubbing materials.
Explanation:
Static electricity occurs when positive (+) or negative (−) electrical charges collect on an object's surface. There are several ways this condition can be caused.
What should you wear during lab investigations to protect your eyes?
Answer:
goggles
Explanation:
Plz help! The best answer will be marked as brainliest!
Make a funny sentence of alloys for Magnesium
Here is an example for Mercury, it HAS to for Magnesium
“I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon”
Answer:
Sometimes the whole alloy in a uniform is a solid solution
10. How many protons, neutrons, and electrons are present in the
140 +3
Ce ion?
Name: Cerium
Symbol: Ce
Atomic Number: 58
Atomic Mass: 140.116 amu
Number of Protons/Electrons: 58
Number of Neutrons: 82
What changes in trade did Europeans hope to bring about by finding sea routes to Asian markets?
PLEASE ANSWER THIS WUICK PLEASEEEE
Answer:
controlled by the Arabs, who brought frankincense and myrrh by camel caravan from South Arabia.
5
Calculate the mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL.
7
Calcule la masa de un líquido con una densidad de 2.5 g/mL y un volumen de 15 mL.
A. 375 g
B. 3.75 g
C. 37.5 g
Answer:
The answer is option CExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume of liquid = 15 mL
density = 2.5 g/mL
We have
mass = 15 × 2.5
We have the final answer as
37.5 gHope this helps you
Compared to gases liquids can be easily compressed. True or false?
Answer:
true
Explanation:
Answer: false, gases can be more easily compressed than liquids.
Explanation: They're easier to compress because there's much more empty space between the gas particles.
3. Two or more substances that are not
chemically combined...
Element
Mixture
Compound
Answer:
Its a mixture.
How many moles of zinc are in 12.044 X 10^26 zinc atoms
Explanation:
Explanation:
The problem basically wants you to find a way to convert between the number of atoms present in the sample and the number of moles they are equivalent to.
To convert between atoms and moles we use something called Avogadro's constant, which basically acts as the definition of a mole.
More specifically, in order to have one mole of an element you need 6.022⋅1023 atoms of that element. You can thus use this number as a conversion factor to take you from atoms to moles or vice versa.
In your case, you will have
1. John travels from the United States to Australia for the winter, but when he gets there it feels more like summer. Why?
Answer:
In Australia, it's warmer than most of the United States during winter.
Explanation:
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the
reaction?
O The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the
products.
O The law of conservation of energy indicates the same amount of carbon will be found in the reactants as in the
products,
The law of conservation of mass indicates the same amount of glucose will be found in the reactants as in the
products.
The law of conservation of energy indicates the same amount of glucose will be found in the reactants as in the
products.
Answer:
A
Explanation:
Question:
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the reaction?
Options:
The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products. The law of conservation of energy indicates the same amount of carbon will be found in the reactants as in the products. The law of conservation of mass indicates the same amount of glucose will be found in the reactants as in the products. The law of conservation of energy indicates the same amount of glucose will be found in the reactants as in the products.Answer:
A.) The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products.
Explanation:
I just did the test on edge 2020 and got it right!
Sodium easily combines with chorine is reactivity
answer
yes
Explanation:
Could someone please tell show me steps to solve this, I am so confused.
9.80 grams of magnesium metal react with excess hydrochloric acid, and 29.8 grams of magnesium chloride are produced
by the reaction. What is the percent yield of this reaction?
Mg + HCI –> MgCl2 + H2
And this is y I should of paid attention in that one science class in middle school that taught this...
(￣▽￣;)
Which describes any compound that has at least one element from group 17?
How is heat transferred when a person steps on hot sand?
O A. From the sand to the feet
O B. In both directions between the sand and the feet
C. From the feet to the sand
O D. Heat is not transferred.
Answer:
Explanation:
Heat moves from hot sand to the bottoms of your feet by conduction. Conduction is the transfer of heat between objects that touch each other.
Heat moves from hot sand to the bottoms of your feet by conduction.Hence Option (A) is correct.
What is Conduction ?Heat conduction is a phenomenon that occurs through the interaction of neighbouring atoms and molecules, transferring their energy/heat (partially) to their neighbours.
This is the most significant means of heat transfer within a solid and between solid objects in thermal contact.
Conduction is the transfer of heat between objects that touch each other.
Therefore, Heat moves from hot sand to the bottoms of your feet by conduction.Hence Option (A) is correct.
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when one gram of gasoline burns in a cars engine, the amount of energy given off is approximately 1.03x10^4 cal. express this quantity in joules. use 1 cal= 4.184 j
The amount of energy in joules : 4.31 x 10⁴ J
Further explanationEnergy can be interpreted as the ability to do work
There are several examples of energy , including heat energy
The amount of heat is influenced by the mass of the object and the difference in temperature
Can be formulated
Q = m.c.ΔT
Q: heat received or removed by an object (J)
m: object mass (kg)
c: heat type substance (J / kg⁰C)
ΔT: temperature change (⁰C)
The amount of energy given off is 1.03x10⁴ cal.
Because 1 cal= 4.184 J, then
[tex]\tt =1.03\times 10^4\times 4.184\\\\=\boxed{\bold{4.31\times 10^4~J}}[/tex]
A baby weighs 3.91 kg and measures 51.4 cm. Convert the baby's weight
to pounds and its length to inches
what does science explain? (4 points)
A) moral values
B) biased opinion
C) meaning of life
D) natural phenomena
Answer:
D
Explanation:
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a man is 72 inches tall, what is his height in meters? round to three significant figures.
Answer:
1.829 meters is the answer
Explanation:
1. Any atom that is electrically neutral must contain -
Answer:
The same number of electrons and protons.
Explanation:
Because a proton has a charge of +1 and an electron has a charge of -1, the ratio of protons to electrons must be 1:1 for the atom to be neutral.
Please answer fast!
Where in an atom are protons located?
A.
in the nucleus
B.
in areas of probability
C.
in orbitals
D.
in the photons
Explanation:
they are located in the neucleus
Answer: they are located in the neucleus
Explanation:
i neeeed helllllpppppsss
Answer:
1.0 g/cm3
Explanation:
yeah that's the density of water
Answer:
a 1 g/cm3
Explanation:
per google- A common unit of measurement for water's density is agram per milliliter (1 g/ml) or 1 gram per cubic centimeter (1 g/cm3)
How many electrons do carbon and oxygen share?
I-0-I
:0:
Intro
Done
oxygen has 6 valence electrons and 2 electrons and carbon has 4 electron
Answer:
4!!!!!!!!!!
Explanation:
i got it right