Answer:
"A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O2 as one reactant. The combustion of hydrogen gas produces water vapor." and "A synthesis reaction occurs when two or more reactants combine to form a single product. ... In a double replacement reaction, two compounds exchange elements. A combustion reaction occurs when a substance reacts quickly with oxygen. Combustion is commonly called burning"
Explanation:
I tried
Think about how particles are arranged inside atoms. Please name and describe those three particles, and describe how the particles are arranged inside atoms. Some topics to include are: the charge of the particles, the mass of the particles, and where the particles are located.
How many moles of manganese in 4.07 x 1024 atoms of manganese?
Answer:
6.76 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{4.07 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 6.760797...[/tex]
We have the final answer as
6.76 molesHope this helps you
how does skin protect the body from pathogens?
A it produces whit blood cells that reconize and eat pathogens.
b it transsfers pathogens to lymph and blood plasma
c it traps pathogens in oil and seat produced by glands.
d. it has hairs that sweep pathogens away from the body
Answer:
C: It traps pathogens in oil and sweat
Explanation:
The skin has oil and sweat which kills pathogens as they are like a waterbarrier.
The skin protects the body from pathogens by trapping pathogens in oil and sweat produced by glands. Thus, the correct option for this question is C.
What are Pathogens?Pathogens may be defined as those living organisms which are capable of inducing diseases in other living organisms including humans. Some examples of pathogens include bacteria, fungi, protozoa, etc.
Skin is considered the first line of defense against pathogens in humans. This is because skin significantly consists of sebaceous and sweat glands that consistently secrete oils and sweat that trap the pathogens and eliminate them from entering the body.
Therefore, the skin protects the body from pathogens by trapping pathogens in oil and sweat produced by glands. Thus, the correct option for this question is C.
To learn more about Pathogens, refer to the link:
https://brainly.com/question/14162086
#SPJ2
Explain why the electron configuration of 2-3-1 represents an atom in an excited state?
Answer:
See explanation
Explanation:
If we look at the electron configuration closely, we will discover that the element must have had a ground state electron configuration of 2,4.
This is because, the innermost shell usually holds two electrons while the outer shells hold eight electrons each. The four electrons must be accommodated in the second shell in the ground state configuration of the compound.
However, when the atom is excited, one electron from this shell may move to the third shell to give the excited state configuration 2-3-1 as shown in the question.
Which of the following atoms has the largest radius?
a. lithium
b. lead
C. cesium
d. fluorine
e. carbon
Explanation:
first one, a. lithium. it's the largest
Observe: Look at the red lithium atom and the blue oxygen atom. Recall that most atoms are stable when their outermost ring has eight electrons. (Some atoms, such as lithium and beryllium, are stable when their outermost ring has two electrons.)
How many electrons will the lithium atom give up to become stable?
1. eight
2. seven
3. two
4. one
Answer:
4. one
Explanation:
H to I in the diagram indicates two layers of:
A. phospholipids
B. gated channel proteins
C. pore proteins
D. cholesterol
How do HOT AIR BALLOONS work when ascending and descending explain in terms of gas behavior?
Answer: Animation: Burning gas makes the air inside the balloon less dense, producing an upward force or lift. 1) A hot air balloon stays on the ground (or descends) when the air inside it is too cool. ... 3) When the air is hotter still, the balloon rises because the lift force is greater than the weight.
Explanation:
Common sense
Calculate the atoms of hydrogen in 52.0 g of H2O.
Answer:
34.81 ×10²³ atoms
Explanation:
Given data:
Mass of water = 52.0 g
Number of atoms of hydrogen = ?
Solution:
Number of moles of water:
Number of moles = mass/molar mass
Number of moles = 52.0 g/ 18 g/mol
Number of moles = 2.89 mol
1 mole of water contain 2 mole of hydrogen.
2.89 mole of water contain 2.89× 2= 5.78 moles of hydrogen.
Number of atoms of hydrogen:
1 mole = 6.022×10²³ atoms
5.78 mol × 6.022×10²³ atoms / 1mol
34.81 ×10²³ atoms
A compound is 39.97% carbon, 13.41% hydrogen, and 46.62% nitrogen. What is the empirical formula?
Answer:
CH4N
A compound is 39.97% carbon, 13.41% hydrogen, and 46.62% nitrogen.
Explanation:
Hope this helps.
Answer: CH4N is correct
Explanation:
39.97% carbon
13.41% hydrogen
46.62% nitrogen.
What is depicted as the yellow arrows in the following image? (Using a scientific vocabulary word we learned in class and provide its definition) Which makes a bigger current- faster moving electrons or slower moving electrons?
Answer:
Electric Current
Explanation:
The yellow arrows in the following image depict electric current. Electric current is defined as the continuous flow of electrons in an electric circuit. Electrons present in the conducting material which move from one to another atom randomly from the negative terminal through the connecting wires and back to the positive terminal.
Faster moving electrons make a bigger current because faster moving electrons collide more with each other that generates more heat which results into a higher current.
Hence, The yellow arrows in the following image depict electric current and Faster moving electrons make a bigger current.
The yellow arrow in the diagram shows the flow of electrons.
Current is defined as the flow of electrons in a circuit. The yellow arrows represents the direction of the flow of electrons in the circuit. The battery provides the potential difference that drives the flow of electrons through the wire.
Since current has to do with the movement of electrons in a circuit, the faster the movement of the electrons, the bigger the current.
Learn more: https://brainly.com/question/8646601
What will a medium mass star become at the very end of its life cycle
Which of the following describes redox in displacement plating?
Science hmk due tmr morning need help!! pls answer all 3 and number which one is which for example...
1.j
2.j
3.j
Do bacteria help people?? This is science but there is no tab
Answer:
Yes
Explanation:
Some bacteria is good for you like the bacteria in your digestive system, which helps with breaking down food and keeping you healthy
coefficients to lowest possible
ratio, if necessary.
Students are copying their homework assignment from the whiteboard in their dimly lit classroom Some students are wearing eyeglasses, some are not wearing anything over their eyes, and
one student is wearing dark sunglasses. Which material allows the least light to pass through it so that the smallest amount of light reaches the student's eyes?
Eyeglasses
Sunglasses
Air
Answer:
sunglasses
Explanation:
Please help! Will mark brainliest!
Answer:
A
Explanation:
Which element could provide one atom to make an ionic bond with fluorine
Carbon is stored in leaves in various forms, such as sugar. When leaves decay,they lose mass. Which of the following sentences explains what happens to the carbon that is stored in leaves when they decay? * 1 point
Answer:
This question lacks options, however, it can be answered based in general understanding. The answer is:
The carbon is released into the atmosphere and soil during decomposition
Explanation:
Carbon is an important element that makes up the biomass of living organisms. Organisms like plants as described in this question, store carbon as sugars, which they synthesized during photosynthesis. However, when they decompose/decay, they lose this carbon content.
Decomposition is the process carried out by microbes such as fungi, bacteria etc involving the breaking down of an organic molecule into inorganic ones. Hence, when leaves of a plant die, they undergo decomposition i.e. the carbon content in their leaves present as sugar (organic molecules) is broken down to release the carbon in form of carbon dioxide, into the atmosphere, soil etc. Hence, the carbon that is stored in leaves are RELEASED when they decay causing them to lose mass.
Why are you able to smell things across a room or form great distances
Answer:
We smell hot food from distance because of the diffusion process. Diffusion is the spreading out and intermixing of particles From one substance into another substance due to the movement of particles.
Explanation:
What happens when a virus becomes latent?
Answer:
the full viral genome is retained in the host cell, but its expression is dramatically restricted, such that few viral antigens and no viral particles are produced.
Explanation:
I will give you Brainly if you awser correct if your gonna awser for points pl put I don’t know
Answer:
C
Explanation:
Show your work with good use of units, rounding, and significant figures. [Hint: it is good practice to show the value of your answer before you round off to the final answer with the correct significant figures!]
(8 points) How much heat is required to convert 10.00 g of ice at –20.00°C to water at 25°C. The specific heat of ice is 2.09J/g°C; the specific heat of water is 4.182 J/g°C; the heat of fusion is 333.0 J/g.
Group of answer choices
Heat required : 4.8 kJ
Further explanationThe heat to change the phase can be formulated :
Q = mLf (melting/freezing)
Q = mLv (vaporization/condensation)
Lf=latent heat of fusion
Lv=latent heat of vaporization
The heat needed to raise the temperature
Q = m . c . Δt
1. heat to raise temperature from -20 °C to 0 °C
[tex]\tt Q=10\times 2.09\times (0-(-20)=418~J[/tex]
2. phase change(ice to water)
[tex]\tt Q=10\times 333=3330~J[/tex]
3. heat to raise temperature from 0 °C to 25 °C
[tex]\tt Q=10\times 4.18\times (25-0)=1045~J[/tex]
[tex]\tt Q~tot=418+3330+1045=4793~J\rightarrow rounding~and~2~sig~figs=4.8~kJ[/tex]
what is formula for Bromine?
Br2
I looked it up and it said that Bromine's formula is Br2
Answer:Br2
Explanation:
FOR 50 POINTS & A BRAINIST*
1.) For an atom of sulfur, there are
A.) two electron shells with 6 valence electrons
B.) three electron shells with 6 valence electrons
C.) four electron shells with 6 valence electrons
D.) five electron shells with 6 valence electrons
2.) Which atom has four electron shells with 7 valence electrons?
A.) F
B.) CI
C.) Br
D.) I
3.) Which atom has three electron shells with 8 electrons in its outermost orbit?
A.) He
B.) Ne
C.) Ar
D.) Kr
4.) Which method should be used to draw electrons that are involved in a collision during a chemical reaction?
A.) Bohr's model
B.) Lewis dot model
C.) Addition model
D.) Subtraction model
Answer:
1. B
2. C
3. C
4. B
Explanation:
1. An atom of sulfur has an atomic number of 16. It has three electron shells and six valence electrons, therefore, it belongs to period 3, group VIA of the periodic table
2. Bromine has an atomic number of 35. It belongs to period 4 group VIIA of the periodic table. Therefore, it has four electron shells and seven valence electrons.
3. Argon has an atomic number of 18. It belongs to period 3, group IVA of the periodic table. Therefore, it has three electron shells and eight valence electrons.
4. The Lewis dot model use structures that represent the valence electrons of atoms within a molecule existing as lone pairs or when involved in bonding. They can be used to draw electrons that are involved in a collision during a chemical reaction.
The world's largest importer of fish products is:
A. Japan
B. China
C. United States
D. Norway
PLEASE GICE ME THE RIGHT ANSWER MY GRADES ARE BADDDD
Answer:
A. Japan
Explanation:
Answer:
japan xd
Explanation:
What would be one way to avoid static electricity? А) Dry cotton fabrics and synthetic fabrics separately. B) Run a metal clothes hanger across your dry hair. C Use a blow dryer to dry your hair. D Wear shoes with rubber soles.
Answer: The answer would be A.
Explanation:
Answer: B
Explanation:
What is the difference between moles and mass?
atoms are so small that approximately _______ of them can fit at the end of a needle?
Answer:
5 million million atoms can fit at the end of a needle
Answer:
Let's just say 5 million million hydrogen atoms could fit at the end of a needle.
Explanation:
Atoms are 100 picometers, and to compare, the amount of even 1 centimeter, a calculator can't even figure out how many picometers are in a centimeter because there is just too much picometers.