Answer:
Energy is transferred when one molecule collides with another.
Explanation:
There are 3 processes of heat transfer. They are as follows:
ConductionConvectionRadiationConduction is the process of transfer of energy through collisions between neighboring atoms or molecules. When two bodies are in direct contact with each other, the process of conduction occurs.
Hence, the correct option is (A) "Energy is transferred when one molecule collides with another".
Answer:
A. Energy is transferred when one molecule collides with another. Is the correct answer via a p e x
Explanation:
what is a carnivore?
Answer:
I think its when someone eats only meat
Answer:
A meat eater. Or a animal that has a diet strictly set to other animals.
Explanation:
Hope this helps!
Which best completes the analogy?
B Cells : Produce Antibodies :: T Cells : ___________________
A. Get rid of good cells that have been infected
B. Tell B cells to start making antibodies
C. Tell killer cells to attack
D. remember antigens that have attacked the body
Answer:
d
Explanation:
d
What gets released back into the air when humans and animals breathe ? What is this process called?
Answer:
Respiration is the process humans and animals breathe c02 out
Answer:
CO2 is released into the air when we breathe
The process is called respiration
Which statement is correct about the rate of chemical reactions? (5 points) It increases when the temperature decreases. It increases when a catalyst is added. It does not depend on the temperature. It does not depend on the presence of catalysts.
There is an increase in temperature when the rate of chemical reactions increases.
What is a chemical reaction?The chemical reaction is the process in which the two or more substances where the reactions are converted into one or more different substances. These may be either chemical elements or compounds.
The chemical reaction rearranges the atoms of the reactants to create the different substances of the product. The speed of the reaction depends on the rate of temperature and as well reactant itself.
Find out more information about the chemical reactions.
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Answer:
It increases when a catalyst is added.
Explanation:
"A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process. Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism." (Khan Academy)
Students studying solid-state
physics are discussing the
microscopic structure of
materials.
Which student's statement
correctly identifies the nature
of these materials?
Answer:Material X would be classified as a crystalline solid because atoms are in a highly ordered three-dimensional arrangement.
Explanation: it makes sense I'm sorry if its wrong
5). At what temperature (K) will 0.854 moles of neon gas occupy 12.3 L at 1.95
atmospheres?
Answer:
338.38 K
Explanation:
Applying,
PV = nRT............... Equation 1
Where P = pressure, V = Volume, R = Temperature, n = number of moles, T = temperature.
Make T the subject of the equation,
T = PV/nR............. Equation 2
From the question,
Given: P = 1.95 atm, V = 12.3 L, n = 0.854 moles
Constant: R = 0.083 L.atm/K.mol
Substitute these values into equation 2
T = (1.95×12.3)/(0.854×0.083)
T = 338.38 K
What is the pressure of a car tire that had an initial pressure of 33.7 kPa but was
heated from 98.4°C to 110.°C?
Answer:
34752.6 Pa.
Explanation:
Applying,
P/T = P'/T'............... Equation 1
Where P = Initial Pressure, T = Initial Temperature, P' = Final pressure, T' = Final temperature.
make P' the subject of the equation
P' = (PT'/T).............. Equation 2
From the question,
Given: P = 33.7 kPa = 33700 Pa, T = 98.4°C = (273+98.4) = 371.4 K, T' = (110+273) = 383 K
Substitute these values into equation 2
P' = (33700×383)/371.4
P' = 34752.6 Pa.
1 Clouds are formed when millions of drops of water become suspended in the air. Which
of the following is a step in the process of cloud formation?
A Expansion of cold air
B Formation of carbon dioxide
C Condensation of water vapor
D Breakdown of atmospheric ozone
Answer:
C Condensation of water vapor
Explanation:
One of the components of the atmosphere is water vapour. Water vapour is always present in air.
This water vapour may combine with particles of dust and smoke and condense around them to form clouds.
As more water vapour condenses and coalesces, the clouds become thicker and precipitation eventually follows.
how many electrons does an element have if its atomic number is 20
Answer:
20 electrons
A neutral atom with atomic number 20 will have 20 electrons.
The atomic number is, by definiton, the number of protons in an atom's nucleus but for a neutral atom it's also equal to the number of electrons. Each element has a different, unique number of protons that determines its identity.
Explanation:
Low-beam headlights must show objects _______ feet ahead.
Answer:
150 feet
Explanation:
what is:
Na2O+SO2 =
for chemistry
Na2SO3 – Sodium sulfite
How do you write balance equations Fe2 S3+O2-Fe2O3+SO2
Answer:
2Fe2 S3+6O2 → 2Fe2O3+3SO2
Explanation:
2. What states of matter exist within the human body? What state of matter do you think your body is mostly made up of? Why? (4 points) Think about whether the body contains solids, liquids, or gases. Which of the three would you be most likely to find?
Answer:
Solids, liquids, and gases, exist in the human body. The body is mostly made up of liquid because the human body is 60% water. You would most likely be able to find solids (bones), liquids (blood, stomach acid) and gases (oxygen in your lungs or air in your digestive tract).
Explanation:
Balance the equation ___C+___Fe203—-____CO2+___Fe
Answer:
3,2,3,4
Explanation:
try this answer, it's syits best to the question
please help! due soon!
Answer:
I think it's
there are the same number of molecules on each side of the equation, then a change of pressure makes no difference to the position of equilibrium
What is the mass of disulfur pentoxide (S2O5)?
Answer: What is the mass of disulfur pentoxide (S2O5)?
Explanation:144.14g/mol
how many atoms are in 4.5 moles of Al?
Explanation:
4.5×6.022×10²³
27.099×10²³
According to Avogadro's number, there are 27.10×10²³ atoms in 4.5 moles of Al.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number.As 1 mole =6.023×10²³ atoms , thus,4.5 moles =4.5×6.023×10²³ = 27.10×10²³ atoms.
Thus, there are 27.10×10²³ atoms in 4.5 moles of Al.
Learn more about Avogadro's number,here:
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What is a state function?
Using the example of an ambulance, explain the Doppler Effect. Infer why the doppler effect can or cannot occur in all waves. PLEASE ANSWER ILL PICK BRAINLEIST TO THE FIRST ACTUAL ANSWER
Answer:
When the ambulance is coming towardss you the waves are smushed together and sound higher pitched but then it passes you and when tracveling away the waves are scretched out so the whee whoo sounds lower and that is because of the doppler effect
Which of the following an ionic bond like what holds Na+ and Cl- together in NaCl?
(Hint: Ionic bonds form between metals & non-metals.)
a
The chemical bond that holds H+ and N3- together in NH3
b
The chemical bond that holds Be2+ and Cl- together in BeCl2
c
The chemical bond that holds B3+ and Cl- together in BCl3
d
The chemical bond that holds H+ and Cl- together in HCl
Answer:
Rb
Explanation:
Rb look closely
Give an example of a metal and a nonmetal you use in everyday life.
Answer:
A type of metal I use everyday in life in using the iron door knob on my doors.
A nonmetal I use everyday is chlorine for when I need to clean my pool.
Explanation:
Is this your intention?
what name is given to group II elements in the periodic table
Answer:
alkaline earth metals
hope this helps
have a good day :)
Explanation:
Answer:
Alkaline earth metals
Explanation:
A gas has a volume of 45.0 mL and a pressure of .98 atm. If the pressure increased to 2.1 atm and the temperature remained the same, what would be the new volume?
Answer: The new volume is 95.45 mL.
Explanation:
Given: [tex]V_{1}[/tex] = 45.0 mL, [tex]P_{1}[/tex] = 0.98 atm
[tex]P_{2}[/tex] = 2.1 atm, [tex]V_{2}[/tex] = ?
According to Boyle's law, at constant temperature the pressure of a gas is inversely proportional to its volume.
Therefore, formula used to calculate the new volume is as follows.
[tex]\frac{P_{1}}{V_{1}} = \frac{P_{2}}{V_{2}}[/tex]
Substitute the values into above formula as follows.
[tex]\frac{P_{1}}{V_{1}} = \frac{P_{2}}{V_{2}}\\\frac{0.98 atm}{45.0 mL} = \frac{2.1 atm}{V_{2}}\\V_{2} = 95.45 mL[/tex]
Thus, we can conclude that the new volume is 95.45 mL.
Which of the following statements about alkynes is incorrect?
Alkynes are unsaturated hydrocarbons.
Alkynes have triple bonds.
Alkynes are saturated hydrocarbons.
Alkynes have carbon atoms.
Answer:
Alkynes are saturated hydrocarbons
Explanation:
Alkynes are groups of hydrocarbons that have the general formula of {Cn H2n - 2}. They have a triple carbon to carbon bond (C≡C) in their structure. Ethyne (HC≡CH) is the first member of the alkyne series.
Alkynes like alkenes are unsaturated hydrocarbons because of their triple and double carbon bonds respectively. Unsaturated hydrocarbons do not have a complete hydrogen atom in their structural composition. Hence, the statement that "Alkynes are saturated hydrocarbons" is FALSE.
what does the period number on the periodic table tell us?
Answer:
The period number on the Periodic table tells you the total number of orbits that the atom will have. In other words, the period number indicates the number of energy levels (or energy orbit) of an atom. For example, 1st period indicates that these elements possess 1 energy shell (or energy orbit).
Explanation:
Which of the following elements has the ability to undergo sublimation
iodine
oxygen
carbon sodium
Answer:
iodine
Explanation:
ILL MARK AS BRAINLESS PLS HELP
What volume of water is needed to make 5.41 M solution with 47.71 moles of HCL?
Answer:
0.113 liters
Explanation:
5.41 M / 47.71 moles = 0.113 liters
How many particles in 352 moles of KLICO3?
O 106 particles
O 2.12 x 1026 particles
O 6.38 x 1025 particles
Answer:
there are 106 particles
Here anwser questions 2 ,4,6 those charts okay I also put how the formula on top solve these problems ! Please help me I geniunuly don’t understand this concept if you do I will mark you brainliest I don’t understand :( ! please don’t scam me I’m helpless
Answer:
39.5L
Explanation: