Answer:
9.51 x 10²² atoms Au
Explanation:(mass: 31.1g Au)
(m. mass: 196.967 g/mol Au)
(atoms: ?)
(31.1g Au x 1 mol Au x 6.022 x 10²³ atoms Au/ 196.967g Au x 1 mol Au)
What is the best description of the role of decomposers in the carbon cycle?
They release the carbon that remains in the bodies of dead organisms.
They absorb carbon from carbon dioxide in the atmosphere.
They change carbon dioxide into a form that organisms can use.
They prevent carbon from escaping into the atmosphere.
Answer:
A
Explanation:
I got done taking the quiz If I could Show U I would but the answer is a
Answer:
The answer is "They release the carbon that remains in the bodies of dead organisms.".
Explanation:
what element is [Kr]5s24d105p2
[Kr]5s²4d10⁵p² represents iodine element. The fundamental components of matter are thought to be the elements.
What is element?A material is considered an element if it cannot be divided into two or even more simpler compounds by any kind of chemical process, including the use of light or warmth. For instance, when melting the chunk of gold, it nevertheless melts but remains as the precious metal element.
The fundamental components of matter are thought to be the elements. There are currently 118 known elements, 94 of which are found in nature while the remaining 24 are created artificially. [Kr]5s²4d10⁵p² represents iodine element.
Therefore, [Kr]5s²4d10⁵p² represents iodine element.
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Hans observed properties of four different waves and recorded observations about each one in his chart.
A 2-column table with 4 rows. The first column labeled Wave has entries W, X, Y, Z. The second column labeled Observations has entries scatters through a small opening to form a ray of light, bounces off a mirror, changes colors as it passes through a crystal, bends as it passes through an object.
Which statement is best supported by the table?
Wave W is being reflected, Wave X is being refracted, and waves Y and Z are being diffracted.
Wave X is being diffracted, Wave Z is being reflected, and waves Y and W are being refracted.
Wave X is being reflected, Wave Z is being refracted, and waves Y and W are being diffracted.
Wave W is being diffracted, Wave X is being reflected, and waves Y and Z are being refracted.
Answer/Explanation:
Wave W is being diffracted, Wave X is being reflected, and waves Y and Z are being refracted.
how much energy would be lost by 23 g of water if it was heated until it was 78 degrees celsius and then allow to cool down to 27 degrees celsius
Answer:
Q = -4903.14 j
Explanation:
Given data:
Mass of water = 23 g
Initial temperature = 78°C
Final temperature = 27°C
Heat lost = ?
Solution:
Specific heat capacity of water is 4.18 J/g.°C
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 27°C - 78°C
ΔT = -51°C
Q = 23 g × 4.18 J/g.°C × -51°C
Q = -4903.14 j (negative sign shows heat is released)
What is the main factor that determines how well two substances mix together?
Answer:
I believe it is density.
Explanation:
Hope this helps!
PLZZZ I NEED HELP THIS IS DUE AT 4:00 PM
Shane can run the length of a football field (100 yards) in 12 seconds. What is Shane’s speed?
Answer:
speed = distance/time
100 yards =91.5 metres
=91.5/12=7.625m/s
Answer:
17.05 MPH or 7.62 MPS
Explanation: I am not sure what one you are wanting, either in miles per hour or meters per second
Pollute means “to make impure.” Pollution is “the act of polluting.” If the suffix -ant means “something that performs an action,” what is a pollutant?
Answer:
something that makes another thing impure
Explanation:
Classify each of the following reaction as one of the 5 types: 2 Mg + O2 + 2 MgO O double replacement O decomposition O synthesis combustion O single replacement
Answer:
Synthesis
Explanation:
The reaction:
2Mg + O₂ → 2MgO
This reaction above is a synthesis or combination reaction. In such reaction, several products combines to give a single product.
The formation of a single product from two or more reactants is classified under this type of reaction
The driving force for this reaction type is the large and negative heat of formation of the product.
need to turn this in, in 10
mins please what’s the answer...thank you
Answer:
21 oxygen atoms
Explanation:
I think it is 7 but i am not sure
Explanation:
How do young predators learn how to hunt?
by strengthening their jaws
by playing with each other
by developing keen vision
by being fed by their mothers
-
pls help im on an exam--
Answer:
by playing with each other
Explanation:
the play fight and stuff so when the get older the hunt and stuff yk
Answer:
Playing with each other
Explanation:
Kinda like bear Cubs they play rough but if I’m wrong it gonna be by being fed by their mothers if I’m wrong
How many
particles would
be found in a
2.1 mol sample
of Aluminum
phosphate?
I have no idea but but whats your lucky number
What is the relationship between temperature and reaction rate?
Explanation:
Temperature has a direct relationship with reaction rate. The higher the temperature the faster the rate of reaction of a system.
For every 10°C rise in temperature above the room temperature, it has been found that reaction rates becomes double or triple. When the temperature of a reacting system increases, the kinetic energy of each of the reacting particles increases. The frequency of collision and effective collision also increases per unit of time. Many of the reacting particles will acquire an energy greater than or equal to the activation energy of the reaction.IF CORRECT ILL GIVE BRAINLIEST
all the drop boxes say compound & element. pick either or for each one.
Answer:
Hydrogen = element
Carbon dioxide = compound
Water = compound
Zinc = element
Nitrogen = element
Salt = compound
Helium = element
Carbon monoxide = compound
Explanation:
An element and a compound are different when it comes to the types of atoms they possess. An element has only one type of atom while a compound has two types of atoms. For example, Hydrogen is an element because it has two atoms of the same type and that is, the "Hydrogen atom."
On the contrary, Carbon dioxide has one carbon atom and two atoms for Oxygen. Therefore, it is a compound because it has two types of atoms: Carbon atom and Oxygen atom.
Water has two atoms of Hydrogen and one atom of Oxygen. Therefore, it is a compound because it has two types of atoms: Hydrogen atom and Oxygen atom.
In which part of the plant does photosynthesis occur?
Answer:
Photosynthesis takes place in the chloroplasts of the plant!!
Explanation:
I hope this helps!
Answer:
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
Explanation: oh oh i know this!!!!
B. Organic sedimentary rock
C. Chemical sedimentary rock
6. What type of sedimentary rock is fossiliferous limestone?
A. Clastic sedimentary rock
B. Organic sedimentary rock
C. Chemical sedimentary rock
Answer:
A. Clastic sedimentary rocks
Explanation:
Chemical form = CaCO3
Clastic sedimentary rocks form from the accumulation and lithification of mechanical weathering debris. Examples include: breccia, conglomerate, sandstone, siltstone, and shale.
Hope this helps! :)
Am I the only one who waits for a weird question to pop up and answer it?
Seriously, let me know.
Answer: those are the best questions to answer kfnmbysjghfbs they are literally so unnecassary, but the teaaaaaaa
Explanation:
After a certain pesticide compound is applied to crops, its decomposition is a first-order reaction with a half-life of 56 days. What is the rate constant, k, for the decomposition reaction?
The rate constant, k, for the decomposition reaction : k = 0.0124 / days
Further explanationGiven
The half-life of 56 days
Required
The rate constant, k
Solution
For first-order, rate law : ln[A]=−kt+ln[A]o
The half-life : the time required to reduce to half of its initial value.
The half life :
t1/2 = (ln 2) / k
k = (ln 2) / t1/2
k = 0.693 / 56 days
k = 0.0124 / days
The rate constant for the decomposition reaction has been 0.0124/days.
The rate constant has been given by;
log [Final concentration] = kt + log [Initial concentration]
k has been the rate constant, and t has been the time.
The initial concentration has been 1, after the half life period the concentration has been half i.e. 0.5 .
The given half life has been 56 days.
The rate constant can be calculated as:
log 1 = k(56) + log 0.5
k(56) = 0.693
k = 0.0124/days.
The rate constant for the decomposition reaction has been 0.0124/days.
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pls help
Beryllium has a specific heat of 1.825 J/(g . °C). How many joules of heat energy are required to raise the temperature of 2.300 grams of beryllium from 22.00 to 60.00°C?
Heat required to raise the temperature = 159.505 J
Further explanationGiven
c = specific heat of Beryllium = 1.825 J/g C
m = mass = 2.3 g
Δt = Temperature difference : 60 - 22 = 38 °C
Required
Heat required
Solution
Heat can be formulated
Q = m.c.Δt
Input the value :
Q = 2.3 x 1.825 x 38
Q = 159.505 J
NEED HELP ASAP, how many molecules are in 4nh3
Answer:
maybe 16?
Explanation:
Which law tells us that the youngest sedimentary layers are on the top and the oldest are on the bottom? None of the above The Law of Superposition The Law of Horizontal Originality The Law of Vertical Position
does energy transfer always result in phase change
These energy exchanges are not changes in kinetic energy. They are changes in bonding energy between the molecules. "If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance.
Compare the amount of copper predicted in part A with the amount measured in part B. What percentage of the predicted amount was obtained? Why aren’t these values the same?
Answer:
Explanation:
Because the experiment has an different independent and dependent variable and each part has a different result of what type of copper or what type of control you are using for you experiment.
PLS MARK BRAINLIEST IF CORRECT I WORKED HARD ON THIS ANSWER,HAVE A NICE DAY/NIGHT <3
Answer:
Because the experiment has a different independent and dependent variable and each part has a different result of what type of copper or what type of control you are using for your experiment.
Which elements families are most likely to react with one another?
:
alkali metals will
Why are the bacteria in a termite’s stomach considered mutualistic and not parasitic?
In commensalism the smaller partner benefits from the relationship, with no fitness effect on the host. There are fitness gains for both partners in mutualism, and a parasite benefits by exploiting but not directly killing its host.
hope this helps ^^
Calculate the mass of 4.60 x 10^25 atoms of neon?
Select one:
a. 0.264 g
b. 5.54 x 10^2 g
c. 1.54 x 10^3 g
d. 0.0382 g
1.54 x [tex]10^3[/tex] g is the mass of 4.60 x [tex]10^{25}[/tex] atoms of neon.
What are moles?A mole is defined as 6.02214076 × [tex]10^{23}[/tex]of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
1 mol of atoms = 6.02214076 × [tex]10^{23}[/tex]
Moles of neon in 4.60 x [tex]10^{25}[/tex] atoms = [tex]\frac{mass}{molar \;mass}[/tex]
[tex]\frac{4.60 X 10^{25}}{ 6.02214076 X 10^{23}}[/tex]
0.7638479709 = 76.38 mol
The molar mass of neon is 20 g/mol
76.38 mol x 20 g/mol
1.54 x [tex]10^3[/tex] g
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What is the fancy psychological term for "mental process"?
computation
cognition
telecommunication
ESP
Answer:
cognition
Explanation:
give me brainliest pls
Help if u good at science lol:)
Question 11 of 35
What does a meteoroid become when it enters Earth's atmosphere?
O
A. A comet
O
B. A moon
O
C. A meteor
D. An asteroid
Answer:
D is your answer
Explanation:
Answer:
C: a meteor
Explanation:
What do you have to do to change an atom labeled + ion or - ion into a neutral atom?
Answer:
to change an atom labeled + ion or -ion into a neutral atom, an electron is either added or removed from it
ipt Which most likely determines the shape of an ionic compound's crystals?
O A. the compound's melting point
O B. the compound's boiling point
O C. the electronegativity of the compound's elements
O D. the ratio and size of the compound's ions
Answer:
d. the ratio and size of the compound's ions
Explanation: The crystal structure of an ionic compound depends on the sizes of the cations and anions. and ratio of cations to anions.
HOPE THAT HELPS
middle one! please help. i’ll do anything.
Answer:
I believe the answer would be weathering
Answer:
Erosion
Explanation:
Because....
Deposition is the action of deposing someone, especially a monarch.
weathering is the process of wearing or being worn by long exposure to the atmosphere.