Answer:
1.54 × 10²⁰ molecules
Explanation:
Dividing the mass by the molar mass, we get the number of moles to be (0.045)/(176.12), which is about 0.0002555 mol.
Avogadro's law states that there are 6.022 × 10²³ molecules in one mole of a substance, so the answer is
(0.0002555)(6.022 × 10²³), which is 1.54 × 10²⁰ molecules.
An exergonic reaction __________ free energy, and an endergonic reaction __________ free energy.
Answer:
An exergonic reaction releases free energy, and an endergonic reaction absorbs free energy.
Explanation:
hope it helps
What is the volume of a
0.40 M Nal solution that contains
0.20 moles Nal in it?
Answer:
500ml or 0.5l
Explanation:
The concentration is 0.40 M so there are 0.40 moles in 1 l of the solution.
0.40 moles -> 1 l
but we have to go to 0.20 moles, 0.40/2 = 0.20 moles but we have to divide the volume also by 2 that makes 0.5 liters.
Answer: 0.5
Explanation:
The concentration is 0.40 M so there are 0.40 moles in 1 l of the solution.
0.40 moles -> 1 l
but we have to go to 0.20 moles, 0.40/2 = 0.20 moles but we have to divide the volume also by 2 that makes 0.5 liters.
According to the concept of entropy, what will likely happen to most molecules over time?.
They're going to fall apart.
What most molecules will likely experience over time?A system's entropy cannot decrease unless heat is being lost from it. This indicates that entropy cannot decrease in a closed system (i.e., nothing enters or leaves, and that means nothing at all), so it must either remain constant or rise. Entropy can decrease, rise, or stay constant in an open system when movement between the system and its surroundings is conceivable. Both of these outcomes leave open the option of a constant state.
Entropy:-
The quantity of atom-alignment combinations that can exist in a system is known as entropy. The quantity of energy that cannot be used for work can also be calculated from an object's entropy.
Learn more about Entropy here:-
https://brainly.com/question/17241209
#SPJ4
All of the following are anthropogenic greenhouse gases except Group of answer choices a. carbon dioxide. b. molecular oxygen. c. chlorofluorocarbons (CFCs). d. methane.
Answer:
c
Explanation:
its not a plant based gas
A(n) ________ is a dynamic sub-organization that can be created and eliminated depending on need
A(n) Business Unit is a dynamic sub-organization that can be created and eliminated depending on need.
What is Business Unit?Business unit is when the company wants its sales in a segmented way. This market offer, or it can be, for example, business area, segment line, market performance cases.
This strategy consists of the form adopted by many companies that divide their activities into independent business units, with different results, strategies and managers.
See more about Business unit at brainly.com/question/12042179
#SPJ12
What does a particular point on a line of a phase diagram represent?
A. The pressure created by the kinetic energy of molecules at a
particular temperature
B. The maximum temperature a substance can exist at without
bonds breaking
OC. The melting point or boiling point of a substance at a specific
pressure
OD. The conditions in which temperature and pressure have equal
effects on a substance
Answer:
The point at which the lines intersect represents the triple point.
Does an electron cause an electromagnetic wave to vibrate
Yes, an electron cause an electromagnetic wave to vibrate.
What is an electromagnetic wave?One of the waves is propagated by simultaneous periodic variations of electric and magnetic field intensity and that includes radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Electromagnetic waves are produced when something vibrates—an electric charge that moves back and forth.
When an electric charge vibrates, the electric field around it changes. Because the electric charge is in motion, it also has a magnetic field around it.
This magnetic field also changes as the charge vibrates.
Therefore, an electron causes an electromagnetic wave to vibrate.
Learn more about the electromagnetic wave here:
https://brainly.com/question/3596193
#SPJ1
Convert a speed of 88 m/s to its equivalent in cm/s.
pls help i don’t get it.
Answer:
8800 cm / s
Explanation:
There are 100 cm / m
so: 88 m/s * 100 cm / m = 8800 cm/s
( see how the 'm' cancels out and you are left with cm /s ?)
Explain how you know it must be oxygen. Where
did the oxygen come from?
Intro
Previous Activity
I
000
O Tutoring Help
Answer:
oxygen is a present in our atmosphere and mixed with other gases on the surrounding screen plants are also measure source of getting oxygen they take carbon dioxide from making their food by for the cities and give away oxygen in return
Explanation:
most of the earth oxygen comes from tiny Ocean plants are called phytoplaston
The table describes solids and plasmas.
-
Which statement can be placed in the blank cell to make the information in the table accurate?
can be crystalline
can be amorphous
are made of charged particles
are made of neutral particles
The statement that can be placed in the blank cell to make the information in the table accurate is Plasma : (D). are made of neutral particles
Meaning of plasmaPlasma can be defined as a form of matter, though its not as common as the three major forms of matter.
Plasma displays more of the features of a gas but it is not a gas. it has more density than a gas and is less dense than liquid and solid
In conclusion, The statement that can be placed in the blank cell to make the information in the table accurate is Plasma : (D). are made of neutral particles
Learn more about Plasma: https://brainly.com/question/2901507
#SPJ1
Answer:
Answer is (D) or fourth option
Explanation:
Plasmas are made of neutral particles
There are two common oxides of copper; one is 80% copper and the other is 89% copper by weight. Calculate the formula and name each compound.
Cupric oxide (CuO) and cuprous oxide (Cu2O) are the names of two oxides of copper.
Why both Cupric oxide (CuO) and cuprous oxide differ from one another?Both Cupric oxide (CuO) and cuprous oxide are different from one another because of the presence of number of copper atom. In one compound, copper is bonded with oxygen in 1:1 form whereas in the other compound, the copper is bonded with 2:1 form.
So we can conclude that Cupric oxide (CuO) and cuprous oxide (Cu2O) are the names of two oxides of copper.
Learn more about copper here: https://brainly.com/question/24856041
#SPJ1
If 0.889J of heat causes a 0.124 degree C temperature change, what mass of water is present?
0.889 ÷ 4187 ÷ 0.124 = 0.00171
not sure on what to do
Answer:
It's the first answer
Explanation:
Aqueous just means that the solution is just dissolved in water
what is the percent yield of sulfur dioxide if the burning of 25.0 g of carbon disulfide produces 40.5 g of sulfur dioxide?
Answer:
25-54-46-36 619-73 77-88-50
How many sublevels inn the second energy level?
There are two subshells that are s and p, which are present in the second energy level.
The energy level can be defined as the fixed distances from the nucleus of an atom where electrons may be found. Each energy level is divided into some Subshells. These subshells are known as s-subshell, p-subshell, d-subshell, and f-subshell. This subshell contains some orbitals, these orbitals are the place where there is the maximum probability of getting the electrons. In one orbital, a maximum of two electrons can be present.
Hence, there are two subshells in the second energy level.
Learn more about subshells here:
https://brainly.com/question/26438203
#SPJ10
How many moles of oxygen gas (02) are needed to completely react with 54.0 g of aluminum?
4A1+30₂2Al₂O3
54.0 g Al
1 mol Al
26.98 g Al
3 mol O₂
4 mol Al
[?] mol O₂
1.5 moles of [tex]O_{2}[/tex] gas
Reaction of Al with [tex]O_{2}[/tex] to form [tex]Al_{2} O_{3}[/tex] is given below...
2 Al + 1.5 [tex]O_{2}[/tex] → [tex]Al_{2} O_{3}[/tex]
Here, 2 moles of Aluminum reacts with 1.5 moles of [tex]O_{2}[/tex]
atomic weight of aluminum = 27 g / mole
so, 1 mole of aluminum contains 27 g
then how many moles are there if it has 54 g in it.
moles of aluminum in 54 g = 54/27 = 2 moles
As per the equation mentioned above,
2 moles of aluminum reacts with 1.5 moles of [tex]O_{2}[/tex].
∴1.5 moles of oxygen gas (02) are needed to completely react with 54.0 g of aluminum.
Learn more about moles here...
https://brainly.com/question/1427235
#SPJ10
What is the source of energy in nuclear power plants?
Answer:
URANIUMExplanation:
What is the source of energy in nuclear power plants?
Uranium is the fuel most widely used by nuclear plants for nuclear fission. Uranium is considered a nonrenewable energy source, even though it is a common metal found in rocks worldwide. Nuclear power plants use a certain kind of uranium, referred to as U-235, for fuel because its atoms are easily split apart.
what has the highest volume 1kg lead, 1kg of iron, 1kg of gold, or 1kg of copper
Answer:
1kg gold because when it's mined it needs stronger machines
1kg gold because when it's mined it needs stronger machines.
What is volume?The amount of space occupied by a three-dimensional figure as measured in cubic units.
Gold is called a heavy metal because of its high density, which comes from the fact that each of its atoms is individually very heavy.
Hence, 1kg gold because when it's mined it needs stronger machines.
Learn more about volume here:
https://brainly.com/question/27990934
#SPJ2
why can't amylase digest other substances?
Explanation:
saliva contains and amylase which randomly hydrogen all the one is equal to 4 glycosidic bonds of stars except it's out most bones and those next the branches on the hand glycogen being a highly branched molecule it is evident that amylase won't be a good animal eyes to digest it due to physical structure constance
Which of the following compounds would make a good electrolyte?
Select one:
O a. ethanol
O b. carbon dioxide
O c. sodium chloride
O d. water
Answer:
C. Sodium Chloride.
Explanation:
Because when NaCl dissolved in water, it will dissociate to produce 2 ions Na+ and Cl-.
Use the following scenario to calculate the carbon flux in the atmosphere. The amount of carbon that enters the atmosphere through natural processes is 211.6 GtC/yr and the amount that leaves the atmosphere through natural processes in 213.8 GtC/yr. The amount of carbon released by burning fossil fuels is 5.5 GtC/yr. What is the carbon flux in the atmosphere
The amount of carbon flux in the atmosphere will be 3.3 GtC/yr
Carbon flux calculationThe carbon flux in the atmosphere can be calculated by:
1. Removing the amount of carbon that leaves the atmosphere from the amount that enters the atmosphere.
2. Adding the amount of carbon released by fossil fuel burning.
Thus,
Carbon flux = 211.6 - 213.8 + 5.5 = 3.3 GtC/yr
More on carbon flux can be found here: https://brainly.com/question/15857288
#SPJ12
Eric pours some iced tea into a glass. When he puts the iced tea in the glass, the energy of the glass decreases. What must be true of the energy of the iced tea?
Iced tea's energy increases while the energy of the glass decreases.
What is energy?Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms
Iced tea's energy increases while the energy of the glass decreases because the ice is getting warmer so the glass is also getting warmer. meaning that the glass is decreasing in energy while the ice tea is increasing in energy.
Hence, iced tea's energy increases while the energy of the glass decreases.
Learn more about the energy here:
https://brainly.com/question/1932868
#SPJ1
Lead (II) acetate reacts with sodium hydroxide to produce lead (II) hydroxide and sodiumacetate. Please write the chemical equation and *don't* balance the sides!
The chemical equation is:
Pb(CH₃COO₎₂ + NaOH ---> Pb(OH)₂ + CH₃COONaWhat is a chemical equation of a reaction?A chemical equation of a reaction is an equation which shows the reactants and products of a reaction using their chemical formulae.
The chemical equation when Lead (II) acetate reacts with sodium hydroxide to produce lead (II) hydroxide and sodium acetate is given below:
Pb(CH₃COO₎₂ + NaOH ---> Pb(OH)₂ + CH₃COONa
Learn more about chemical equation at: https://brainly.com/question/26694427
#SPJ1
Express in scientific notation. Choose the answer with the proper number of significant figures: 1.24 x 10^6/6.2 x 10^-3
Answer:
1.24×10^6/6.2×10^-3
200
acc to scientific notation: 0.2×10^3 is the answer
Explanation:
pls mark me as brainlest
What is the difference between glucose and fructose.
Answer:
glucose is in large sugar molecules, while fructose is in simple fruits and vegetables
glucose breaks down disaccharides or polysaccharides with large sugar molecules and fructose is found in fruits and veggies like corn, mangos, and apples. they are both carbs.
The theoretical yield of NaBr from
2.36 mol FeBr3 is 7.08 mol NaBr.
What is the percent yield if 6.14 mol
NaBr were collected?
[?]%
Taking into account definition of percent yield, the percent yield for the reaction is 100%.
Reaction stoichiometryIn first place, the balanced reaction is:
2 FeBr₃ + 3 Na₂S → Fе₂S₃ + 6 NaBr
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
FeBr₃: 2 moles Na₂S; 3 molesFе₂S₃: 1 mole NaBr: 6 molesMoles of NaBr formedThe following rule of three can be applied: if by reaction stoichiometry 2 moles of FeBr₃ form 6 moles of NaBr, 2.36 moles of FeBr₃ form how many moles of NaBr?
[tex]moles of NaBr=\frac{2.36 moles of FeBr_{3}x6 moles of NaBr }{2 moles of FeBr_{3}}[/tex]
moles of NaBr= 7.08 moles
Then, 7.08 moles of NaBr can be produced from 2.36 moles of FeBr₃.
Percent yieldThe percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.
The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:
[tex]percent yield=\frac{actual yield}{theorical yield}x100[/tex]
where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
Percent yield for the reaction in this caseIn this case, being the molar mass of NaBr 102.9 g/mole, you know:
actual yield= 7.08 moles× 102.9 g/mole= 728.532 gramstheorical yield= 7.08 moles× 102.9 g/mole= 728.532 gramsReplacing in the definition of percent yields:
[tex]percent yield=\frac{728.532 grams}{728.532 grams}x100[/tex]
Solving:
percent yield= 100%
Finally, the percent yield for the reaction is 100%.
Learn more about
the reaction stoichiometry:
brainly.com/question/24741074
brainly.com/question/24653699
percent yield:
brainly.com/question/14408642
#SPJ1
Answer: 87%
Explanation:
A 126.1-gram block of granite at 92.6°c is dropped into a tub of water at 24.7°c in an isolated system. the final temperature of both the granite and the water is 51.9°c. the specific heat capacity of granite is 0.795 joules/gram degree celsius, and the specific heat capacity of water is 4.186 joules/gram degree celsius. the granite block transferred of energy, and the mass of the water is .
The granite block transferred 4,080 joules of energy, and the mass of the water is 35.8 grams.
How we calculate heat transfer of any system ?Heat transfer in any system can be calculated as follow:
q = mCΔT
Given ;
m = mass of granite = 126.1 g C = specific heat of granite = 0.795 joules/gram degree CelsiusΔT = change in temperature of granite = 51.9 °C - 92.6 °C = -40.7 °CPutting all the values in folowing equation,
q = mCΔT
we get
q = 126.1 × 0.795 × -40.7 = -4080 J
Now by using same formula, we can also calculate the mass of water in the following way:
m = q / CΔT
where
C = specific heat of water = 4.186 joules/gram degree Celsius ΔT = change in temperature of water = 51.9 °C – 24.7 °C = 27.2 °CPutting all these values ;
m = -4080 / 4.186 × 27.2 = 35.8 g.
Hence, 4,080 joules of energy is transferred by granite block and 35.8 g is the mass of water.
To learn more about heat transfer here ;
brainly.com/question/18980657
#SPJ1
When water vapor cools, it condenses.
Which number represents this process on the hydrologic cycle
diagram?
O 1
02
O 3
04
Number 2 represents this process on the hydrologic cycle diagram. Therefore, the correct option is option B.
What is hydrologic cycle?One of the most significant natural processes is the hydrologic cycle, which we may often take for granted. This process causes the water in the entire earth to change forms, locations, or accessibility.
Water transitions between three distinct forms during this cycle, to put it simply. It can be found in many states of liquid, gas, or solid, including ice, steam, and water. Water will frequently transition between these three states throughout the cycle: freezing into ice, melting into water, evaporating becoming water vapor, but finally condensing back into water. Number 2 represents this process on the hydrologic cycle diagram.
Therefore, the correct option is option B.
To know more about hydrologic cycle, here:
https://brainly.com/question/1338837
#SPJ5
A sealable bag holds 3.79 L of
gas. How many moles of H₂
gas are needed to fill the bag
at 1.0 atm and 293 K?
The H₂ gas are needed 0.157moles to fill the bag .
For solving this problem we use the ideal gas equation. It is also called the general gas equation . This equation use for a hypothetical ideal gas. . It has several limitations. It was first stated by Benoit Paul Emile Clapeyron in 1834 . The ideal gas law is written by an empirical form:
PV = n R T
where-
P = Pressure
V = volume
T = Temperature
n = The amount of substance
R = Ideal gas constant
Now we have the values of these terms as-
P = 1 atm , V = 3.79L , T = 293K
and R = 0.0826 L/atm
For getting moles of hydrogen we can use the values of variables in ideal gas equation as -
P V = n R T
Now (1 atm) × ( 3.79L ) = n × ( 0.0826 L/atm) × ( 293K)
n = (1 × 3.79) ÷ (0.0826 x 293)
= 0.157 moles
So that the 0.157moles of H₂ gas are needed for fill the bag .
Learn more about the ideal gas here:
https://brainly.in/question/11882
#SPJ10
How many atoms from the following molecule will be detected in a 13c nmr experiment? we are not asking for unique signals, just total number of atoms
The structure of the compound, there will be ten unique signals in the carbon 13 NMR of the compound.
What are NMR signals?The NMR signals shows the atoms in a compound that are in unique chemical environments. The atoms that are in the same chemical environment will only give one signal.
Based on the structure of the compound, there will be ten unique signals in the carbon 13 NMR of the compound.
Learn more about carbon 13 NMR :https://brainly.com/question/9442853
#SPJ12
