Number of particles inside a sugar bowl = 4.4 x 10²³
Further explanationGiven
The molar mass of sugar = 342.3 g/mol
mass of sugar = 250 g
Required
Number of particles
Solution
1 mol = 6.02 x 10²³ particles
mol of sugar :
[tex]\tt mol=\dfrac{mass}{molar~mass}[/tex]
mol = 250 g : 342.3 g/mol = 0.73 mol
Number of particles :
N = n x No
N = 0.73 x 6.02 x 10²³
N = 4.39 x 10²³ ≈ 4.4 x 10²³
When all the colors of the spectrum are combined, what will the human
eye see?
A black
B. blue
C. red
D. white
Answer: white?
Explanation:
When all the colors of the spectrum are combined and strike the human eye at the same time, the human eye will see white color. Therefore, option (D) is correct.
What is the electromagnetic spectrum?The electromagnetic spectrum can be described as the range of frequencies of electromagnetic radiation and its wavelengths and photon energies. The electromagnetic spectrum have range from below one hertz to above 10²⁵ hertz.
Electromagnetic radiation with a wavelength between 380 to 760 nm is detected by the human eye and recognized as visible light. Other wavelengths, especially near-infrared and ultraviolet are also sometimes referred to as light.
White light can be defined as a combination of lights of different wavelengths in the visible region of the spectrum. When white light is passed through a prism splits it up into the several colors of light observed in the visible spectrum.
Therefore, all the colors of the spectrum are combined, and the human eye will see white color.
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Give an example of chemical reaction that occurs in everyday life
Answer: metal and salt water
Explanation: salt starts to brake down metal and metal is everywhere in the ocean hope this helps
Answer:
baking a cake.
Explanation:
baking a cake is an example of a chemical reaction that happens daily because a new substance is forming when the cake is being baked. hope this helps! :)
List all possible oxidation numbers for the elements. 21. Al
22. Bi
23. Ni
24. Xe
25. Pb
Answer:
21. Al (Aluminium)
+3 (most common), -1, -2, +1, +2
22. Bi (Bismuth)
+3 (most common), -3, -2, -1, +1, +2, +4, +5
23. Ni (Nickel)
+2 (most common), -2, -1, 0,+1, +3, +4
24. Xe (Xenon)
0 (most common), +1, +2, +4, +6, +8
25. Pb (Lead)
+2 (most common), +4 (most common), -4, -2, -1, +1, +3
Explanation:
Now we proceed to present the answers for each element:
21. Al (Aluminium)
+3 (most common), -1, -2, +1, +2
22. Bi (Bismuth)
+3 (most common), -3, -2, -1, +1, +2, +4, +5
23. Ni (Nickel)
+2 (most common), -2, -1, 0,+1, +3, +4
24. Xe (Xenon)
0 (most common), +1, +2, +4, +6, +8
25. Pb (Lead)
+2 (most common), +4 (most common), -4, -2, -1, +1, +3
01:29:56
What must be true about two objects if heat is flowing between them?
The objects must be different temperatures.
The objects must be the same temperature.
The objects must both be over room temperature.
The objects must both be under room temperature.
Answer:
a
Explanation:
i just took the quiz
What is the correct formula to determine density?
Answer:
density =mass/volume
Explanation:
p=m/v
p means raw
m means mass
v means volume.
3) Tears are produced by the lacrimal glands located:
A) above the lateral canthus of each eye
B) below the medial canthus of each eye
C) below the lateral canthus of each eye
D) above the medial canthus of each eye
E) behind the nasal bones
HELP??????..... Which type of semiconductor is created by doping with atoms that contain more valence electrons than the semiconductor material?
A. Intrinsic and p-type
B. Intrinsic
C. N-type
D. P-type
Answer:
Explanation:
N - type semi conductor
The reaction where sodium (Na) reacts with water to produce hydrogen gas is a type of reaction.
Answer:
In what way and in what form does sodium react with water? A colourless solution is formed, consisting of strongly alkalic sodium hydroxide (caustic soda) and hydrogen gas. This is an exothermic reaction.
why are concerns like safety and recycling important in astronomy
Answer:
Keep the world safe and clean
Explanation:
safety = keep people inline and help them from making bad decisions
clean = keep the world from being polluted or trashy
Astronomy deals with the study of celestial objects such as moon, stars, sun, planets, etc.
Safety is the art of being protected from danger
Recycling is the process of waste conversion. That is, useful materials are generated from wastes.
Astronomers, in their exploration of extraterrestrial bodies, need to ensure that proper measures are taken to ensure their safety in these locations. Unhealthy practices such as deforestation and indiscriminate waste disposal may cause environmental hazards such as global warming. This is a threat to the atmosphere.
Therefore, wastes have to be converted to reusable products to discourage indiscriminate disposals. Hence the importance of the terms "safety" and "recycling" in astronomy.
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2 Ag20 →4 Ag + O2 what reaction is this
Answer:
Decomposition
Explanation:
hope it helps you
How did modern scientists experiment with Van Goghs paints to determine their chemical reactions?
Answer:
the would test random expirements
What is the definition of climate?
1) An area's long term weather pattern
2)When large air masses of different density, moisture, and temperature mee
3)The state of the atmosphere at a given place and time
4)Large volume of air that has similar characteristics of temperature and water
vapor content
Answer:
1) An area's long term weather pattern
Explanation:
Climate is defined as the weather pattern in an area for the long term. Climate means the usual condition of the humidity, temperature, wind, rainfall, and atmospheric pressure in the surface area of Earth for the long term. Usually the time period for a climate in a region is taken over 30-years.
Weather is the state of the atmosphere and climate the long-term weather pattern of the area. For example: degree to which it is hot or cold is weather and expect snow in the Northeast in every January is climate.
Hence, the correct answer is "1) An area's long term weather pattern".
g Suppose a 49. L reaction vessel is filled with 1.5 mol of NO. What can you say about the composition of the mixture in the vessel at equilibrium
The question is incomplete, the complete question is:
At a certain temperature, the equilibrium constant [tex]K_{eq}[/tex] for the following reaction is 0.74:
[tex]NO_3(g)+NO(g)\rightleftharpoons 2NO_2(g)[/tex]
Suppose a 49.0 L reaction vessel is filled with 1.5 mol of [tex]NO_3[/tex] and 1.5 mol of NO. What can you say about the composition of the mixture in the vessel at equilibrium?
A. There will be very little [tex]NO_3[/tex] and NO.
B. There will be very little [tex]NO_2[/tex]
C. Neither of the above is true.
Answer: The correct option is B. there will be very little [tex]NO_2[/tex]
Explanation:
We are given:
Initial moles of [tex]NO_3[/tex] = 1.5 moles
Initial moles of NO = 1.5 moles
Volume of vessel = 49 L
As, moles of reactants and moles of products are equal, the volume term will not appear in the equilibrium constant expression.
Equilibrium constant for the reaction = 0.74
For the given chemical equation:
[tex]NO_3(g)+NO(g)\rightleftharpoons 2NO_2(g)[/tex]
Initial: 1.5 1.5 -
At eqllm: 1.5-x 1.5-x 2x
The expression of equilibrium constant for the above reaction:
[tex]K_{eq}=\frac{[NO_2]^2}{[NO_3]\times [NO]}[/tex]
Putting values in above equation, we get:
[tex]0.74=\frac{(2x)^2}{(1.5-x)(1.5-x)}\\\\x=-1.13, 0.451[/tex]
Neglecting the negative value of equilibrium constant because concentration cannot be negative
Equilibrium concentration of [tex]NO_3[/tex] = (1.5 - x) = (1.5 - 0.451) = 1.049 moles
Equilibrium concentration of NO = (1.5 - x) = (1.5 - 0.451) = 1.049 moles
Equilibrium concentration of [tex]NO_2[/tex] = 2x = [tex](2\times 0.451)=0.902mol[/tex]
There are 3 possibilities:
If [tex]K_{eq}<1[/tex], the reaction is reactant favoredIf [tex]K_{eq}>1[/tex], the reaction is product favored.If [tex]K_{eq}=1[/tex], the reaction is in equilibrium.Here, the value of [tex]K_{eq}=0.74[/tex], which is less than 1, therefore the reaction is reactant favored and we can say that there will be very little [tex]NO_2[/tex].
Hence, the correct option is B. there will be very little [tex]NO_2[/tex]
CHEMISTRY HELP
Once the following equation is balanced, what is the correct coefficient for Z₂?
Answer:
The coefficient of Z₂ is 1.
Explanation:
From the question given above:
X + ZY —> XY + Z₂
Next, we shall balance the equation to obtain the coefficient of Z₂. This can be obtained as follow:
X + ZY —> XY + Z₂
There is 1 atom of Z on the left side and 2 atoms on the right side. It can be balance by putting 2 in front of ZY as shown below:
X + 2ZY —> XY + Z₂
There are 2 atoms of Y on the left side and 1 atom on the right side. It can be balance by putting 2 in front of XY as shown below:
X + 2ZY —> 2XY + Z₂
Now, we have 1 atom of X on the left side and 2 atoms on the right side. It can be balance by putting 2 in front of X as shown below:
2X + 2ZY —> 2XY + Z₂
Now the equation is balanced.
Thus, the coefficient of Z₂ is 1.
Describe the process of freezing ice cream in terms of heat flow.
Answer:
Freezing the mix is one of the most important operations in making ice cream, for upon it depend the quality, palatability, and yield of the finished product. Typically, freezing of ice cream is accomplished in two steps: (1) dynamic freezing, where the mix is frozen quickly while being agitated to incorporate air and to limit the size of ice crystals formed; and (2) static freezing, where the partially frozen product is hardened without agitation in a special low-temperature environment designed to remove heat rapidly. Although these steps primarily encompass freezing, or the formation of ice crystals, there are several other important processes that take place during this time that significantly impact the quality of ice cream. Both the dispersion of air bubbles and rearrangement of fat globules occur during the freezing steps.
Explanation:
how are Ionic and Covalent Bonds are formed with examples ?
Answer:Comparison of Ionic and Covalent Bonds
In an ionic bond, the atoms are bound together by the electrostatic forces in the attraction between ions of opposite charge. ... For example, sodium (Na), a metal, and chloride (Cl), a nonmetal, form an ionic bond to make NaCl. In a covalent bond, the atoms bond by sharing electrons.
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A compound is found to contain 64.80 % carbon, 13.62 % hydrogen, and 21.58 % oxygen by weight. To answer the questions, enter the elements in the order presented above. 1. What is the empirical formula for this compound
Answer:
[tex]C_{4}H_{10}O[/tex]
Explanation:
Hello!
In this case, since the empirical formula of compounds whose by-mass compositions are known, is computed by first computing the moles considering those compositions as actual masses:
[tex]n_C=\frac{64.82g}{12.01g/mol}=5.40mol\\\\n_H=\frac{13.62g}{1.01g/mol}=13.5mol\\\\n_O=\frac{21.58g}{16g/mol}=1.35mol[/tex]
Next, we divide each moles by the fewest ones, in this case those of oxygen to obtain the subscript in the empirical formula:
[tex]C=\frac{5.40}{1.35}= 4\\\\H=\frac{13.5}{1.35}=10\\\\O=\frac{1.35}{1.35}=1[/tex]
Thus, we obtain:
[tex]C_{4}H_{10}O[/tex]
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What mass of solid aluminum hydroxide can be produced when 50.0mL of 0.200M aluminum nitrate is added to 200.0mL of 0.100M potassium hydroxide
Answer:
520 mg Al(OH)₃
Explanation:
The reaction that takes place is:
Al(NO₃)₂ + 3KOH → Al(OH)₃ + 3KNO₃Now we calculate how many moles of each reagent were added, using their concentrations and volumes:
Al(NO₃)₂ ⇒ 50.0 mL * 0.200 M = 10 mmol Al(NO₃)₂ KOH ⇒ 200.0 mL * 0.100 M = 20 mmol KOH10 mmol of Al(NO₃)₂ would react completely with (10*3) 30 mmol of KOH, there are not as many KOH mmol, so KOH is the limiting reactant.
We calculate how many moles of Al(OH)₃ are produced, using the limiting reactant:
20 mmol KOH * [tex]\frac{1mmolAl(OH)_3}{3mmolKOH}[/tex] = 6.67 mmol Al(OH)₃Finally we convert mmol of Al(OH)₃ to mg, using its molar mass:
6.67 mmol Al(OH)₃ * 78 mg/mmol = 520 mg Al(OH)₃please helpppppppppp
Answer:
Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles
And the presence of mutagens can all impact which of an animal's genes are expressed, which ultimately affects the animal's phenotype.
Match the word with the definition. Write the correct letter in the space
provided. Reminder
that your answers should be blue.
A. Proton
B. Periodic Table
C. Atom
D. Chemical Symbol
E. Group
F. Atomic Number
G. Atomic Mass
H. Period
1. Electron
J. Neutron
K. Nucleus
1. Average mass of all the isotopes of that element
2. Series of elements arranged in rows on the periodic table
3 Smallest particle that still can be considered an element
4. Subatomic particle with no charge
5. An abbreviation of an element's name, usually one or two letters
6. Subatomic particles with a positive charge
7.
A small region in the center of an atom
8.
Arrangement of elements showing repeating pattern of their
properties
9. Series of elements arranged in columns on the periodic table
10.
Subatomic particles with a negative charge
11.
Number of protons in the nucleus of an atom
Answer:
this may be wrong and if it is im sorry
A=6
B=8
C=3
D=5
E=9
F=11
G=1
H=2
I=10
J=4
K=7
Adding oil to a table would ___________ the friction when sliding a book across it.
Increase or decrease
Answer:
Increase
Explanation:
Hope it helps you
Answer:
Decrease
Explanation:
If the oil you're referring to is just some normal oil, it'll lessen the friction and cause it to side more smoothly
Chemistry conversion:
Convert 3.0099 dumps to wigs.
6375.23 dumps = 1 wig
Round your answer to 5 sig figs.
dumps and wigs are made up units for this question.
Answer:
0.00047212
Explanation:
Given parameters:
Quantity of dumps = 3.0099 dumps
Unknown:
Amount of wigs in this dumps = ?
Solution:
Since it is given that;
6375.23 dumps = 1 wig
To find 3.0099dumps;
3.0099 dumps = x wigs
6375.23x = 3.0099
x = [tex]\frac{3.0099}{6375.23}[/tex] = 0.00047212 wig
.. Identify how many atoms of each element are in the molecule: H2O2
Answer : There are 2 atoms of hydrogen element and 2 atoms of oxygen element are in [tex]H_2O_2[/tex] molecule.
Explanation:
Molecule : It is the smallest particle in the chemical compound or chemical element that has the same chemical properties of that compound or element.
Atom : It is the smallest unit of matter.
The given molecule is [tex]H_2O_2[/tex].
In the molecule of [tex]H_2O_2[/tex], there are two elements which are hydrogen and oxygen.
In the molecule of [tex]H_2O_2[/tex], there are 2 atoms of hydrogen element and there are 2 atoms of oxygen element.
Hence, there are 2 atoms of hydrogen element and 2 atoms of oxygen element are in [tex]H_2O_2[/tex] molecule.
What type of compound is Sodium hydroxide?
A.acid
B.base
C.element
D.salt
Answer: B: Base
Explanation: I took the test
100 grams of calcium were dropped into 100 grams of water. How many grams of calcium hydroxide would be produced?
Answer:
100
Explanation:
Which lists important roles of coral reefs?
cleaning oil from oceans, protecting beaches, producing oxygen
producing oxygen, offering medical benefits to humans, supporting a variety of organisms
supporting a variety of organisms, cleaning oil from oceans, producing oxygen
offering medical benefits to humans, protecting beaches, supporting a variety of organisms
Answer:
D. offering medical benefits to humans, protecting beaches, supporting a variety of organisms
Explanation:
I took the test and put C and got it wrong and l went back to see what the correct answer as and it was D.
How can you use density to separate mixtures like sand and small plastic pellets?
Answer:
Slide a magnet through the mixture. When you take the magnet off, the iron filings are going to be attracted to the magnet and the sand will stay in the bowl
Explanation:
Answer:
Density can be used to separate the substances that make up a mixture, because each substance in a mixture has its own density. For example, if a mixture of sand and oil is placed in water, the sand will sink to the bottom of the container. The sand is more dense than the water.
Explanation:
Please mark me as brainy if this helps
MULTIPLE CHOICE QUESTION
If
you are warming yourself near the
campfire, you are experiencing heat
transfer from the fire, through:
Convection
Conduction
Radiation
Answer:
radiation
Explanation:
The IUPAC name of(CH3)2CHCH2CH=CH2
Answer:
4-Methyl-1-pentene
Explanation:
According to the International Union of Pure and Applied Chemistry (IUPAC), IUPAC nomenclature of organic chemistry is defined as the system of naming organic chemical compounds.
There are certain rules for naming organic chemical compounds as per IUPAC. The name of given (CH3)2CHCH2CH=CH2 will be based on the same rules.
At first find out the longest continuous chain and number the chain consecutively (preference given to double and single bonds), so numbering will start from right to left. the given chemical is 5 Carbon chain long.Then, identify the groups attached to this chain. Methyl is the only group attached to this chain at 4 Carbon.Assemble the name in alphabetical order using the full name using correct prefix and suffix.4-Methyl-1-pentene is the name of this chemical, as methyl is in 4th carbon position, Pent for 5 carbon chain and -ene (suffix) for one double bond).
Hence, the correct answer is "4-Methyl-1-pentene".
What do tissues combine to form?
A. organisms
B. cells
C.organ systems
D. organs
