Answer:
Ram Ranch
Explanation:
Answer: FLEXUP by lil yacthy and future and playboi carti one of the best songs right now
Explanation:
How many grams of nitrogen monoxide are present if 33.7 L of ammonia and 41.3 L of Oxygen are reacted at 296.3 K and 1.26 atm? What is the enthalpy change for the reaction? NH3(g) + O2(g) -> NO(g) + H2O(l)
Answer:
29.7g of NO are present
Explanation:
With volume, absolute temperature and pressure we can determine moles of ammonia and oxygen that reacts. With these moles we can determine limiting reactant and moles (And mass) of nitrogen monoxide produced as follows:
Moles Ammonia:
PV = nRT
PV/RT = n
1.26atm*33.7L / 0.082atmL/molK*296.3K = 1.748 moles ammonia
Moles Oxygem:
PV = nRT
PV/RT = n
1.26atm*41.3L / 0.082atmL/molK*296.3K = 2.142 moles oxygen
Based on the chemical reaction, 1 mole of NH3 reacts per mole of O2 producing 1 mole of NO.
Thus, limiting reactant is ammonia and moles of NO produced are = Moles of ammonia added = 1.748mol NH3
Mass Ammonia:
1.748mol NH3 * (17g/mol) =
29.7g of NO are presentA single atom with a unique number of protons
Answer:
One atom of that element like helium neon and other Noble gases
Explanation:
Answer:
Please make sure to re-write this on your own so your teacher doesn't think you cheating!Explanation:
The number of protons in the nucleus of an atom determines an element's atomic number. In other words, each element has a unique number that identifies how many protons are in one atom of that element. An example is all hydrogen atoms, and only hydrogen atoms, contain one proton and have an atomic number of 1.
Using Gay-Lussac's Law, calculate what the new pressure in the following situation.
A tank of acetylene sits on the back of a truck. During the afternoon, the temperature
of a gas has reached 38°C (311 K) with a pressure of 508 kPa. That night, the
temperature drops to 29°C (302 K). Since the gas was in a metal tank, the volume
remained constant. What is the new pressure?
Answer: 311kpa
Explanation:
Treatment of (2R,3R)-2,2-epoxy-3-methylpentane with aqueous acid results in a ring-opening reaction. Draw structural formulas for the first and second intermediates in this reaction.
Answer:
Explanation:
In an acid-catalyzed epoxide ring-opening reaction, there is a formation of two intermediate in the reaction. The first stage involves the protonation of oxygen in the epoxide. The stage is followed by the attraction of water molecules onto the more substituted carbon atom in the epoxide ring. The stepwise reaction mechanism can be seen in the image attached below.
what are 3 properties of liquids
Liquids have fixed volume but no fixed shape. ...
Liquids flow from higher to lower level.
Liquids have their boiling points above room temperature, under normal conditions.
Which of the following is an example of pseudoscience?
Biology
Chemistry
Physics
Superstition
Answer:
superstition
Explanation:
The fuel used in many disposable lighters is liquid butane, C4H10 . Butane has a molecular weight of 58.1 grams in one mole. How many carbon atoms are in 1.00 g of butane?
elements x and y are represented as x: atomic number 40, atomic mass 20 and y: atomic number 16 , atomic mass 8 for each of the elements write the electronic configuration using the s,p,d and f notations
Electronic configuration of x will be1s² 2s² 2p⁶ 3s² 3p⁶ 4s² and electronic configuration of y will be 1s² 2s² 2p⁴.
Given,
Atomic number of x = 20
Atomic mass = 40
Atomic number of y = 8
Atomic mass of y= 16
Electronic configuration, sometimes referred to as electronic structure or electron configuration, is the arrangement of electrons in orbitals that surround an atomic nucleus.
A standardized notation is used for expressing electron configurations, in which the energy level and type of orbital are written first, followed by the number of electrons in the orbital. For instance, the electronic structure of carbon, which has an atomic number of 6, is 1s² 2s² 2p².
So, According to the question-
As we already know that atomic number equals number of electrons.
Hence,
Electronic configuration of x = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
Electronic configuration of y = 1s² 2s² 2p⁴
The given question is erroneous , the correct question should be-
Elements x and y are represented as x: atomic number 20, atomic mass 40 and y: atomic number 8 , atomic mass 16 for each of the elements write the electronic configuration using the s, p, d and f notations.
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How do I cook eggs? Please tell me
Calculate 1.4 + 15 + 7.15 +8.003 using the proper number of significant figures. 32 31.55 O 31.550 31.553 31.6
The result of the calculation to the proper number of significant figures will be 31.6.
Addition operation to a proper significant figureThere are certain rules guiding significant figures in mathematical operations.
When it comes to performing an addition or subtraction operation, the significant figure of the final answer takes cognizance of the participating number in the operation with the lowest significant figure after the decimal. The number of significant digits is then applied to the final answer, after its decimal.In division of multiplication operations, the figure with the lowest significant digits determines the significant digits of the final answer.Following the first rule:
1.4 + 15 + 7.15 + 8.003 = 31.553
The participating number with the lowest significant digit after the decimal is 1.4 with just one significant digit. Thus, the final answer would be 31.6.
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Calculate the number of particles in 5.0 grams of NaCl.
Answer:
5.2 × 10²² particles NaCl
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
5.0 g NaCl
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of Na - 22.99 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of NaCl - 22.99 + 35.45 = 58.44 g/mol
Step 3: Convert
[tex]5.0 \ g \ NaCl(\frac{1 \ mol \ NaCl}{58.44 \ g \ NaCl} )(\frac{6.022 \cdot 10^{23} \ particles \ NaCl}{1 \ mol \ NaCl} )[/tex] = 5.15229 × 10²² particles NaCl
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
5.15229 × 10²² particles NaCl ≈ 5.2 × 10²² particles NaCl
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Select all the statements that best describe an atom.
A. contains subatomic particles named the proton, neutron, and electron
B. is the smallest particle of an element that retains its identity in a chemical reaction
C. has no net charge and has a cloud surrounding a dense inner core
D. is the largest particle of an element that retains its identity in a chemical reaction
E. is exactly the same as every other atom and has the same properties
Answer:
a
Explanation:
contains subatomic particles named the proton,neutron and electron
An atom is the smallest particle of a substance that can take part in a chemical reaction. It is composed of subatomic particles.
The statements that best describe an atom are;
contains subatomic particles named the proton, neutron, and electronhas no net charge and has a cloud surrounding a dense inner coreis the smallest particle of an element that retains its identity in a chemical reactionAtoms of elements are the smallest particle of the element. According to the law of conservation of mass, atoms of elements retain their identity in a chemical reaction.
An atom is composed of a massive inner core having neutrons and protons and then a cloud of charge hovering over this dense inner core.
The atom has no net charge because the number of protons and electrons are exactly equal.
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How many molecules are in 5 moles of C10H210?
Answer:
3.0 x 10²⁴molecules
Explanation:
Given parameters:
Number of moles of compound = 5moles
Unknown:
Number of molecules = ?
Solution:
A mole is substance that contains the Avogadro's number of particles;
1 mole = 6.02 x 10²³ molecules
5 moles of the compound will give 5 x 6.02 x 10²³ molecules
= 3.0 x 10²⁴molecules
Determine the mass in grams of 6.63 × 10²¹ atoms of chromium. (The mass of one mole of chromium is 52.00 g.)
Answer:
About 0.573g Cr
Explanation:
What type of bond form ionic bonds
Which is responsible for producing heat and light from the sun?
wind energy
electrical energy
nuclear energy
chemical energy
Answer:
nuclear energy
Explanation:
heat and light is due to release of energy due to nuclear fusion in the sun
Answer:
Chemical energy
Explanation:
A certain rifle bullet has a mass of 6.45 g. Calculate the de Broglie wavelength of the bullet traveling at 1265 miles per hour. Consult the table of physical constants as needed.
The de Broglie wavelength of the bullet travelling at 1265 miles per having a mass of 6.45 g is 6.13 x 10⁻³³ m
De Broglie wavelength is the relation between the momentum and mass of an object. It is inversely proportional to its force. The de Broglie wavelength of an object is given by
λ = h
p
where,
λ = De Broglie wavelength
h = Planck's constant
p = momentum = mass x velocity
First, we will convert velocity fro miles per hour to m s⁻¹
Velocity = 1265 miles per hour
1 mile = 1.60 km
1265 x 1.60 = 2024
It is multiplied by 1 to convert into m s⁻¹
60 x 60
It gives = 16.86 m s⁻¹
Mass is converted from gram to kilogram
m = 6.45 g = 0.00645 kg or 6.45 x 10⁻³ kg
The momentum of bullet is p, which is
p = mv
p = 0.00645 kg x 16.86 m s ⁻¹
p = 0.108 kgms⁻¹
λ = h
p
where,
h is planck's constant = 6.63 x 10⁻³⁴ m²kg⁻¹
p is the momentum = 0.108 kgms⁻¹
λ is the de Broglie wavelength
putting the values,
λ = 6.63 x 10⁻³⁴ m²kg⁻¹
0.108 kgms⁻¹
λ = 6.13 x 10⁻³³ m
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can someone help me with 5-20?
Answer:
15 is the answer your welcome
a solution of AICI is combined with a solution of KOH. Identify the precipitate and the spectator ions in the resulting reactions.
The the precipitate : Al(OH)₃(s)
The spectator ions : 3Cl⁻ and 3K⁺
Further explanationReaction
AlCl₃ + 3KOH → Al(OH)₃ + 3KCl
From solubility rules :
Compounds of OH− are insoluble except Compounds of Li +, Na +, K +, Rb +, Cs +, NH₄⁺ , Sr²⁺, and Ba²⁺
Compounds of Cl−, Br−, I− are soluble except Ag⁺, Hg₂²⁺, Pb²⁺
So the the precipitate : Al(OH)₃(s)
net ionic reaction
AlCl₃ + 3KOH → Al(OH)₃ + 3KCl
Al³⁻+3Cl⁻+3K⁺+3OH⁻⇒Al(OH)₃(s)+3K⁺+3Cl⁻
Remove the spectator : 3Cl⁻ and 3K⁺
Al³⁻(aq)+3OH⁻(aq)⇒Al(OH)₃(s)
A sample of methane, CH4, has a mass of 24.00 g. Calculate the number of methane molecules in the sample.
12 grams of carbon are still present, and 4 grams of hydrogen.
The mass of 6.022 10 23 atoms, molecules, or formula units makes up one mole of a substance, which is known as the molar mass. This value is given in grams per mole. The primary distinction between the two is the fact that molar mass provides the mass of a mole of a certain material. In contrast, molecular weight refers to a substance's molecule's mass.
A mole of CH4 weighs 16 grams.
32 grams is divided by 32 to get 2 moles.
1 mole of CH4 molecules have been eliminated, leaving just 1 mole behind (1 mole = 6.022 1023 gone).
Therefore, 12 grams of carbon are still present, and 4 grams of hydrogen.
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Which two cell components have the same function but for different chemical components?
Question 7 options:
lysosome and peroxisome
vesicles and mitochondria
the Golgi apparatus and the nucleus
ribosomes and mesosomes
The two cell components that have the same function but for different chemical components are lysosome and peroxisome (option A).
What are lysosomes and peroxisomes?Lysosomes are organelles found in all types of animal cells which contains a large range of digestive enzymes capable of splitting most biological macromolecules.
On the other hand, peroxisomes are intracellular organelle found in all eukaryotes which is the source of the enzymes that catalyze the production and breakdown hydrogen peroxide, and are responsible for the oxidation of long-chain fatty acids.
Lysosomes and peroxisomes are two membrane-bound organelles that perform digestive function, however, they differ in the molecules they break down.
Therefore, the two cell components that have the same function but for different chemical components are lysosome and peroxisome.
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cite specific situation that you experienced at home or in school where magnet used to seperate mixtures?
Answer:
See explanation
Explanation:
On a certain day, our teacher came to class with a container having some salt, some sand and a few pieces of iron in it. She was about to introduce a lesson on separation of mixtures.
Then she held a large bar magnet close to the mixture and shook it, the pieces of iron were attracted by the magnet and separated from the mixture.
Next, she poured some water into the mixture and the salt dissolved. She got a filter paper and separated the solution from the sand.
Then she heated the solution to dryness in an open crucible and the salt was recovered.
A soda bottle is flexible enough that the volume of the bottle can change even without opening it. If you have an empty soda bottle (volume 591 mL) at room temperature (20 degrees Celsius), what will the new volume be if you put it into a freezer (-4.0 degrees Celsius)?
The new volume = 542.6 ml
Further explanationCharles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
V₁=591 ml
T₁=20+273=293 K
T₂=-4+273=269 K
[tex]\tt V_2=\dfrac{V_1.T_2}{T_1}\\\\V_2=\dfrac{591\times 269}{293}\\\\V_2=542.6~ml[/tex]
If the equilibrium constant of a given reaction is 8.24, what is the equilibrium constant of its reverse reaction
Answer:
0.121
Explanation:
for reverse reaction use the receprocal of 8.24
What is the volume in cubic millimeters of a 3.54 carat diamond, given that the density of diamond is 3.51 g/mL? (1 carat = 200 mg)
The volume in cubic millimeters of a 3.54 carat diamond, given that the density of diamond is 3.51 g/mL is 0.202mL.
How to calculate volume?The volume of a substance can be calculated by dividing the mass by the density of the substance. The formula is as follows:
Volume = mass ÷ density
According to this question, a 3.54 carat diamond has a density of diamond is 3.51 g/mL. The volume is calculated as follows:
Since 1 carat = 200 mgThen, 3.54 carat = 708milligrams708 milligrams is equivalent to 0.708grams
Volume = 0.708g ÷ 3.51g/mL
Volume = 0.202mL
Therefore, the volume in cubic millimeters of a 3.54 carat diamond, given that the density of diamond is 3.51 g/mL is 0.202mL.
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Pancake syrup has a density of 1.37 g/cm³. A student measures the density of
pancake syrup in the laboratory and obtains a value of 1.42 g/cm³. The students
percent error is
percent.
Hint: You need to apply the significant figure rule for subtraction first; then apply
the significant figure rule for division. Do not round until the end!
Enter your answer as number without a unit. (Example: 2; 2.1; 2.20)
Percentage error is defined as the difference between estimated value and the factual value in the comparison to the factual value and is expressed as a chance.
In other words, the percent error is the relative error multiplied by 100.
Formula of the percentage error :
δ = | actual value - expected value / expected value | × 100 %
Now,
Value obtained in the laboratory, actual value = 1.42 g/cm
Expected value of syrup, expected value = 1.37 g/cm
% error = 1.42 - 1.37 / 1.37 * 100 %
= 1.036 - 1 * 100 % { rounding off }
= 1.04 - 1 * 100 %
= 0.04 * 100 %
= 4 %
% Error = 4 %
Hence, the student % error is 4 % error
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The heat of vaporization for ethanol is 0.826 kJ/g. Calculate the heat energy in joules required to boil 94.15 g of ethanol.
Answer:
The heat energy required to boil 94.15 g of ethanol is 77.7679 kJ.
Explanation:
The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three.
If the relationship between the magnitudes is direct, the following formula must be followed:
a ⇒ b
c ⇒ x
Then: [tex]x=\frac{c*b}{a}[/tex]
It is called "heat of vaporization" to the energy necessary to change 1 gram of substance in solid state, to liquid state, without changing its temperature. In this case, the heat of vaporization of ethanol is 0.826 kJ / g, that is, 0.826 kJ of energy is required to change 1 gram of substance from solid state to liquid state. The thermal energy required to boil 94.15 g of ethanol can be calculated using the following rule of three: if 0.826 kJ is required to change 1 gram of ethanol, to change 94.15 grams, how much energy does it require?
[tex]energy=\frac{94.15 grams*0.826 kJ}{1 grams}[/tex]
energy= 77.7679 kJ
The heat energy required to boil 94.15 g of ethanol is 77.7679 kJ.
The heat energy in joules required to boil the ethanol is 77.77 kJ.
The given parameters;
heat of vaporization for ethanol = [tex]\Delta H_{vap}[/tex] = 0.826 kJ/gmass of the ethanol, m = 94.15 gThe heat energy in joules required to boil the ethanol is calculated as follows;
[tex]Q = m\times \Delta H_{vap}[/tex]
Q = 94.15 x 0.826
Q = 77.77 kJ
Thus, the heat energy in joules required to boil the ethanol is 77.77 kJ.
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Substance
Specific Heat Capacity
0.290 J/g • °C
Sand
Aluminum
0.902 J/g • °C
Iron
Silver
0.444 J/g • °C
0.240 J/g • °C
0.129 J/g • °C
Gold
1. If 750 g of iron absorbs 22,000 joules, what will the change in temperature be?
Answer:
ΔT = 66.06°C
Explanation:
Given data:
Mass of iron = 750 g
Heat absorbed = 22000 j
Change in temperature = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
specific heat capacity of iron is 0.444 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
By putting values,
22000 j = 750 g × 0.444 J/g.°C × ΔT
22000 j = 333 J/°C × ΔT
ΔT = 22000 j /333 J/°C
ΔT = 66.06°C
Which statements are true of the electron cloud model? Check all that apply. It is also known as the planetary model. It is considered the modern atomic model. It describes the probable locations of the electrons. It describes the specific locations of the electrons.
Answer:
-It is considered the modern atomic model.
-It describes the probable locations of the electrons
Explanation:
edge 2020
The correct answer is:
It is considered the modern atomic model. It describes the probable locations of the electrons.The electron cloud model is another name used to describe the modern wave mechanical model of the atom.
It is the atomic model introduced by Erwin Schrodinger in 1927 based on the principles of quantum mechanics. It was an advancement over the Bohr model of the atom.
In this model, the atomic orbital is described as a region in space where there is a high probability of finding an electron. Hence, the electron is not found in specific orbits according to the Bohr model, rather, we describe the probability of finding the electron. This is the contemporary approach to the study of atomic structure.
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