Answer:
1.5 × 10²⁴ atoms Mn
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
2.5 mol Mn
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]2.5 \ mol \ Mn(\frac{6.022 \cdot 10^{23} \ atoms \ Mn}{1 \ mol \ Mn} )[/tex] = 1.5055 × 10²⁴ atoms Mn
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
1.5055 × 10²⁴ atoms Mn ≈ 1.5 × 10²⁴ atoms Mn
Worth 40 Points❤ 10th grade chemistry
Answer:
FEGACBDExplanation:
Those are the answers in order, BUT the Goldstein and Rutherford ones are confusing me because Rutherford discovered protons and the nuclear atom. Through my research I also noticed that Goldstein contributed to the discovery of the protons made Rutherford, so I listed him as the one who discovered the proton.
I hope this helps! Have a wonderful night! :D
i need helpppppppppppppppppppppppppppppppppppp
Answer:
A
Explanation:
Carbon dioxide in the air
Answer:
c
Explanation:
it is acidic due to carbon dioxide dissolving into it and forming a weak carbonic acid.
What is the percent yield if 155 grams of calcium carbonate is treated with 250 grams of hydrichloric acid andb142 grams of calciym chloride is obtained
Answer:
375 grams
Explanation:
The percent yield if 155 grams of calcium carbonate is treated with 250 grams of hydrochloric acid and 142 grams of calcium chloride is obtained is 82.55%
What is percent yield?Percent yield is defined as the amount of product actually made compared with the maximum calculated yield. It is the ratio of actual yield to the theoretical yield.
Mass of calcium carbonate = 155 g
Mass of HCl = 250g
Mass of calcium chloride product = 142 g
Moles of calcium carbonate = 155 / 100 = 1.55 moles
Moles of HCl = 250 / 36.5 = 6.85 moles
Mass of calcium chloride = Moles x Molar mass
= 1.55 mole x 111 g/ mole
= 172 g /mole
Theoretical yield = 172 g
Actual yield = 142 g
Percent yield = Actual yield / Theoretical yield x 100
= 142 / 172 x 100
= 82.55 %
Thus, the percent yield if 155 grams of calcium carbonate is treated with 250 grams of hydrochloric acid and 142 grams of calcium chloride is obtained is 82.55%
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PLEASE HELP DUE TODAY !!
What makes up most of an
atom's mass, and where is it located in the atom?
Most hydrogen (H, #1) atoms have a mass of 1. How many electrons would there be in one of these hydrogen atoms? (1 pt)
*
1 point
0
1
2
4
N2 + 3H2, -> 2NH3
If I have 50.6 L of N2 and excess H2, how many liters of NH3 can I produce?
Answer:
C. 101.2 L
Explanation:
N2 + H2= NH3
Balancing it,
N2 + 3 H2 = 2.NH3
(1 mol) (3 mol) (2 mol)
which means
1 molecule of nitrogen reacts with 3 molecule of hydrogen to form ammonia.
Likewise,
50.6 l of nitrogen reacts with 50.6 × 3= 151.8 l of hydrogrn to form 50.6 × 2= 101.2 l of ammonia.
Use the solubility table to predict if a precipitate will form in the double replacement reaction. if yes identify the precipitate.
CuSO4 + 2KOH -> Cu(OH) + K2SO4
Answer:
A precipitate will be formed, it will be Cu(OH)2.
Explanation:
This is due to it's solubility.
There will be a precipitate due the solubility which will be result in the Cu(OH)2 precipitate.
What is double replacement reaction?A double replacement reaction is a chemical reaction in which two reactant and product exchange cations or anions to produce two new products.
Double replacement reactions are also referred to as double displacement reactions or metathesis reactions.
The simplest way to detect a double displacement reaction is to see if the cations exchanged anions with one another.
If the states of matter are mentioned, look for soluble reactants and the creation of a single solid product, as the reaction typically produces a precipitate.
As a result of the solubility, a precipitate will form, resulting in the Cu(OH)2 precipitate.
Thus, this is the result of the reaction.
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How many oxygen atoms are in 5 moles of water H2O molecules?
Answer:
I think 20
Explanation:
Becu of science
PLEASE I NEED HELP!!!Using the table below, identify the unknown material that has a mass of 15,06 g and a
volume of 0.78 mL.
Substance Density (g/cm) Substance
Ice (0°C) 0.917 Human fat
Water (4.0°C) 1.0000 Cork
Gold
1931
Table sugar
Helium (25°C)
0.000 164 Balsa wood
Air (25°C) 0.001 185 Earth
Density (g/cm)
0.94
0.22-0.26
159
0.12
554
Ice
Water
Gold
Helium
O Air
The unknown material : gold
Further explanationDensity is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
Density formula:
[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]
ρ = density
m = mass
v = volume
mass of unknown material : 15.06 g
volume : 0.78 ml
The density of unknown material :
[tex]\tt \rho=\dfrac{15.06}{0.78}\\\\\rho=19.31~g/ml[/tex]
Materials that match the density: gold
Write a caption for a photo of a polluted city.
Answer:
ok
Explanation:
this is a picture of a city that we have made worse everyday
What group would this element be in?
Plz help I need to bring up my grade, this will help bring up my grade !!!!!!!
Answer:
WHY: You can abbreviate an element's electron configuration using the noble gas notation method because when you get down to the lower elements, specifically the d's and the f's, the electron configuration will be very long. The noble gas notation method is a faster answer while also being correct.
HOW: We can abbreviate an element's electron configuration by finding the last noble gas a specific element passed, for example calcium would have just passed Argon. Once you have the "address" of the previous noble gas, then you add on the difference between the element chosen and the noble gas, for example calcium would be [Ar] 4s^2.
Explanation:
which physical method can separate a mixture of steel ball bearings and marbles? boiling evaporation filtration
Steel ball bearings and marbles can be separated through manual sorting due to their difference in appearance.
Before answering the question, let us define the given choices.
The boiling separation technique is used when the boiling points of the components of a mixture are different. It is mostly done for the separation of homogeneous mixtures. The evaporation separation technique is usually used for the separation of a solvent and a soluble solid. Enough heat is provided for the solvent to be evaporated. The process is also slower compared to the boiling separation technique. Filtration is used to separate insoluble solid particles from the liquid. Materials such as filter paper are used in this process.The given separation techniques are not suitable for the separation of steel balls bearings, and marbles. Instead, the sorting separation technique must be used. This is used for manually sorting coarse materials based on their physical characteristic, which in this case is their difference in appearance.
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Consider the unbalanced equation for the oxidation of butene. C4H8 + 6O2 Right arrow. CO2 + H2O For each molecule of C4H8 that reacts, how many molecules of carbon dioxide and water are produced? Group of answer choices 2 CO2 & 2 H2O 4 CO2 & 4 H2O 2 CO2 & 4 H2O 4 CO2 & 2 H2O
what is the longitude of the earth
Answer:
360 degrees
Explanation:
Answer:
longitude is vertical lattitude is horizontal
Explanation:
How many atoms of copper are there in 95.5 moles of copper?
blank x 10 blank
? atoms copper
Answer:
Explanatio≡
6.022
×
10
22
copper atomsn:
Which change of state is shown in the model?
condensation
deposition
boiling
freezing
Answer:
Deposition
Explanation:
The process of deposition is when an object goes from a gas to a solid. In the picture, the first container had a gas (molecules were far apart). In the second, the molecules were tightly packed (a solid).
Hope this helps!
classify the following characteristics and examples of molecules depending on whether they are organic or inorganic.
Organic compounds;
Carbohydrates lipids and nucleic acidscontained in living organisms Molecules that contain carbon and hydrogen bondsInorganic molecules;
Sometimes contain carbon but do not contain C-H bonds Molecules made of a combination of elements Water and table saltsWhat is an organic molecule?An organic molecule are the molecules that contain long chains of carbon and are studied as part of organic chemistry. Inorganic compounds do not contain catenated carbon chains and are studied as part of inorganic chemistry.
Let us now classify the compounds;
Organic compounds;
Carbohydrates lipids and nucleic acidscontained in living organisms Molecules that contain carbon and hydrogen bondsInorganic molecules;
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1 point
2. If a 10.0 L balloon expands to 20.0 L when the pressure is at 2.0 atm,
then determine the final pressure of the balloon as temperature is held
constant
Answer:
1 atmExplanation:
The final pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question we have
[tex]P_2 = \frac{10 \times 2}{20} = \frac{20}{20} \\ [/tex]
We have the final answer as
1 atmHope this helps you
How are a peacock, a jellyfish, and a birch tree similar?
They all share genetic information.
They all contain carbon.
They all reproduce the same way.
They all obtain energy in the same way.
Answer: B
Explanation: intook the test
They all share genetic information as DNA, shaping their unique traits and functions through evolutionary processes.
Option (A) is correct.
The similarity among a peacock, a jellyfish, and a birch tree lies in the fact that they all share genetic information encoded in their DNA. Genetic information is the blueprint that determines an organism's traits, functions, and characteristics. Despite their diverse appearances and habitats, all living organisms, including these three examples, utilize DNA to carry hereditary instructions.
However, it's important to note that while they share genetic information, the way this information is expressed and the specific traits it codes for differ significantly among these organisms due to variations in their evolutionary history, adaptations, and environmental interactions.
This shared genetic foundation underscores the fundamental biological unity among all living beings on Earth, while the unique expression of this genetic information contributes to the incredible diversity of life forms.
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The complete question is:
How are a peacock, a jellyfish, and a birch tree similar?
A) They all share genetic information.
B) They all contain carbon.
C) They all reproduce the same way.
D) They all obtain energy in the same way.
14)
Which of the following is evidence that groundwater causes erosion and deposition?
A)
the formation of meanders
B)
the formation of stalagmites and stalactites in caverns
the formation of alluvial fans
D)
the formation of large boulders in the desert
Answer:
b
Explanation:
A person's blood type is determined by the presence and absence of specific antigens on the cell membrane. Which of these would
you NOT find in someone with type AB blood?
A)
A antigen
B)
B antigen
C)
no antibodies
D)
anti-B antibodies
Answer:
C - no antibodies
Explanation:
I dont think there is any blood type without antibodies
An ecosystem is all the populations of organisms that live together and
A.
the food that they take in as energy.
B.
the organisms that generate energy from sunlight.
C.
the microorganisms that depend on them.
D.
the physical factors with which they interact.
Plllzzzzz help :(
Answer:
D i belive
Explanation:
alculate the molarity of a solution that contains 20.0grams of sodium hydroxide in 200. ml of solution.
The molarity of a solution that contains 20.0grams of sodium hydroxide in 200. ml of solution is 2.3 M.
What is Molarity?Molarity is defined as the ratio of number of moles of solute to the volume of the solution.
Molarity = number of moles of solute/ Volume of solution
Given,
given mass of sodium hydroxide= 20 g
Volume of the solution = 200 mL.
Firstly, we will calculate the moles of sodium hydroxide.
What is Mole?Mole is defined as the ratio of given mass of substance to the molar mass of substance.
Mole = given mass/ molar mass
Molar mass of sodium hydroxide = 40 g
Mole = 20/40
= 0.5 mol
Molarity = (0.5/ 200) × 1000 = 2.5M
Thus, we calculated that the molarity of a solution that contains 20.0grams of sodium hydroxide in 200. ml of solution is 2.3 M.
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The bundle of nerves that connect your brain to your nerves is called
10 points
A. Myelin
B. spinal cord
C. spines
D. neurons
Identify Which two types of subatomic particles are located in the nucleus?
Answer:
protons and neutrons
Explanation:
IN:
Y:
what is the lewis structure
Answer:
Lewis structures, also known as Lewis dot diagrams, Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, are diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. A Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds
Explanation:
What is the compound name of phosphate ?
Answer:
Phosphate, any of numerous chemical compounds related to phosphoric acid (H3PO4).
Which type of volcanic mountain has wide, gentle slopes? rift shield composite cinder cone
Answer:
B- shield
Explanation:
C IS NOT CORRECT.
Edge 2022 ;)
Answer: B shield
Explanation:
Which of the following accurate describes the atmospheric conditions required for the formation of clouds
Answer:
To make a cloud, air needs only to be cooled to saturation and beyond. ... Usually the water vapor amounts in air are less that this amount. When this is the case, we describe the air as being unsaturated. If we add more vapor to such air, we could reach the maximum for the temperature
Explanation:
The atmospheric conditions required for the formation of clouds are , air needs only to be cooled to saturation and beyond formation of clouds and precipitation.
What is precipitation?
Precipitation is defined as any liquid or frozen water which forms in the atmosphere and then gets received on Earth.It is one of the most important steps of the water cycle.
Precipitation takes place in form of clouds when water vapor gets accumulated in clouds and they get bigger and heavy, when the clouds become heavy enough they fall to the land in the form of rain.f a cloud is present at higher altitudes , the water present in the clouds freezes and fall to the ground in form of snow,hail.
Precipitation occurs always in case of fresh water because the sea salt does not evaporate with the water.The different types of precipitation are rain, drizzle,snow,snow hail,etc.
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