Answer:
b) Ar
Explanation:
Given data:
Mass of sample gas = 120.00 g
Volume of gas = 67.2 L
Identity of gas = ?
Solution:
We will calculate the molar mass do identify the sample:
Number of moles of gas:
PV = nRT
1 atm×67.2 L = n×0.0821 atm.L/mol.K×273 K
67.2 atm.L = n × 22.42atm.L/mol
n = 67.2 atm.L / 22.42atm.L/mol
n = 3 mol
Molar mass of gas:
Number of moles = mass/molar mass
Molar mass = 120.00 g/3 mol
Molar mass = 40 g/mol
The given sample of a gas is Ar.
Substances that dissolve in water nd give up OH-ions are considered what
Your answer would be an Arrhenius base
Hope this helps
What does oxygen to do to iron
Please help!!! Thank youuu I’ll give brainlist to first to get them right
questions 3 gravity
question 1 meteorites
question 2 orbit
question 4 rocket and gaseous
Answer:
1. moons 2. orbits 3. gravity 4. rocky, gaseous
Explanation:
Which of these discoveries contradict components of Dalton’s atomic theory?
Dalton's atomic theory was proposed by John Dalton in 1803. It states that elements are made up of indivisible atoms, atoms of the same element are identical, and atoms cannot be created or destroyed.
What is Dalton's atomic theory?Dalton proposed that the concept of atoms might be used to explain the laws of definite proportions and the conservation of mass. In his theory, atoms—which he described as "solid, massy, hard, impenetrable, moving particle(s),"—are the minuscule, indivisible units that make up all matter.
It is significant to highlight that Dalton had no knowledge of the potential existence of interior structure in atoms because he lacked the tools necessary to observe or perform further experiments on individual atoms. In a molecular modeling kit, where the various components are represented by spheres of various sizes and hues, we may imagine Dalton's atom as a component. We now know that atoms are not solid spheres, despite the fact that this paradigm is useful in some situations.
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Which statement describes the rock cycle?
A. A series of processes on Earth's surface and interior that slowly erodes rocks from one kind to another
B. A series of processes on Earth's surface and interior that slowly changes rocks from one kind to another
C. A series of processes on Earth's surface and interior that quickly changes rocks from one kind to another
D. A series of processes on Earth's surface that slowly changes rocks from one kind to another
Answer:
D
Explanation:
it slowly changes rocks or minarials it puts it under pressure and compacks it and it forms a rock for example
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
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
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:
Identify arrows pointing to bonding electrons.
Answers:
Identify arrows pointing to bonding electrons.
✔ a, b, d
Identify arrows pointing to nonbonding electrons.
✔ c
Identify arrows pointing to structures containing sigma bonds.
✔ a, b, d
Identify arrows pointing to structures containing pi bonds.
✔ a
Explanation:
all the parts for those who need it!
these are all correct on edge! <3
Your question is incomplete. Please check below the full content
Identify arrows pointing to bonding electrons
a)✔a, b, d
b)✔ c
c)✔ a, c, b
d)✔ a
Identify arrows pointing to bonding electrons.
✔ a, b, d
Which type of bond is indicated by an arrow?The coordinate covalent bond is shown by an arrow with its head pointing towards the direction of the donation of an electron pair, as shown in Figure 2.
What are 5 examples of covalent bonds?Here are 5 examples of covalent compounds
1 Hydrogen (H2) Hydrogen (H) is the simplest of all elements.
2 Oxygen (O2).
3 Nitrogen (N2).
4 Water (H2O).
5 Carbon Dioxide (CO2).
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Identify Which two types of subatomic particles are located in the nucleus?
Answer:
protons and neutrons
Explanation:
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:
solid zinc reacts with oxide to form zinc oxide
Answer:
2Zn(s) + O2(g)------2Zno
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!
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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somebody please help me!!
Answer:
The given isotope is Br 80
If 35 protons present then its atomic number is 35
Mass number is 80 so its meutrons are 45 because proton+ neutron = mass number
Its electron are 36 because of negative one charge
Explanation:
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:
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
2. What is the mass of 5.3 moles of CaCl2?
Answer:
590 g CaCl₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
5.3 mol CaCl₂
Step 2: Identify Conversions
Molar Mass of Ca - 40.08 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of CaCl₂ - 40.08 + 2(35.45) = 110.98 g/mol
Step 3: Convert
[tex]5.3 \ mol \ CaCl_2(\frac{110.98 \ g \ CaCl_2}{1 \ mol \ CaCl_2} )[/tex] = 588.194 g CaCl₂
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
588.194 g CaCl₂ ≈ 590 g CaCl₂
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
Calculate the moles of 336 L of carbon dioxide gas (CO2) at STP.
Answer:
14.99 mols of CO2
Explanation:
STP= 273 k , 1 atm , .0821 gas constant
N=PV/RT
N= 1x336/.0821x273
14.99 mols of CO2
659.6 grams of CO2
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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How many oxygen atoms are in 5 moles of water H2O molecules?
Answer:
I think 20
Explanation:
Becu of science
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.
Which is the Lewis dot structure for H3PO4?
Answer:A
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:
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:
There are two opposing processes that occur in a solution in contact with undissolved solute. These are dissolving and ________.
Answer:
Two process that occur are dissolving and solvent
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.