Answer:
b) 3.000 mol S
Explanation:
using Avogadro's constant
1 mol = 6.02 × 10^23 atoms
we need to find the number of moles for 1.806 × 10^24
x = 1.806 × 10^24
putting it together we now have:
1 mol = 6.02 × 10^23 atoms
x = 1.806 × 10^24
cross multiply
6.02 × 10^23 x = 1.806 × 10^24
divide both sides by 6.02 × 10^23
x = (1.806 × 10^24) ÷ (6.02 × 10^23) = 3 mol
An atom X has 2 electrons in its outer orbit. What will it do to form a stable ion?
Answer:
In a neutral molecule, the sum of the bonding valance electrons must be equal. So the products of the negative element and its charges and the positive element and its charge must be equal.
Explanation:
C1×N1 = C2×N2
If we have a 3 valance electrons , the 'A' charge will be either +3 or -5 for a full octet and valance electron in 'B' atoms will mostly result in acquisition of additional electrons (2) for an octet and relative charge of -2.
Balancing the two,
3 × A = -2 × B
To be equal, A = 2 and B = 3
Therefore, A²B³
SOS PLEASE HELP ME
_____ is (are) made of more than one atom.
A. A molecule
B. Protons
C.Neutrons
D. An element
Determine the amount of mols in 1.50 X 10^23 atoms of Cl2.
0.249 moles
Explanation:
Given:
No. of atoms= 1.50 X 10^23 atoms
NA= 6.022 X 10^23 atoms
To Find:
Moles= ?
Solution:
Mole = No. of atoms/NA
= 1.50 X 10^23/6.022 X 10^23
= 0.249 moles
how can we save our planet from pullution?
Answer:
by using electric cars
Explanation:
nice to see theres another emily yoder on here?
Answer:
We can start by replacing all non-renewable sources with renewable source to prevent harm of land and pollution. Then we can go to solar/energy powered machine instead of coal and oil which is harming our system by harvesting and throwing away.
Explanation:
Question 6 of 10
Identify the correctly written chemical reaction.
A. Reactant + Reactant = Product
B. Reactant + Product → Reactant + Product
C. Product + Product → Reactant + Reactant
D. Reactant + Reactant → Product + Product
SUB AT
8.50g of CuO when heated in a current of dry hydrogen gas gave 6.58g of copper and 2.16g of wate Calculate the proportion of oxygen to hydrogen by mass in water.
The proportion of oxygen to hydrogen by mass in the water is 8 : 1
Data obtained from the question Mass of CuO = 8.50 gMass of Cu = 6.58 gMass of water = 2.16g Proportion =? How to determine the mass of O in water 1 mole of water (H₂O) = (2×1) + 16 = 18 gMass of O in water = 16 g
18 g of water contains 16 g of O.
Therefore,
2.16 g of water will contain = (2.16 × 16) / 18 = 1.92 g of O
How to determine the mass of H in water Mass of water = 2.16 gMass of O in water = 1.92 gMass of H =?Mass of H = mass of water – mass of O
Mass of H = 2.16 – 1.92
Mass of H = 0.24 g
How to determine the proportion of oxygen to hydrogenMass of O = 1.92 gMass of H = 0.24 gProportion =?Proportion = oxygen / hydrogen
Proportion = 1.92 / 0.24
Proportion = 8 : 1
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Identify and describe the three ways that mutations affect organisms?
Answer:
The ways that mutation can affect an organism include:
Changing the physical characteristics of the organism.
It can impact the way that the DNA is able to code the genetic information.
Also, mutation can lead to the death of an organism.
What is mutation?
Mutation simply means a change in the DNA sequence of an organism. It can result from DNA copying mistakes that were made during the cell division.
Mutation can affect an organism as it changes the phenotype of the organism. It can also impact the way that the DNA is able to code the genetic information and lead to the death of an organism.
Changes in temperature, pressure, and volume affect the behavior of gases more than they affect solids and liquids. _______________
Answer:
This statement is correct.
Explanation:
When the temperature of a gas is decreased, gas converts into liquid state but when a high pressure is applied on a gas , it also converts into liquid state.
If we lower the temperature of a gas, the particles of the gas loose all the kinetic energy and become less movable. Due to this all the particles of the gas come more close to each other and get condense on any solid surfaces and becomes liquid.
For example, water vapours get condense on the surface of a cold drink bottle when these water vapours get in contact with the cool surface of the bottle.
If we apply the high pressure on a gas, all the particles come very close to each other and become dense and changes into liquid.
How many moles are in 20.0 g of water
A runner wants to run 11.7 km. Her running pace is 8.0 mi/hr. How many minutes must she run?
Answer:
8 mi = 12.875 km
12.875 /60 m
= 0.21458 km / min
11.7 / 0.21458 = 54.52 min
If 2.80 moles of H₂ and 1.55 moles of O₂ react how many moles of H₂O can be produced in the reaction below?
2 H₂(g) + O₂(g) → 2 H₂O(g)
According to reaction
2 moles of H2 and 1 mol of O_2 produces 2 mol H2O3 mols of reactants produces 2 moles of H_2O1 mol of reactants produces 2/3=0.6 mol.of H_2OMols of reactants=2.8+1.55=4.35Mols of H_2O
[tex]\\ \tt\rightarrowtail 4.35(0.6)[/tex]
[tex]\\ \tt\rightarrowtail 2.61mol[/tex]
According to law of conservation of mass, 4.35 moles of water are produced when 2.80 moles of hydrogen and 1.55 moles of oxygen react.
What is law of conservation of mass?According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.As 2.80 moles of hydrogen react with 1.55 moles of oxygen 2.80+1.55=4.35 moles of water are produced.
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How do birth and death rates affect a population size?
Answer:
When the death rate is higher than the birth rate, the population decreases. It increases when the opposite happens.
Explanation:
How to write 21,000,000 in scientific notation
____ x 10 blank
Answer: [tex]2.1 * 10^7[/tex]
Explanation: To find things in scientific notation you basically just move the decimal point so that the number is in the one's place. The exponent is the number of times you moved the decimal place. Ex. 0.000003467 would be 3.467 * 10^-6 because you moved the decimal point six times to the right.
Who is considered the boss of the water cycle?
will mark brainliest
Answer: The sun
Explanation:
its the real boss of the water cycle, and it doesn't even live here on Earth. The sun provides heat, or energy, which is what makes the water cycle work. The sun's heat allows water to change forms from liquid to gas to ice and back again.
Image included
At constant pressure which graph shows the correct relationship between the volume of a gas (v) and its absolute temperature (t)?
Answer:1
Explanation:cause castle told me
What is fire and how does it work
Answer:
Fire is the result of applying enough heat to a fuel source, when you've got a whole lot of oxygen around. As the atoms in the fuel heat up, they begin to vibrate until they break free of the bonds holding them together and are released as volatile gases. These gases react with oxygen in the surrounding atmosphere.
Explanation:
what is skelation system
sǝuoq ɹnoʎ ɟo llɐ
Explanation:
Answer:
Your body's frame work.
Explanation:
What keeps you standing.
If you jump on New Year’s Eve, then you will get tall.
A. a good hypothesis
B. hypothesis needs improvement
Which time period saw the rise of small invertebrate life and fungi?
I hope it will help you !!!
Answer:
the Paleozoic Era
Explanation:
64.064 grams of bromine gas, Br2 would occupy how many liters at stp?
This problem is providing us with the mass of bromine gas as 64.065 g so the volume it occupies at STP is required. After the calculations, the result turns out to be 8.96 L.
Ideal gas law:In chemistry, we use gas laws in order to comprehend the volume-temperature-mole-pressure behavior of gases. In this case, we refer to the ideal gas law as all of the aforementioned variables are taken into account:
[tex]PV=nRT[/tex]Thus, since STP stand for standard pressure and temperature, 1 atm and 273 K respectively, one must first calculate the moles of bromine gas to subsequently get the volume as follows:
[tex]n=64.064g*\frac{1mol}{159.8g} =0.40mol\\\\V=\frac{nRT}{P} \\\\V=\frac{0.40mol*0.08206\frac{atm*L}{mol*K}*273K}{1atm}\\ \\V=8.96L[/tex]
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A liter of 2M NaOH solution contains how many grams of NaOH?
Na(OH)2
Explanation:
look for the charges to the periodic table
The Percentage of salt-water vs. fresh-water:???%
Answer:
Over 96 percent is saline. Of total freshwater, over 68 percent is locked up in ice and glaciers. Another 30 percent of freshwater is in the ground.
What type of compound is CH 3-CH 2-CH 3?
Answer:
alkane
Explanation:
Tropical rain forests are being cut down to create farms and pastures, and to harvest trees for construction. What has this type of deforestation increased?
fertilizers.
microorganisms.
soil erosion.
soil moisture.
The deforestation of tropical rainforest trees to create farms and pastures, and to harvest trees for construction has increased soil erosion.
WHAT IS DEFORESTATION:Deforestation is the process whereby trees are cut down for commercial purposes e.g. lumbering for paper production. Rainforest is a vegetation characterized by trees and shrubs. However, these trees serve as soil cover and help prevent soil erosion.This means that deforestation of tropical rainforest trees to create farms and pastures, and to harvest trees for construction has increased soil erosion
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Please answer quick
According to the Environmental
Protection Agency (EPA), what
minimum level of decibels over a
24-hour period is considered the
maximum exposure for humans
to avoid hearing loss?
A. 70
B. 15
C. 90
D. 5
Answer:
It will be D
Explanation:
When you see or visit grasslands, what do you know about the climate? (Select all that apply.)
They have a lot of precipitation.
They have mild to hot summers.
They have little precipitation.
They have cold winters.
When you see or visit grasslands you know that :
They have mild to hot summers ( B )They have a lot of precipitation ( A )Grassland vegetationGrasslands are a type of vegetation found mostly in areas with favourable weather conditions such as mild summers and right amount of precipitation which provides the grasslands with enough water for proper growth.
Other types of vegetation include :
Forest vegetationTundra and Desert vegetationDesert vegetation expreciences very hot summers and little precipitation which leads to the scarcity of green vegetation, while forest vegetation expreciences a very high level of precipitation.
Hence we can conclude that When you see or visit grasslands you know that :They have mild to hot summers ,They have a lot of precipitation
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Answer:
They have little precipitation.
They have cold winters.
They have mild to hot summers.
what intermolecular forces are in c2h5nh2?
This problem is asking for the intermolecular forces in ethanamine, C₂H₅NH₂. Hence, after analyzing it, we find they are both London dispersion forces and hydrogen bonding.
Intermolecular forcesIn chemistry, intermolecular forces are the responsible of holding molecules together both in liquids and solids, and they depend on the type of bonds exhibited by the molecule. In this case, ethanamine:
[tex]CH_3-CH_2-NH_2[/tex]
Has C-C, C-H, C-N and N-H bonds. Now, C-C, C-H and N-H are strongly nonpolar as they have an electronegativity difference below 0.7, which means ethanamine has London dispersion forces as the weakest ones.
In addition, the presence of N-H bonds, provides this molecule with stronger intermolecular forces, hydrogen bonding, which occur in N-H and O-H bonds.
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If the pressure is 0.9 kPa. and the volume is 4.0L, then the pressure changes to 0.20 kPa. What is the new volume?
Answer:
18 L
Explanation:
boyles law
P1V1 = P2V2
V2 = P1V1/P2
V2 = (.9 * 4)/.2
V2 = 18
This question is based on Boyle's law as temperature is constant. Boyle's law is derived from ideal gas equation only at constant temperature. Therefore, the new pressure is 18L.
What is Boyle's law?Boyle's law is a law which states that at constant temperature, the pressure that is exerted by an ideal gas on the walls of the container is inversely proportional to the volume occupied that gas.
Ideal gas is a gas where there is no forces of attraction or forces of repulsion between the particles . The volume of container is equal to the volume occupied by the gas.
Mathematically, Boyle's law can be written as
P₁V₁ = P₂V₂
P₁=initial pressure
P₂=final pressure
V₁ = initial volume
V₂=final pressure
V₂ = P₁V₁/P₂
V₂ = (0.9 × 4)/0.2
V₂ = 18L
Therefore, the new volume is 18L.
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How many significant figures are in 463.8052
Answer:
it has 7 significant figures
Explanation: hope this helps<3
(GIVING OUT BRAINLIEST!)
Identify and describe the different forms of precipitation shown in the images.
Answer: Both images seem to represent hail and ice, these conditions are only brought by chilly temperatures and rain.
