Answer:
People wanted to settle there because it had good living conditions. There was rich soil, and lots of water sources.
I hope this helps!
4 Na + O2 → 2 Na2O
6.79 moles of O2 will react to form how many moles of Na2O?
Answer:
13.94moles of Na₂O
Explanation:
The balanced reaction expression is given as:
4Na + O₂ → 2Na₂O
Given parameters:
Number of moles of O₂ = 6.97moles
Unknown:
Number of moles of Na₂O
Solution:
To solve this problem;
1 mole of O₂ will produce 2 moles of Na₂O ;
6.97 moles of O₂ will produce 6.97 x 2 = 13.94moles of Na₂O
Which compound below has the highest iron content?
Feo
FeCl2
FeSO4
Fe(OH)2
ANSWER:
Fe(OH)2
Explanation:
Fe(OH)2
The highest iron content.
A compound is a substance that consists of the atoms or the ions of the two or more different elements that are joined by a chemical bond and can't be separated by any physical means. Like water is a compound of oxygen and hydrogen.
This the answer is Fe(OH)2.
The highest iron content of the iron is the second iron hydroxide, and it is an inorganic compound that makes salts from a compound of iron sulfate. Has white sold traces of oxygen which gives it a greenish tint. It can be seen in its mineralogical forms as a form of green rusting.Hence the option D is correct.
Learn more about the compound below.
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why do boys my age not like me ?
Answer:
Because boys are overrated
Explanation:
Answer:
id.k, I've been asking myself the same thing.
Explanation:
-_-
The reaction between gallium bromide and sodium sulfite will yield ___ ?
Answer:
An equation for a chemical reaction in which the number of atoms for each element in the ... sulfide: 8 Fe + S8 ---> 8 FeS o _____ DECOMPOSITION _____: Definition - A single ... Hydrogen peroxide will produce water and oxygen gas if left in sunlight. (a) ... Sodium oxide reacts with carbon dioxide to form sodium carbonate.
sorry if wrong:(
Explanation:
The sum of the atomic masses for any compound is the compound’s:
Empirical mass
Compound mass
Atomic mass
Molar mass
which cycle results in death of the host cell
A.lytic cycle
B.lysogenic cycle
C.both
Answer:
A. lytic cycle is the correct answer
Something that is made out of natural resources for human use is called
Answer:
Man-made resources
Explanation:
Humanized resources are items or substances that have value to human lives that do not occur in the natural world. Examples of man-made resources include plastic, paper, soda, sheet metal, rubber and brass. These contrast with natural resources, such as water, crops, sunlight, crude oil, wood and gold.
how do the structures of particles in substances vary?
Answer:
56
Explanation:
How many formula units are present in 25.0 mol of sodium chloride
25 x 6.022 x [tex]10^{23}[/tex]formula units are present in 25.0 mol of sodium chloride.
What are moles?A mole is defined as 6.02214076 × [tex]10^{23}[/tex]
of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
One mole of NaCl contains 6.022 x [tex]10^{23}[/tex] NaCl formula units.
25.0 mol of sodium chloride contains 25 x 6.022 x [tex]10^{23}[/tex].
Hence, 25 x 6.022 x [tex]10^{23}[/tex]formula units are present in 25.0 mol of sodium chloride.
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The number of formula units are present in 25.0 mol of sodium chloride is 25 x 6.022 x 10 ²³ formula units of sodium chloride.
What is formula Units ?A formula unit in chemistry is the empirical formula of any ionic or covalent network solid compound used as an independent entity for stoichiometric calculations.
It is the lowest whole number ratio of ions represented in an ionic compound.
Hence, The number of formula units are present in 25.0 mol of sodium chloride is 25 x 6.022 x 10 ²³ formula units of sodium chloride.
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The diagram illustrates the water cycle.
Parts of the water cycle labeled U through Z. U: Water moving from a lake into the clouds. V: Clouds. W: Water falling from clouds as rain and snow. X: Water moving from ground to the clouds. Y: Water flowing down the mountainside into a lake. Z: Underground water going into lake.
Which process occurs at location W?
precipitation
evaporation
condensation
transpiration
Answer:
The Answer is Precipitation
Explanation:
Look it up on and then also got it right on the Unit Test and the Quiz.
The diagram illustrates the water cycle, the process that occurs at location W is precipitation. The correct option is a.
What is precipitation?Precipitation is any product of the condensation of atmospheric water vapour that falls under gravitational pull from clouds. The main forms of precipitation include drizzle, rain, sleet, snow, ice pellets, graupel and hail.
Precipitation occurs when a portion of the atmosphere becomes saturated with water vapour so that the water condenses and precipitates or falls. Thus, fog and mist are not precipitation but colloids, because the water vapour does not condense sufficiently to precipitate. Two processes, possibly acting together, can lead to air becoming saturated: cooling the air or adding water vapour to the air. Precipitation forms as smaller droplets coalesce via collision with other raindrops or ice crystals within a cloud. Short, intense periods of rain in scattered locations are called showers.
Precipitation is a major component of the water cycle and is responsible for depositing the fresh water on the planet.
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What is a poverty line?
Consider the reaction and the rate law below.
2O3 → 302
R= k[03]2
What is the overall order of the reactants in this rate law?
A. 0
B. 1
C. 2
D. 3
The overall order of the reactants in this rate law : 2
Further explanationGiven
Reaction
2O3 → 302
The rate law :
R= k[03]²
Required
The overall order
Solution
The overall order : the sum of orders for each reactant
For A + B ---> C + D
r = k [A]ᵃ[B]ᵇ
The overall reaction order is m+n
So for the rate law of R= k[03]², the overall order = 2
6. An unknown compound is analyzed and found to consist of 49% carbon, 2.7
% hydrogen, and 48.2 % chlorine. If the molecular mass of the compound is 150,
what is the molecular formula of the compound?
Answer:
Molecular formula = C₆H₄Cl₂
Explanation:
Given data:
Percentage of hydrogen = 2.7%
Percentage of carbon = 49%
Percentage of chlorine = 48.2%
Molar mass of compound = 150 g/mol
Molecular formula = ?
Solution:
Number of gram atoms of H = 2.7 / 1.01 = 2.67
Number of gram atoms of Cl = 48.2 / 16 = 1.36
Number of gram atoms of C = 49 / 12 = 4.08
Atomic ratio:
C : H : Cl
4.08/ 1.36 : 2.67/1.36 : 1.36/1.36
3 : 2 : 1
C : H : Cl = 3 : 2 : 1
Empirical formula is C₃H₂Cl.
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass = 12×3 + 1.01 ×2 + 35.5 = 73.52 g/mol
n = 150 / 73.52
n = 2
Molecular formula = n (empirical formula)
Molecular formula = 2 (C₃H₂Cl)
Molecular formula = C₆H₄Cl₂
What is the relationship between a front and cloud formation?
Answer:
Weather fronts can cause clouds to form. Fronts occur when two large masses of air collide at the Earth's surface. Warm fronts produce clouds when warm air replaces cold air by sliding above it.
Explanation:
CuSO4 +
KI →
Cul +
12 +
K2SO4
Dylan is completing an experiment in science class. The teacher gave Dylan a raw egg that had the shell removed. The egg is surounded by a membrane. Dylan gently placed the egg into a solution. Below is a diagram of the concentration of water molecules in the egg and in the solution.
Based on the diagram, what will happen to the egg?
A.
It will shrink because water molecules will move out of the egg until all the water molecules are in the solution.
B.
It will swell because water molecules will move into the egg until the concentrations are equal.
C.
It will swell because water molecules will move into the egg until all the water molecules are inside the egg.
D.
It will shrink because water molecules will move out of the egg until the concentrations are equal. HELPPPPPPPPPPPPPPPPPP PLS
Answer: AA
Explanation:
What is the kinetic energy of a 9 kg object moving at a velocity of 5 m/s?
how many
moles are in 9.01 x 1023 molecules of water. answer should be rounded to three significant figures.
A. 1.50
B. 15.0
C. 0.150
D. None of the above
Answer:
A. 1.50
Explanation:
9.01 x 1023 molecules* 1 mol/ 6.022×1023 molecules= 1.49618067087 moles
Rounded would be 1.50
(100 points) Imagine that the ability to cool materials down to below 200 K (–100° F) was not discovered until 1950. Which technology would that have most impacted?
electromagnetism
crystallography
metallurgy
superconductivity
Answer: (D) Superconductivity
Explanation: Edge 2021
Answer:
D
Explanation:
got it right. :)
Which of the following statements best explains how the first generation 20 points
lady beetle from the above model changed in the later generations? *
Lady Booties
蒙赖隊徽
Finn
Gameretlen
Later
Genovation
In the first generation, the beetles with the dark spotted trait had a better chance of
survival. The beetles changed their color to better adapt to their environment, and the
species evolved to have a lighter color.
In the first generation, the beetles with the dark spotted trait had a better chance of
survival. The trait mutated over time, causing the beetles with that trait to be darker,
and the species evolved to have a darker color.
In the first generation, the beetles with the dark spotted trait had a lower chance of
sury The trait mutated over time, causing the beetles with that trait to be lighter,
and the species evolved to have a lighter color.
In the first generation, the beetles with the dark spotted trait had a lower chance of
survival. The beetles changed their color to better adapt to their environment, and the
species evolved to have a lighter color.
Answer:
In the first generation, the beetles changed to have light spots. The beetles with the light spotted trait had a better chance of survival causing the species evolved to have lighter spots.
Answer:
In the first generation, the beetles with the dark spotted trait had a better chance of survival. The trait mutated over time, causing the beetles with that trait to be darker.
Explanation:
In the picture that I had, it shows that some of the beetles in the first generation started to develop spots on their back or wings. It shows that later down the line, their backs start to get even more darker which means that is must be a trait that mutated over time that would allow the beetles with that trait to be significantly darker. They can't just change their traits if they want to so it would have to be something like mutation that caused it.
What does the large number in front of
the molecule represent?
True or False? When a gas condenses to a liquid it absorbs heat from its
surroundings.
1.True
2.False
Answer:
True
Explanation:
because it never stops doing it
Which two subatomic particles have an equal, but opposite charge?
Answer:
Electrons have a negative charge. The charge on the proton and electron are exactly the same size but opposite. Neutrons have no charge. Since opposite charges attract, protons and electrons attract each other.Hope that helps
Explanation:
Please help!!! How many moles are in 4.87x1024 atoms of Mg
Help please!! I'll name you brainliest!!
Answer:
magesium di chloride
Explanation:
it has one magnesium and 2 chlorines
Answer:
Magnesium Chloride
is aluminum intensive or extensive
Answer:
Intensive
Explanation:
Aluminium is an Intensive Metal
#HopeItHelps
PLEASE ANSWER BY 9:00pm PT
“A person takes in a breath of 450.0 mL air at 756 mmHg and -10.0°C. Assuming that amount and pressure remains constant, what is the volume of air when it warm to body temp (37.0°C)? (Convert °C to Kelvins (+273))”
- my chem teachers question
The given answer is 58.9 mL
I didn’t know how to get to that conclusion
And I have to show my work
Answer:
thanks to all the mortal those who are born must die one day that it cut in cannot be avoided as ripe fruit fall of the tree so it is common to all the mortal those who are born must die one day that it cut
Explanation:
silghjnb bj i bb b nv bv hc U and lamenting produce a few of the tree so much for your time is common to both of us ☺️ to all the said that death of the tree so it cut in cannot be avoided as well as well but the mortal Kombat X the said
transfer of energy by electromagnetic -science question
A.conduction
B.convection
C.radiation
D.reflection
Answer:
B. convention
Explanation:
hope you get the right answer
is a cellphone made from renewable resources *
Answer:
Mobiles are made from many non-renewable materials which have been extracted from the earth – such as: Metals. Plastics.
Explanation:
Answer: they are made from many metals,plastics. etc...
Explanation:
they also aren't bio-degradeable so they're also harmful for the environment.
Which of the following statements does not describe a physical property of chlorine?
O The color of chlorine gas is green.
O The density of chlorine gas at standard temperature and pressure is 3.17 g/L. OChlorine combines with sodium to form table salt.
O The freezing point of chlorine is -101°C.
Answer:
the chlorine gas is green
Explanation:
the density of
Therefore, the first option A is correct.
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