Answer:
molecular mass = 78
Empirical Formula is
C= 92.3/12= 7.69
H= 7.68/1= 7.68
therefore Empirical formula is
CH
molecular formula is
(CH)n= 78
(12+1)n=78
n=78/13
n=6
molecular formula is
C6H6
for the following pairs of elements, identify the element that would be expected to be more electronegative based on periodic tables
Answer:
Chlorine (Cl)
Explanation:
Bromine: 2.96 electronegative
Chlorine: 3.16 electronegative
3.16 > 2.96
Hope this helps!!
It takes 41.72 J to heat a piece of gold weighing 18.69 g from 10.0 C to 27.0 C. What is the specific
heat capacity of the gold?
Answer:
s = 0.131 J/g⋅∘C
Explanation:
The amount of heat (q) absorbed by gold could be expressed as:
in what environments does low pressure/high temperature metamorphism occur?
Answer:
High- pressure/low-temperature (HPLT) metamorphism is believed almost exclusively to occur at such cool conditions inside the convergent plate margins.
Explanation:
Hope it helps:)
maple syrup physical property description
-
-
-
-
-
Answer:
Maple syrup has nutraceutical potential given the macronutrients (carbohydrates, primarily sucrose), micronutrients (minerals and vitamins), and phytochemicals (primarily phenolics) found in this natural sweetener.
Explanation:
HELP PLSSSS!!!!!!!!
Using what you can recall from this unit, write one or two short paragraphs describing Ernest Rutherford's
atomic model. If needed, you may search the Internet for descriptions of the model.
Answer:
Ernest Rutherford's atomic models the basis of our understanding of atoms. The model describes the atom as a tiny and dense with a positively charged core called a nucleus with neutral subatomic particles called neutrons. The model includes negative-charged subatomic particles called electrons that orbit the nucleus.
Ernest Rutherford and his fellow scientist created an experiment in which they bombarded very thin sheets of gold foil with fast moving alpha particles. Alpha particles are a type of radioactive particles that are positively charged. During their time, the current atomic model showed that an atom’s mass and charge are uniformly distributed throughout the atom. Using that model, they expected that the alpha particles would pass through the gold foil with slight deflection or even none at all. While the experiment did show that they were undeflected, they were surprised to see that a small amount bounced of the the foil a large angles.
This experiment led Rutherford to conclude that the particles that were highly deflected must have experienced powerful enough force within the atom to be deflected. He concluded that all of the positive charges and the majority of the mass of the atom must be condensed in a very small space in the atom’s interior, which he called the nucleus. In the nuclear model, the proton and neutrons are in the nucleus, the center of the atom. Electrons a distributed throughout the atom, orbiting the nucleus.
I hope you understand! :)
Ernest Rutherford's model describes the atom as a tiny and dense with a positively charged core called a nucleus with neutral subatomic particles called neutrons. The model includes negative-charged subatomic particles called electrons that orbit the nucleus.
Ernest Rutherford and his fellow scientist created an experiment in which they bombarded very thin sheets of gold foil with fast moving alpha particles. Alpha particles are a type of radioactive particles that are positively charged. During their time, the current atomic model showed that an atom’s mass and charge are uniformly distributed throughout the atom. Using that model, they expected that the alpha particles would pass through the gold foil with slight deflection or even none at all. While the experiment did show that they were undeflected, they were surprised to see that a small amount bounced of the the foil a large angles.
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Asap help for Branlist
Answer:
NONE OF THE ABOVE
Explanation:
Answer:
its None of the above.
Explanation:
Why does ammonia gas diffuse faster than hydrogen chloride gas?
A) Ammonia has a higher boiling point than hydrogen chloride.
B) Ammonia is a base, hydrogen chloride is an acid.
C) The ammonia molecule contains more atoms than a hydrogen chloride molecule.
D) The relative molecular mass of ammonia is smaller than that of hydrogen chloride.
Ammonia gas will diffuse faster than hydrogen chloride gas because the relative molecular mass of ammonia is smaller than that of hydrogen chloride.
Diffusion rates of gasesAccording to Graham's law, the diffusion rate of gases is inversely proportional to the square root of their molecular weights.
Thus, the lower the molecular weight of a gas, the faster it will diffuse.
The molecular weight of ammonia is 17 while that of hydrogen chloride is 36.5. Thus, ammonia will diffuse faster than hydrogen chloride.
More on Graham's law can be found here; https://brainly.com/question/12415336
Where to start as a beginner in chemistry?
Answer:
Maybe try a Course Outline or talk to a professional for advice.
Explanation:
Hurry up for Brainlist
Answer: Maybe Unkown 1. I am not sure.
Explanation:
PLEASE HELP!!!!!!!!!
If you apply the same force to push each skateboard, will the cat or the rat accelerate the fastest? Explain.
A substance is 90% water. Some water evaporates, leaving a substance that is 80% water. What percent of the water evaporates
a car traveling at a speed of 30.0 m/s encounters an emergancy and comes to a complete stop. How much time will it tale for the car to stop if it decelerates at -4.0 m/s?
Answer:
the answer is 250kg but i am not sure
Explanation:
give me brainlest
Answer:
7.5 seconds
Explanation:
We can use the second equation of accelerated motion
vf = vi + a Δt
We know that the intial velocity (vi) is 30m/s, and the final velocity is 0 since it comes to a stop. We also know that the acceleration is -4m/s.
We can rearrange the equation for Δt (time)
vf = vi + a Δt
vf - vi = a Δt
(vf - vi)/a = Δt
and we can substitute the values into the equation for Δt now
Δt = (vf - vi)/a
Δt = (0 - 30)/-4
Δt = -30/-4
Δt = 7.5
Having the same number of protons and electrons results in a positively charged atom.
True or False
and why did you pick that answer
I WILL MARK YOU AS BRAINLIST
Answer:
False
Explanation:
If the atom has the same number of protons and electroncs, the atom would have a net charge of 0, meaning it has a neutral charge. A positively charged atom would have more protons (which are positively charged) than electrons (which are negatively charged)
HELP ME PLEASE I NEED HELP
Answer:
my answer is leter.
C
Explanation:
thanks fore watjing and plss help me in my qwestion
Answer:
[tex]\huge\bold{\purple{\bold{⚡B-34.3⚡}}} [/tex]
Explanation:
According to anglesum property-
The sum of interior angles of a triangle is 180°So, here for J, we add H and K and subtract it from the total 180Sum of H and K is 145.7180-145.7= 34.3A force that is not opposed by an equal and opposite force
Answer:
Balanced Force
Explanation:.
1. Which is the
A.C
B.E
C.A
D.B
E.D
Answer:
A c
Explanation:
A sample of an unknown gas occupies 5.51 L at 1.31 atm. What pressure would thisgas exert in a 0.520 L container if the temperature is held constant?
Answer:
13.9atm
Explanation:
Use Boyle's Law: P1V1 = P2V2
Manipulate the equation: P2 = P1V1/V2
Substitute the values: P2 = (1.31atm)(5.51L)/0.520L
P2 = 13.88096atm
Optionally round to 3 sig figs to get 13.9atm
How do you solve this ?
Answer:
How many grams Ni in 1 mol? The answer is 58.6934.
We assume you are converting between grams Ni and mole.
You can view more details on each measurement unit:
molecular weight of Ni or mol
The SI base unit for amount of substance is the mole.
1 grams Ni is equal to 0.017037690779543 mole.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between grams Ni and mole.
Type in your own numbers in the form to convert the units!
hope that help
Explanation:
Answer:
0.05 moles
Explanation:
In a mole of any substance, there exist 6.02
⋅ 10
^23 units of that substance.
So here, we got:
3.01 ⋅ 10^22 Mg atoms ⋅ 1 mole / 6.02 ⋅ 10^23 Mg atoms
= 0.05 moles
Hope that helps!
I- A sound is produced at one extremity of a metallic pipe of 1000 m of length. A person being at the other extremity discerns two sounds. (Vsound in the air is 340m/s)
a- Explain this phenomenon.
b- The interval time between the two perceptions is equal to 2.5 s. Calculate the speed of sound in the metal.
The sound was repeated because of the phenomenon of echo. The speed of sound in the metal is 800 m/s.
Echo results from the reflection of sound waves. The reason why a sound may be heard twice owes to the phenomenon of reflection which leads to echo.
To determine the speed of sound in the metal;
Length of metal = 1000 m
Time taken between the two sounds = 2.5 s
Using the formula;
V = 2d/t
V = 2(1000)/2.5
V = 800 m/s
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A body parts where the two bones meet in order to move
the answer should be joint
2. What type of compound is water (H20) and why is it called a universal solvent?
Answer:
H2O is a covalent compound and is called a universal solvent because it dissolves most substances than any other known liquid
The universal solvent, H₂O, is a covalent molecule that dissolves more compounds than any other liquid.
Briefing:Water makes an excellent solvent because of its physical and chemical composition. In water molecules, hydrogen and oxygen atoms are organized polarly, with hydrogen possessing a positive electric charges and oxide having a negative electrical charge.
Why water is called universal solvent ?Water is referred to be the "universal solvent" because it has a wider range of dissolving abilities than any other liquid. Every living thing on the world requires this. It indicates that wherever water flows, whether through the air, the ground, or our bodies, it carries valuable molecules, minerals, and nutrients.
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4.
How many grams would .50 moles of Mg be?
5.
10 moles of Al = ? atoms
6.
How many atoms are in 10 moles of Zinc?
7.
If you had 3,5 x 10 - atoms of carbon how many grams would you have?
8.
Given 100g of C = ? atoms
Answerl
see explanation
Explanation:
Question
4.
How many grams would 0 .50 moles of Mg be?
Mg has an atomic weight of 24 so 1 mole of Mg weighs 24 gms
0.50 moles weigh 0.50 X24gm = 12 gm
5.
10 moles of Al = ? atoms
1 mole = 6.02 X10^23 atoms ...Avogadros number
10 moles is 10 X6.02X10^23 = 6.02X10^24
6.
How many atoms are in 10 moles of Zinc?
a mole is Avogadros number
same as 10 moles of Al,10 moles of Zn= 6.02 X10^24 atoms
7.
If you had 3,5 x 10 - atoms of carbon how many grams would you have?
what is the power of the 10-in the question...it was cut off and the question cannot be answered as isif it was 3.5 x10^23 that would be 3.5/6.02 =0,581 moles of C and would weigh0.581X12 = 6.97 gm,
8.
Given 100g of C = ? atoms
Carbon has an atomic of 12 100 gm of C are 100/12 = 8.33 moles of C
each mole comtains Avogadros number so there are
8.33 X 6.02 X10^23 = 5.01 X10^24 atoms of C
Nitrogen gas reacts with hydrogen gas to form ammonia, a common cleaning liquid when diluted with water. Which equation is correct for this reaction
Answer:
N2(g) + 3H2(g) <---> 2NH3(g)
This is a reversible reaction
Hydrochloric acid and potassium hydroxide
Answer:
what is the question?
Explanation:
que se necesita para que se produzca corriente eléctrica en un material conductor
Answer:
Necesita un flujo libre de electrones, un empujón para mover las cargas a través del circuito cerrado y una vía para transportar las cargas. Lo siento, estoy usando el traductor de googl
Explanation:
Which characteristic do electronegativity differences indicate about reactions between atoms
O bond number
O compound energy storage
O valence electron number
O bond type
Answer:
valence electron number
Explanation:
trust me
Valence electron number is the characteristic do electronegativity differences indicate about reactions between atoms. Hence option C is correct.
What is electronegativity?Electronegativity is defined as the propensity for atoms involved in covalent bonds to draw the bonding electrons. An indicator of how strongly atoms draw bonding electrons to them is their electronegativity. How polar a bond is depends on the difference in electronegativity between two atoms. Since there is no difference in electronegativity between the two identical atoms in a diatomic molecule, the bond is nonpolar or pure covalent.
Valence electron number is defined as an atom's associated outer shell electron that, if the outer shell is open, can take part in the formation of a chemical bond.
Thus, valence electron number is the characteristic do electronegativity differences indicate about reactions between atoms. Hence option C is correct.
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1-Two metal samples with equal masses are heated by equal amounts of energy. The temperature of Sample A rose 10oC while the temperature of Sample B increased by 20oC. What can you determine about the specific heat capacity of these substances?
2-A sample of a metal with a mass of 10.0 g cooled from 50.4 oC to 25.0 oC, releasing of 168 Joules of heat. What is the specific heat of the metal sample?
Answer:
the channel tunnel has been a very busy and challenging experience and we are mot doing.
Explanation:
ok and I like the country studies opportunity and I will be found by him too as he is a fact in the sentence.
PLEASE HELP EVERYONE KEEPS PUTTING LINKS STOP I'M NOT GONNA DOWNLOAD THAT
Answer:
they are? I think you should comment "STOP" to them
Minerals are all naturally occurring solid substances with a definable chemical composition. They must also possess ________. Group of answer choices
Answer:Minerals are all naturally occurring solid substances with a definable chemical composition They must also possess what property
Minerals are all naturally occurring solid substances with a definable chemical composition. They must also possess . Two distinct minerals may have the same chemical formula. The most useful diagnostic property of minerals is their color in hand sample.
Explanation:
Need Help!Chemistry! No links,no guessing please.
Answer: The answer is two.
Explanation: The answer is two because it represents a molecule having a nonpolar convalent bond.
