Answer:
false, Hydrogen is the simplist
Hydrogen is the simplest element; its atom consists of only one proton and one electron
If 342.2 grams of C12H22O11 (sucrose) is dissolved in 1.0 L of solution. What is the molar concentration of the solution? Report your answer with the correct number of significant figures.
Answer:
M = 1 M
Explanation:
Given data:
Mass in gram = 342.2 g
Volume of solution = 1.0 L
Molar concentration = ?
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
Number of moles of sucrose:
Number of moles = mass/molar mass
Number of moles = 342.2 g/ 342.2 g/mol
Number of moles = 1 mol
Molarity:
M = 1 mol / 1.0 L
M = 1 mol/L
M = 1 M
The molar concentration of the solution is :
- M = 1 M
Check below to see the full solution.
Molar ConcentrationMolarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
What information do we have?
Mass in gram = 342.2 g
Volume of solution = 1.0 L
Molar concentration = ?
Number of moles of sucrose:
Number of moles = mass/molar mass
Number of moles = 342.2 g/ 342.2 g/mol
Number of moles = 1 mol
Molarity:
Molarity = number of moles of solute / L of solution
M = 1 mol / 1.0 L
M = 1 mol/L
M = 1 M
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Which particles are equal in number for an atom with a neutral charge?
At his favorite restaurant, Dylan orders a soda with his dinner. The ice in his drink has a mass of 6 g and a volume of 20 cm3. What is the density of the ice? Explain the steps you took to solve this problem, showing your work.
An AM radio station uses radio waves with wavelengths of 300 meters. How much energy is in this wave? 1.7 x 10-24 J
Answer:
E = 6.6×10⁻²⁸ J
Explanation:
Given data:
Wavelength = 300 m
Energy of wave = ?
Solution:
Formula:
E = h c/λ
c = 3×10⁸ m/s
h = 6.63×10⁻³⁴ Js
Now we will put the values in formula.
E = 6.63×10⁻³⁴ Js × 3×10⁸ m/s / 300 m
E = 19.89×10⁻²⁶ J.m / 300 m
E = 0.066×10⁻²⁶ J
E = 6.6×10⁻²⁸ J
The compound lead(II) acetate is a strong electrolyte. Write the reaction when solid lead(II) acetate is put into water:
Answer:
Pb(CH3COO)2(s) -------> Pb^2+(aq) + 2CH3COO^- (aq)
Explanation:
Recall that a strong electrolyte is an electrolyte that dissociates completely in solution. Hence, if we say that lead(II) acetate is a strong electrolyte we are actually saying that lead(II) acetate ,dissociates completely in solution to yield lead II ions and acetate ions.
This implies that the reaction equation shown in the answer section tends to go to completion since lead(II) acetate is a strong electrolyte.
What is the pH after two solutions are mixed: 1. A 0.155 M H2SO4 solution with a volume of 35.0 mL and 2. A 0.225 M solution of KOH with a volume of 35.0 mL. The volumes are additive.
Answer:
[tex]pH=1.67[/tex]
Explanation:
Hello.
In this case, since the reaction between the sulfuric acid and the potassium hydroxide is:
[tex]2KOH+H_2SO_4\rightarrow K_2SO_4+2H_2O[/tex]
We can see a 2:1 mole ratio between them, thus, we compute the moles of acid and base that are present in the solution by using the employed volume and its concentration:
[tex]n_{H_2SO_4}=0.155mol/L*0.0350L=0.005425molH_2SO_4\\\\n_{KOH}=0.225mol/L*0.0350L=0.007875molKOH\\[/tex]
Next, we use the 2:1 mole ratio to compute the consumed moles of acid:
[tex]n_{H_2SO_4}^{consumed}=0.007875molKOH*\frac{1molH_2SO_4}{2molKOH}=0.0039375molH_2SO_4[/tex]
It means that the leftover of sulfuric acid is:
[tex]n_{H_2SO_4}^{leftover}=0.005425-0.0039375=0.001488molH_2SO_4[/tex]
Therefore, since sulfuric acid is a strong acid, the pH is defined in terms of its concentration which is actually equal to the concentration of hydrogen ions in solution, which is computed considering the total additive volume:
[tex][H^+]=[H_2SO_4]=\frac{0.001488mol}{0.070L}=0.02125M[/tex]
So the pH turns out:
[tex]pH=-log(0.02125)\\\\pH=1.67[/tex]
Best regards.
lab
table b:eyedrop of blue water in cold water
table c:eyedrop of red water in hot water
table d:see how temperature changes on white + black paper with light shining on them
plz help
brainliest for 1st correct answer
Answer:
lol, I just did this assignment, cold water
0:30: slowly expand
1:00: still expanding
1:30: expanding is continued
2:00: still expanding slowly
2:30: expanding slowly
3:00: expanded twice the size from the first time
hot water
0:30: expanding quickly
1:00: still expanding
1:30: starts to reach the surface and still expanding
2:00: almost all the of the dye reached the top
2:30: the dye reached the top and is starting to split
3:00: the dye split appart and is moving down again
radiation
white paper
0:30: at a low temp. at around 3.3 C
1:00: still at a low temp. around 4.4 C
1:30: slowly rising temp. around 5.5 C
2:00: still slowly rising temp. around 7.2 C
2:30: still at a low temp. around 8.3 C
3:00: ends at a low temp. around 10 C
black paper
0:30: at a resonable temp. at around 6.6 C
1:00: temp. rises quicker at around 13.3 C
1:30: temp. stil rising quickly at around 17.7 C
2:00: temp. is getting hotter at around 21.6 C
2:30: temp. is still getting hotter at around 26.1 C
3:00: temp. ends at a hot temp. at around 30 C
Explanation:
a radioactive substance decays to 1/3 of its original amount in 10 hours. Find the half life of the substance g
Answer:
Explanation:
[tex]N=N_0(\frac{1}{2} )^\frac{t}{T}[/tex] , T is half life , t is time taken to reduce N₀ to N .
1/3 = [tex](\frac{1}{2})^\frac{10}{T}[/tex]
taking log on both sides
-log3 = 10/Tx log.5
T = 10 x log .5 / - log 3
= 10 x -.3010 / - .4771
= 6.31 hours .
Soil horizons develop as a result of
Answer:
WVCA - Soil Formation and Soil Horizons. Soils develop as a result of the interactions of climate, living organisms, and landscape position as they influence parent material decomposition over time.
Explanation:
Complete the sentence by using "Direct", "Inverse", or equal. The pressure and volume of a gas change in opposite directions. This can be described as an " upside-down" relationship. We can also say that the relationship between the pressure and volume of a gas is a __________________ relationship
answer:
i believe the answer is inverse.
if i'm wrong sorry :(
if i'm right your welcome :)
Why do we need to identify matter?
Answer:
It's important for scientists to know the properties of matter because all things are made up of matter. Each type of matter has different physical characteristics and scientists need to know and understand these characteristics to make calculations. ... The main phases of matter are solid, liquid, and gas
Explanation:
^^
While preforming an experiment involving colors and heat,Susan noticed that the black paper was warmer than the white piece of paper.This is known as a?
Answer:
Blackbody radiation
Explanation:
This phenomenon described by Susan is know as black body radiation. Different materials by color reacts to incident radiation on them in diverse manner.
A white surface will reflect all the wavelength of light incident on it. A black surface will absorb all the wavelength of light on it.This absorption causes the black surface to be hotter compared to other surfaces.
The function of hair is to:
a. protect skin from ultraviolet light
b. regulate temperature
C. help keep particles out of eyes and nose
d. all of the above
Answer:
D I think. I'm not sure. I think it's all of them
The Law of Superposition is most relevant when studying which type of rock?
A.
metamorphic
B.
granite
C.
sedimentary
D.
igneous
Answer:
Sedimentary
Explanation:
Sedimentary rock is formed when pieces of eroded earth are deposited in layers. These layers are piled upon one another, slowly pressed down into the earth, and pressurized to become rock. The Law of Superposition states that, of these layers, the younger are found on top of the older.
The Law of Superposition is most relevant when studying this type of rock: C. sedimentary.
A sedimentary rock can be defined as a rock that is typically formed as a result of the accumulation, lithification or deposition of sediments (minerals or organic particles) at or near Earth's surface.
According to Nicolas Steno, the four (4) laws of stratigraphy include the following:
Law of original horizontality.Law of cross-cutting relationships.Law of lateral continuity.Law of superposition.Steno's Law of Superposition states that within a sequence of rock layers (rock strata) in sedimentary rocks, the oldest (first) strata lies at the base (bottom) of the sequence while younger (newer) strata sit atop the older strata.
Hence, the sequence of rock layers (rock strata) in sedimentary rocks typically marks the time of deposition of each of the rock layers according to Steno's Law of Superposition.
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Which of the following is NOT a
homogenous mixture?
Answer:blacks screen. No answers to choose from. Thanks for the points:))
Explanation:
Which model below represents an atom with an atomic mass of 4 units?
helium
Explanation:
because it has the mass number of 4
What does “circulate” mean in this passage?
Sentence : “When certain mosquitoes bite someone, marlaria enters that persons blood, allowing the disease to circulate.”
Answer:
Below
Explanation:
Move or cause to move continuously or freely through the blood.
It get hotter towards the center
Answer:
earth
Explanation:
C. If an electron is added to the outer shell, how will this affect the charge and volume of the atom?
if an electron is added on the outer shell
Answer:
An atom that gains or loses an electron becomes an ion. If it gains a negative electron, it becomes a negative ion. If it loses an electron it becomes a positive ion.
Answer:
when an atom gains an electron, it gains a negative charge . it's volume increases as well due to the increase in repulsion between the electrons
3. How has the HST managed to withstand harsh space conditions and operate for
long period of time?
Answer:Replacing Hubble's Main Computer NASA performed a battery of mechanical, electrical, radiation and thermal tests to guarantee that the computer would survive the trip to orbit, withstand bombardment by cosmic and solar radiation and work flawlessly in the extreme temperatures of space for the rest of Hubble's life.
Explanation:
what is the form of light
Answer:
most likely Energy that's what I'm thinking
1. The
in an atom of that element.
number of an element equals the number of protons
2. The exact position of the electrons of an atom cannot be determined because they are
in constant
to the nucleus of an atom have the least
3. The electrons
amount of energy
4. The number of
bonds that atom can form.
in an atom tells you how many chemical
Answer:
1. Proton = electron if the element is not in an ionic state
proton = atomic number
Would you expect Nio to dissolve in an aqueous solution of NaNO3?
Answer:
NiO Does Not Dissolve In An Aqueous Solution Of NaNO3.
Explanation:
As you move from earth's inner core through the mantle to the crust, how would
temperature, pressure and density of the surrounding rock change?
The temperature would decrease, but pressure and density would increase.
They would all decrease.
O They would stay the same.
O They would all increase.
Answer:
all decrease
Explanation:
A 50.0 g sample of liquid water at 0.0 c freezes and cools to form ice at -20.0 c.
How much energy is involved in this change.
Answer:
70 kinetic energy
Explanation:
Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, -4200J of energy is involved in this change.
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances. Internal energy is the sum of all kinds of energy that the particles of a matter can possess, for example translational energy. Rotational energy.
Mathematically,
q = mc∆T
m = mass of the substance
c = specific heat capacity of water =4.2J/K/g
∆T = change in temperature
q = 50×4.2×(253-273)
q = -4200J
Therefore, -4200J of energy is involved in this change.
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Identify the major product that is obtained when 2-hexyne is treated with H2 and Lindlar's catalyst.
Answer:
cis-2-hexene
Explanation:
Hello.
In this case, since a Lindlar's catalyst is mainly composed by palladium, which is a transition metal with a very exceptional surface area which makes it a suitable catalyst for hydrogenation reactions by which hydrogen is added to the insaturation in order to make a double bond where the triple bonds was in an alkyne, based on the attached picture we can see that the major product of that reaction is cis-2-hexene.
Best regards!
If the compound below is oxidized, the resulting product is ___. Select one: a. methane and propane b. butanal c. butanoic acid d. butane
The complete question is
If the compound below is oxidized, the resulting product is ___.
the compound given is Butanal
Select one:
a. methane and propane
b. butanal
c. butanoic acid
d. butane
Answer:
C. Butanoic Acid
Explanation:
When Butanal is oxidized using reagents like KMnO4, Tollens reagent etc.
When Aldehyde is oxidized corresponding Carboxylic Acid is produced
Butanal → Butanoic Acid
A mixture of propane and butane is burned with pure oxygen. The combustion products contain 46.7 mole% H2O. After all the water is removed from the products, the residual gas contains 69.0 mole% CO2 and the balance O2 a. What is the mole percent of propane in the fuel?
Answer:
28%
Explanation:
Basically, all o did was write the equations, balance it and solve for them. Also, at the place I stared, I used simultaneous equation to solve it. Multiplying by 8 and also 3.
It's a pretty straightforward question.
At the final step that's missing, I Did
(y)C3H8 = 2.8 / ( 2.8 + 7.1)
(y)C3H8 = 0.28
Based on the synthesis reaction, what would the product of the reaction be? NaPO3 + CuO → ? NaO + CuPO3 Na + P + Cu + O4 NaCuPO4 NaCu + PO4
Answer:
C
Explanation:
Based on the synthesis reaction,the product of the given chemical equation is NaCuPO4 .
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Use the scenario below to answer the following
questions.
Mr. John has two plants labeled container A and container B that
he placed at the window to expose to sunlight. He placed both plants
in the sun the same day and time. Mr. John always gives both plants
the same amount of water every day. One day, Mr. John decided that
he was going to give container A more water than Container B . A
week later, Mr.John went to check on his plants and realized that one
of his plants was bigger than the other.
1. List the experimental variables that are in the scenario.
2. In which of the Two containers did the plant get bigger.
3. Explain your Answer.
4. Use examples from the scenario to identify the different
experimental variables.
Answer:
i had this question a couple of weeks ago i just cant remember the answer other wise i would tell you but im sorry:( <3
Explanation: