Answer:
22.6%
Explanation:
I just answered and got it right
how many electrons does a covelent bond consist of?
Answer: 2 electrons
Explanation: Good luck! :D
Tim and Jose are moving furniture. Tim pushes a 150 kg sofa with 300N
force. As a result, Sofa’s acceleration was __________ according to Newton’s
Second Law of motion. (F = ma)
Answer:
a = 2m/s²
Explanation:
Given data:
Mass of sofa = 150 Kg
Force applied = 300 N
Acceleration = ?
Solution:
Formula:
F = ma
F = force
m = mass
a = acceleration
by putting values,
300 N = 150 Kg × a
a = 300 N /150 Kg
a = 300 Kg m/s² / 150 Kg ( N = Kgm/s²)
a = 2m/s²
If the wavelength of red light is 650 x 10^-9 meters (or 6.50x10^-7m) and the speed of light (c) is 3.00 x 10^8 m/s , what is its frequency in Hz?(1/sec = Hz) , and c = (wavelength x frequency)
Answer:
f = 4.6 × 10¹⁴ Hz
Explanation:
Given data:
Wavelength of light = 6.50x10^-7m
Speed of light = 3.00 x 10^8 m/s
Frequency of light = ?
Solution:
Formula:
Speed of radiation = frequency × wavelength
by putting values,
3×10⁸ m/s = f × 6.50x10^-7m
f = 3×10⁸ m/s / 6.50x10^-7m
f = 0.46 × 10¹⁵ s⁻¹
f = 0.46 × 10¹⁵ Hz
f = 4.6 × 10¹⁴ Hz
Dribbling a basketball harder into the floor makes it bounce higher is an example of what newton's law?
Based on the molecular formula, determine whether each of the following is an alkane, alkene, or alkyne. (Assume that the hydrocarbons are noncyclical and there is no more than one multiple bond.)
a. C3H6
b. C6H12
c. H8H18
d. C7H12
Answer:
C₃H₆ is an alkene
C₆H₁₂ is an alkene
C₈H₁₈ is an alkane
C₇H₁₂ is an alkyne
Explanation:
To determine which of the compound is alkane, alkene, or alkyne,we shall use the general formula of alkane, alkene, and alkyne. This is illustrated below:
General formula for alkane => CₙH₂ₙ₊₂
General formula for alkene => CₙH₂ₙ
General formula for alkyne => CₙH₂ₙ₋₂
For C₃H₆:
n = 3
Alkane => CₙH₂ₙ₊₂ => C₃H₂₍₃₎₊₂ => C₃H₈
Alkene => CₙH₂ₙ => C₃H₂₍₃₎ => C₃H₆
Alkyne => CₙH₂ₙ₋₂ => C₃H₂₍₃₎₋₂ => C₃H₄
Thus, C₃H₆ is an alkene
For C₆H₁₂:
n = 6
Alkane => CₙH₂ₙ₊₂ => C₆H₂₍₆₎₊₂ =>C₆H₁₄
Alkene => CₙH₂ₙ => C₆H₂₍₆₎ => C₆H₁₂
Alkyne => CₙH₂ₙ₋₂ => C₆H₂₍₆₎₋₂ => C₆H₁₀
Thus, C₆H₁₂ is an alkene
For C₈H₁₈:
n = 8
Alkane => CₙH₂ₙ₊₂ => C₈H₂₍₈₎₊₂ => C₈H₁₈
Alkene => CₙH₂ₙ => C₈H₂₍₈₎ => C₈H₁₆
Alkyne => CₙH₂ₙ₋₂ => C₈H₂₍₈₎₋₂ => C₈H₁₄
Thus, C₈H₁₈ is an alkane.
For C₇H₁₂:
n = 7
Alkane => CₙH₂ₙ₊₂ => C₇H₂₍₇₎₊₂ => C₇H₁₆
Alkene => CₙH₂ₙ => C₇H₂₍₇₎ => C₇H₁₄
Alkyne => CₙH₂ₙ₋₂ => C₇H₂₍₇₎₋₂ => C₇H₁₂
Thus, C₇H₁₂ is an alkyne.
SUMMARY:
C₃H₆ is an alkene
C₆H₁₂ is an alkene
C₈H₁₈ is an alkane
C₇H₁₂ is an alkyne
How many moles are in 25.58 grams of H20?
Explanation:
1.42 Moles are there
What is creating our Earth's Magnetic field?
1) Our Earth's iron liquid outer core rotating around the solid inner core
2) Our Earth having a stationary inner core
3) Our Earth having rocky center
4) All of the above
Answer:
1) Our Earth's iron liquid outer core rotating around the solid inner core
Explanation:
The earth's magnetic field or the geomagnetic field is produced as a result of the earth's iron liquid outer core rotating around the solid inner core.
This produces the earth's magnetic field.
The earth's core is made up of solid and liquid region. Only the densest elements are found within this region. So, the core is made up of metals which are mainly iron and nickel. The outer core is liquid or molten iron and the inner core is solid. The molten iron and nickel in the outer core moves around the inner core and generates the currents which induces a magnetic field round the earth.How many sulfur atoms are in 5 SF6 ?
Answer:
The molecular formula for sulfur hexafluoride is SF6 S F 6 , in which there is 1 sulfur atom and 6 fluorine atoms.
Explanation:
hope this helps
Thermodynamics and Q
How much energy is needed to heat 40.5g of water from 15.6°C to 73.0°C
Answer:
9717.246 J
Explanation:
From the question given above, the following data were obtained:
Mass (m) of water = 40.5 g
Initial temperature (T₁) = 15.6 °C
Final temperature (T₂) = 73 °C
Specific heat capacity (C) of water = 4.18 J/gºC
Heat (Q) =.?
Next, we shall determine the change in the temperature of water. This can be obtained as follow:
Initial temperature (T₁) = 15.6 °C
Final temperature (T₂) = 73 °C
Change in temperature (ΔT) =?
ΔT = T₂ – T₁
ΔT = 73 – 15.6
ΔT = 57.4 °C
Finally, we shall determine the heat energy required. This can be obtained as follow:
Mass (m) of water = 40.5 g
Specific heat capacity (C) of water = 4.18 J/gºC
Change in temperature (ΔT) = 57.4 °C
Heat (Q) =.?
Q = MCΔT
Q = 40.5 × 4.18 × 57.4
Q = 9717.246 J
Thus, the heat energy required is 9717.246 J
How many moles are in 2.5 g of N2?
0.089 moles
KD 0.18 moles
1.3 moles
11 moles
Answer:
0.089
Explanation:
2.5/ 14= .178 then 0.178/ 2 again and you get 0.089
The moles of nitrogen in 2.5 grams of the compound is 0.089 moles. Thus option A is correct.
Moles can be calculated as the ratio of mass to molecular mass.
Moles = [tex]\rm \dfrac{weight}{molecular\;weight}[/tex]
The mass of Nitrogen = 14 g/mol
The mass of diatomic nitrogen = 2 [tex]\times[/tex] mass of nitrogen
The mass of diatomic nitrogen = 2 [tex]\times[/tex] 14 g/mol
The mass of diatomic nitogen = 28 g/mol
The molecular weight of Nitrogen = 28g/mol
Given, the mass of Nitrogen = 2.5 g
Moles of nitrogen = [tex]\rm \dfrac{2.5}{28}[/tex]
Moles of Nitrogen = 0.089 moles.
The moles of nitrogen in 2.5 grams of the compound is 0.089 moles. Thus option A is correct.
For more information about a mole, refer to the link:
https://brainly.com/question/21898305
A chemist prepares a solution of silver (I) perchlorate (AgCIO4) by measuring out 134.g of silver (I) perchlorate into a 50.ml volumetric flask and filling the flask to the mark with water. calculate the concentration in mol/L of the silver (I) perchlorate soluation
Answer:
13 M
Explanation:
Molar mass of AgCIO4 = 207 g/mol
Number of moles of AgCIO4= 134/207= 0.65 moles
Number of moles= concentration × volume
Concentration = number of moles/volume
Concentration = 0.65 × 1000/50 = 13 M
You have 70 grams of aluminum. How many moles do you have
Answer:
70 moles is an Alluminium
describe the difference between a physical and chemical change explain what happens during a checmical reaction
Explanation:
A physical change is a change that alters the physical properties of matter particularly the form and state.
In many cases the change is easily reversible. Examples are changes of state such as freezing, boiling, melting e.t.c
A chemical change is a change in which a new kind of matter is formed. It is always accompanied by energy changes which can either be evolution or absorption of heat or light or both.
The process is not easily reversible. Examples are combustion, rusting of iron, precipitation, e.t.c
During a chemical reaction, the reactants undergo a chemical change.
Jill graphs the speed of a model train that is travelling at a speed of 15 kilometers per hour. Which graph shows the speed of the model train?
Answer:c
Explanation:
What is the molar mass of Mg(CIO3)2
what is visibility ?
Answer:
Something or someone you can see invisibility is the opposite of something you cannot see or some thing you cannot see
Explanation:
Weigh out the appropriate amount of HEPES sodium salt required to prepare 100 mL of a HEPES buffer that has pH 7.50 and is 90 mM in HEPES. FW for the HEPES sodium salt is 260.31. Transfer to a 150 mL beaker. Flowchart: Calculate the amount of HEPES sodium salt required to make the buffer.
Answer:
2.343 g of HEPES sodium salt is needed.
Explanation:
So, from the question above we have the following parameters which is going to help in solving this particular question.
The number of moles = 90mM, the pH = 7.50, FW for the HEPES sodium salt = 260.31, and the volume of HEPES sodium salt required = 100mL.
Therefore, the amount of HEPES sodium salt required to make the buffer = 260.31 × 9 × 0.001 = 2.343 grams of HEPES sodium salt is needed in 10mL.
how an object accelerates when it changes direction?
Answer:
An object which experiences either a change in the magnitude or the direction of the velocity vector can be said to be accelerating. This explains why an object moving in a circle at constant speed can be said to accelerate - the direction of the velocity changes.
Explanation:
Answer:
An object which experiences either a change in the magnitude.
Explanation:
the direction of the velocity changes.
Hope that helps :)
Have a good day
how will you ensure your server is protected from data hacks?
Answer:
Establish and Use a Secure Connection
Use SSH Keys Authentication
Secure File Transfer Protocol
Secure Sockets Layer Certificates
Use Private Networks and VPNs
Explanation:
What type of weather typically results from a low pressure system?
I need help!!!!
Answer:
Storms and hurricanes can be formed with low pressure. It always results into unsettled weather.
Explanation:
Hope this helps!
What is the formula for the ionic compound formed between sodium and oxygen?
Answer:
Na2O (the 2 is small the o is not a 0 but and OOh)
Explanation:
Hey there, The formula for the compound formed between sodium and oxygen will be Na2O
Though since sodium is a metal and oxygen is a nonmetal, Na2O is expected to be ionic.
What is an ionic compound?An ionic compound is a chemical compound made up of ions held together by electrostatic forces known as ionic bonding.
To determine an ionic compound's formula, first identify the cation and record its symbol and charge.
After that, identify the anion and record its symbol and charge. Finally, mix the two ions together to make an electrically neutral compound.
After two or more atoms lose or gain electrons to form an ion, an ionic bond can form.
Ionic bonds form when metals lose electrons and nonmetals gain electrons. Ions with opposite charges attract each other, forming an ionic bond.
The symbol for sodium is Na+, and the symbol for oxygen is O2. The resulting compound here in the given condition is Na2O.
Thus, this is the formula for the ionic compound formed between sodium and oxygen.
For more details regarding ionic compounds, visit:
https://brainly.com/question/9167977
#SPJ2
A gas in a sealed container has a pressure of 100 kPa at a temperature of 27 C. If the pressure in the container is increased to 20 kPa, what is the new temperature?
Answer: 32.4 C
Explanation: Gay-Lussac's Law or Third Gas Law states that for a constant volume, the pressure is directly proportional to absolute temperature: P alpha T; also stated as P/T = K, where K is a constant, and similarly, P1/T1 = P2/T2 .
Here P1= 100 kPa, P2=120 kPa (If pressure increases by 20 kPA), T1=27 C [Given]
Hence, T2= (T1*P2)/P1 = (27*120)/100=32.4 C [C is degree in Celcius]
The new temperature of the gas in the container when the pressure increased by 20 KPa is 87 °C
Data obtained from the question Initial pressure (P₁) = 100 KPa Initial temperature (T₁) = 27 °C = 27 + 273 = 300 KNew pressure (P₂) = 120 KPa New temperature (T₂) =? How to determine the new temperatureThe new temperature of the gas can be obtained as follow:
P₁ / T₁ = P₂ / T₂
100 / 300 = 120 / T₂
Cross multiply
100 × T₂ = 300 × 120
Divide both side by 100
T₂ = (300 × 120) / 100
T₂ = 360 K
Subtract 273 to obtain answer in °C
T₂ = 360 – 273 K
T₂ = 87 °C
Learn more about gas laws:
https://brainly.com/question/6844441
#SPJ2
All moving objects have kinetic energy. True False
Answer:
true
.......................
Answer: You're Welcome!
Oh, It's False - Kinetic energy depends upon the speed of the object; potential energy depends upon the position of the object.
Name the type of chemical reaction that occurs when magnesium chloride solution reacts with sodium carbonate solution
Answer:
precipitation reaction
The replacement reaction occurs when magnesium chloride solution reacts with sodium carbonate solution and form [tex]MgCO_{3}[/tex] white precipitate.
What is replacement reaction?The reaction in which cation of one molecule is replace or substitute by cation of another molecule or anion of one molecule is replace or substitute by another molecule.Example : [tex]MgCl + NaCO_{3}[/tex] → [tex]MgCO_{3} + NaCl[/tex]What is precipitate?The insoluble substance accumulate at the bottom of the surface is called precipitate.Example : [tex]MgCl + NaCO_{3}[/tex] → [tex]MgCO_{3} + NaCl[/tex]In the above reaction [tex]MgCO_{3}[/tex] white precipitate.Learn about replacement reaction.
https://brainly.com/question/17970302
#SPJ2
The oldest known flower lived 120, million years ago. Is that a measured or exact number?
Answer:
measured
Explanation:
no way can they pin point exactly when something lived when its in the millions
the man is being warmed by?
radiation
convention
conduction
Answer:
Comvection
Explanation:
The movement causes the density to rise and therefore transfer more heat
A student pours a 10.0mL sample of a solution containing HC2H3O2(pKa=4.8) and NaC2H3O2 into a test tube. The student adds a few drops of bromocresol green to the test tube and observes a yellow color, which indicates that the pH of the solution is less than 3.8 . Based on this result, which of the following is true about the relative concentrations of HC2H3O2 and NaC2H3O2 in the original solution?
Answer:
[HC2H3O2] > NaC2H3O2
Explanation:
The concentration of [tex]\rm HC_2H_3O_2[/tex] has been higher than the concentration of [tex]\rm NaC_2H_3O_2[/tex].
The pKa has been defined as the acid constant that has been used for the determination of the strength of the acid. The higher the pKa value, the weaker the acid has been.
The [tex]\rm HC_2H_3O_2[/tex] has the pka value 4.8 depicting the solution has been a pH 4.8. With the addition of [tex]\rm NaC_2H_3O_2[/tex], the pH has been shifted towards the acidic condition, thus the Hydrogen concentration has been higher.
The change in the pH has been resulted in the reduction in the pH from the basic to acidic condition. Since the concentration of the [tex]\rm HC_2H_3O_2[/tex] has been higher than the [tex]\rm NaC_2H_3O_2[/tex] concentration, the pH has been shifted towards the more acidic condition.
Thus, the concentration of [tex]\rm HC_2H_3O_2[/tex] has been higher than the concentration of [tex]\rm NaC_2H_3O_2[/tex].
For more information about the pH of the solution, refer to the link;
https://brainly.com/question/11936640
BRAINLLEST! Boiling water for mac and cheese is a physical change. Give 2 pieces of evidence to support this claim
Answer:
In explanation.
Explanation:
Physical changes are generally changes in states of matter. So, the water going from liquid to gas is a phase change and therefore physical. (It's still water, just in a different form). Im not sure about the second piece of evidence though. Unless you are talking about the Mac and Cheese which in that case is also a physical change as the two ingredients cheese and macaroni stay the same when cooked just become softer and edible.
aqueous hydrochloric acid HCl will react with solid sodium hydroxide NaOH to produce aqueous sodium chloride NaCl and liquid water H2O. Supposed 6.93 g of hydrochloric acid is mixed with 2.4 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 2 significant digits. g
Answer:
Explanation:
HCl + NaOH = NaCl + H₂O.
1 mole 1 mole 1 mole 1 mole
6.93 g of hydrochloric acid = 6.93 / 36.5 = .189 mole of HCl
2.4 g of NaOH = 2.4 / 40 = .06 mole of NaOH
NaOH is in short supply so it is the limiting reagent .
1 mole of NaOH reacts with 1 mole of HCl to give 1 mole of Water
.06 mole of NaOH will react with .06 mole of HCl to give .06 mole of water
Water formed = .06 mole
= .06 x 18 = 1.08 g
= 1.1 g
6- A favorable condition for two elements to form an ionic bond is?
a- both should be electronegative
b- one should have low electron affinity and the other low ionization energy.
C- one should have high electron affinity and the other low ionization energy.
d- both should be highly electronegative
Answer: C- one should have high electron affinity and the other low ionization energy.
Explanation:
Ionization energy is the energy required to remove the electron from an isolated gaseous atom.
Electron affinity is the tendency of an isolated atom to attrcat the electrons towards itsellf.
An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and it can donate electron easily if it has low ionization energy.
The element which accepts the electrons is known as electronegative element or non metal and it can easily accept the electron if it has high electron affinity.
