Answer:
Which phrase best describes wave motion? Movement of energy through space or a medium.
Explanation:
Answer option A.
What is one difference between an electron and a neutron?
Answer: Neutron has no charge, electron has a charge and mass. Neutron occurs inside the nucleus where electron is seen outside the nucleus.
Explanation:
2 P + 5 Cl2=2 PCl3 +886.0 kJ
How much energy will be produced when 1.382 mol P reacts with excess
Cl2?
Answer:
612.2kJ are produced
Explanation:
Based on the reaction:
2P + 5Cl₂ → 2PCl₃ + 886.0kJ
When 2 moles of P react with an excess of chlorine 886.0kJ are produced (That is 886.0kJ / 2mol P).
To solve this question we must use the last statement as follows:
1.382mol P * (886.0kJ / 2mol P) =
612.2kJ are producedHow many formula units are in 325 grams of iron (III) chloride?
Answer:
1.204 × 10^24 formula units
Explanation:
Using the following formula to convert mass of iron (III) chloride to moles;
mole = mass/molar mass
Molar mass of FeCl3 = 56 + 35.5(3)
= 56 + 106.5
= 162.5g/mol
Mole = 325/162.5
mole = 2mol
Next, to calculate the formula units of FeCl3, we multiply the number of moles of FeCl3 by Avagadro number (6.02 × 10^23)
Formula units of FeCl3 = 2 × 6.02 × 10^23
12.04 × 10^23
= 1.204 × 10^24 formula units.
Dropping leaves in the fall is a characteristic of what type of tree?
A; deciduous
B; evergreen
C; coniferous
D; boreal
Answer:
A; deciduous
Explanation:
Trees that lose all of their leaves for part of the year are known as deciduous trees. Those that don't are called evergreen trees. Common deciduous trees in the Northern Hemisphere include several species of ash, aspen, beech, birch, cherry, elm, hickory, hornbeam, maple, oak, poplar and willow
Answer:
the answer is decidous trees
WILL MARK BRAINLEISTTTT
HELPPPPPP
Substitute symbols and formulas for names and write balanced equations for each of the
reactions described below.
a) When copper(II) carbonate is heated, it forms copper(II) oxide and carbon dioxide gas.
b) Ammonium nitrate decomposes to water and dinitrogen monoxide.
c) Barium hydroxide reacts with carbon dioxide to form barium carbonate and water.
d) Sodium reacts with water to produce sodium hydroxide and hydrogen gas.
Answer:
jkrifhcuhixjck
gvudd
Explanation:
dugucdsorfooggigj
a CUCO3(s) + ( I don't have the symbol on my phone ) delta CUo(s) + CO2(g)
b NH4NO3➡️ HNo3 + H2O
c. Ba(OH)2+CO2 ➡️ BaCO3+H20
d Na +H20 ➡️NaOH +h2
Explanation:
I think this should be it , I think that 8s the symbol for hydrogen gas if its not correct I'm sorry
PLZ HELP ILL GIVE BRAINLIST!
How does the energy of the different waves of the spectrum vary with wavelength ?
Answer:
The energy of a wave is inversely proportional to the wavelength of the wave.
As wavelength increases, the energy of the wave decreases.
As wavelength decreases, the energy of the wave increases.
Explanation:
The energy of a wave is directly proportional to the wave's frequency. As frequency increases, so does the energy of the wave.
[tex]E\propto f[/tex] (energy [tex]E[/tex] is proportional to frequency [tex]f[/tex])
How is this related to wavelength?
Frequency is inversely proportional to wavelength. That means that as frequency increases, wavelength decreases and as frequency decreases, wavelength increases.
[tex]f\propto \frac{1}{\lambda}[/tex] (frequency [tex]f[/tex] is inversely proportional to wavelength [tex]\lambda[/tex])
Therefore, as wavelength increases, the energy of a wave decreases and as wavelength decreases, the energy of a wave increases.
[tex]E\propto f\propto \frac{1}{\lambda}[/tex]
Convert 4.00 atm to mmHg
Group of answer choices
404 mmHg
2430 mmHg
.746 mmHg
3040 mmHg
Answer:
3040 mmHg
Explanation:
Here
we have to convert 4.00 atm to mmHg
As we know that
The number of atm in 1 mmHg is 0.0013157895567935
Now there is 4.00 atm So, in mmHg it would be
And, according to this, the working is given below:
= 4 ÷ 0.0013157895567935
= 3,039.99
= 3040 mmHg
Hence, the last option is correct
And, the same is relevant and considered too
How can you tell that a sample contains acetaminophen?
Which force was the first to be discovered?
Gravity
Weak nuclear force
Strong nuclear force
Electromagnetic force
Answer:
Gravity
Explanation:
Sir Isaac Newton was an English mathematician and mathematician and physicist who lived from 1642-1727. The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature.
Answer:
A. Gravity
Explanation:
because Isaac Newton published a comprehensive theory of gravity in 1687. Though others had thought about it before him, Newton was the first to create a theory that applied to all objects, large and small, using mathematics that was ahead of its time.
2. Explain how an ionic bond is formed. Use the words "metal", "transfer", "nonmetal”, “cation", "anion" and
"attraction" in your description
Forming an Ion Ionic bonds are a class of chemical bonds that result from the exchange of one or more valence electrons from one atom, typically a metal, to another, typically a nonmetal. This electron exchange results in an electrostatic attraction between the two atoms called an ionic bond.
What is the molarity of 40ml of NaOH if it takes 25ml of 0.5 molar HCl to neutralize it?
Answer:
Molarity of 40 ml of NaoH is 0.3125 mL
Explanation:
As we know
Molarity of acid * volume of acid = molarity of base * volume of base
Substituting the given values, we get
[tex]0.5 * 25 = X* 40 \\X = \frac{0.5*25}{40} \\X = 0.3125[/tex]
Molarity of 40 ml of NaoH is 0.3125 mL
Find the molarity of 4.18 g MgCI2 in 500mL of water
Answer:
The molarity of MgCl₂ in water is 0.088 mol/L.
Explanation:
The molarity of MgCl₂ can be calculated as follows:
[tex] C = \frac{\eta}{V} = \frac{m}{MV} [/tex]
Where:
C: is the molarity =?
η: is the number of moles of MgCl₂ = m/M
V: is the volume of water = 500 mL = 0.500 L
m: is the mass of MgCl₂ = 4.18 g
M: is the molar mass of MgCl₂ = 95.211 g/mol
Hence, the molarity is:
[tex] C = \frac{m}{MV} = \frac{4.18 g}{95.211 g/mol*0.500 L} = 0.088 mol/L [/tex]
Therefore, the molarity of MgCl₂ in water is 0.088 mol/L.
I hope it helps you!
Which has a higher boiling point: CH3CH2CH3 or CH3CH2CH2OH? Explain.
Answer:
CH3CH2CH2OH
having more boiling point than CH
3
1. Which physical property is used to classify minerals and gems?
2. What do you get if you combine vinegar with baking soda?
3. What do you get if you combine iron, water, and oxygen?
4. Give an example of a physical change.
5. What is a chemical property of gasoline, paper, and wood?
I think these are the right answers sorry about 5...
1 are determined by the atomic structure and crystal chemistry of the minerals. or hardness
2 acid based reaction
3 rust
4 Examples of physical changes are boiling, melting, freezing, and shredding.
5 I don't know
Una determinada cantidad de neón ocupa 0,5 litros (L) a 200ºC. Calcular el volumen que ocuparía a 0ºC si la presión se mantiene constante. Recuerda que la temperatura la debes transformar a K (grados Kelvin), y para ello se suma °C + 273.
Answer:
[tex]V_2=0.87L[/tex]
Explanation:
¡Hola!
En este caso, al considerar la información dada, inferimos que este problem se resuelve aplicando la ley de Charles, dado que tenemos una relación entre el volume y la temperatura:
[tex]\frac{V_2}{T_2}=\frac{V_1}{T_1}[/tex]
Así, despejamos V2 (volumen final) y obtenemos:
[tex]V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{0.5L*473.15K}{273.15K}\\\\V_2=0.87L[/tex]
Saludos!
After a drought in which all the cotton crops died, a farmer moves away. Which of the following best describes the order of growth if the farm is left abandoned?
a
Cotton --> shrubs --> tall grasses --> weeds
b
Lichen --> flowers --> shrubs --> weeds
c
Lichen --> shrubs --> weeds --> flowers
d
Weeds --> tall grasses --> shrubs --> trees
The addition of 250.0 J to 30.0 g of copper initially at 22.0°C will change its temperature to what final value? (Specific heat of Cu= 0.387 J/g °C
Answer:
Final temperature = [tex]43.53^{\circ} C[/tex]
Explanation:
Given that,
Heat added, Q = 250 J
Mass, m = 30 g
Initial temperature, T₁ = 22°C
The Specific heat of Cu= 0.387 J/g °C
We know that, heat added due to the change in temperature is given by :
[tex]Q=mc\Delta T\\\\Q=mc(T_2-T_1)\\\\\dfrac{Q}{mc}=(T_2-T_1)\\\\T_2=\dfrac{Q}{mc}+T_1[/tex]
Put all the values,
[tex]T_2=\dfrac{250}{30\times 0.387}+22\\\\=43.53^{\circ} C[/tex]
So, the final temperature is equal to [tex]43.53^{\circ} C[/tex].
A lead mass is heated and placed in a foam cup caloriemeter containing 40.0mL of water at 17.0 C. The water reaches a temperature of 20.0 C. How many joules of heat were released by the lead?
the Answer is 502 Joules
The photos below show four pairs of objects.
Person and dog
Person and Earth
Person and building
Person and ball
Which pair of objects is experiencing the greatest gravitational force?
A. The person and the ball
B. The person and Earth
C. The person and the dog
D. The person and the building
Answer:
person and earth since they are closer to the core ? maybe
help me please guys #9
Answer:
Bases
Explanation:
Most soaps fall under the base category as they are slippery and will taste bitter if you taste it (DONT TRY IT THO).
What volume of hydrogen sulfide gas will be collected if
39.0 grams of sodium sulfide are reacted?
Answer:
yes
Explanation:
Answer:
578.....882...767..86
6. Calculate the new pressure in atm if 2.45 L of a gas at a pressure of 1.20 atm is contracted to a new
volume of 2.20 L
Answer:
[tex]\boxed {\boxed {\sf x \approx 1.34 \ atm}}[/tex]
Explanation:
Since we are dealing with temperature and pressure, we must use Boyle's Law. This states that the pressure is inversely proportional to the volume. The formula is:
[tex]P_1V_1=P_2V_2[/tex]
Where P is the pressure and V is the volume.
We know the original pressure (P₁) of the gas is 1.20 atmospheres and the volume (V₁) is 2.45 liters.
[tex]1.20 \ atm * 2.45 \ L = P_2V_2[/tex]
We also know the gas is contracted to a new volume of 2.20 liters (V₂) , but we do not know the pressure (P₂). We can use x.
[tex]1.20 \ atm *2.45 \ L = x * 2.20 \ L[/tex]
We can solve the left side of the equation and multiply.
[tex]2.94 \ atm *L= x*2.20 \ L[/tex]
We are trying to find the new pressure (x), so we must isolate the variable. It is being multiplied by 2.20 liters. The inverse of multiplication is division, so we divide both sides by 2.20 L.
[tex]\frac {2.94 \ atm *L}{2.20 \ L}=\frac{x*2.20 \ L}{2.20 \ L}[/tex]
[tex]\frac {2.94 \ atm *L}{2.20 \ L}=x[/tex]
The units of liters cancel.
[tex]\frac {2.94 \ atm}{2.20 \ }=x[/tex]
[tex]1.33636363636 \ atm =x[/tex]
The original measurements have 3 significant figures, so our answer should have the same. For the number we found, that is the hundredth place.
The 6 in the thousandth place tells us to leave the 3 in the hundredth place.
[tex]1.34 \ atm \approx x[/tex]
The new pressure is approximately 1.34 atmospheres.
Name the following alkyne.
Please help me <3
Answer:
D. 7-methyl-3-octyne
Explanation:
1) Identify the parent chain and name it like an alkane.
• The longest chain of carbons, which consists of the functional group (which is the alkyne group in this case: C≡C).
• There are 8 carbons in the longest chain, so it is called an octane.
2) Now, identify the location of the functional group.
• The location number of the functional group should be as low as possible. Thus although we could count from the right, we start counting from the left since the functional group is closer to the left. From the left, the functional group would be at carbon 8 while from the left, it is on carbon 3.
• Replace 'ane' with 'yne' in octane for the alkyne group.
• This would give us 3-octyne.
3) Lastly, add in the name of the branch.
• Here we have one branch, -CH₃. This is read as methyl.
• Identify the location number of the branch by counting the number of carbons in the same direction as when we counted the location number of the functional group. The methyl branch has a location number of 7.
• Adding the name of the branch before the parent chain, we would arrive at 7-methyl-3-octyne as the IUPAC name of the alkyne.
Further Explanation:
A) This option is incorrect as there are only 8 carbons in the parent chain. Although there are 9 carbons in total, the 9th carbon is taken care of in '7-methyl'.
B) Location number of the functional group should be as low as possible, so start counting the number of carbons from the left!
C) Since the functional group is an alkyne, the word 'octane' should be 'octyne' instead.
Convert 1.05 x 1026 molecules Ni to number of moles.
Answer:
1077.3 molecular in 1.05*1026 molecules
What type of wave has the SHORTEST wavelength and the highest frequency?
Answer:
The answer is gamma rays.
Explanation:
Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies on the electromagnetic spectrum.
If I receive links for an answer you will be reported. For me this is due today at 11:59 and I really need help please. I asked this question before but received no answer.
NaOH + AlCl3 --> Al(OH)3 + NaCI.
How many grams of AlCl3 are needed to produce 100.0 g NaCl?
Answer:
76.1g
Explanation:
The balanced equation for this reaction is as follows:
3NaOH + AlCl3 --> Al(OH)3 + 3NaCI
From the above equation, it can be observed that 1 mole of AlCl3 is needed to produce 3 moles of NaCl.
Using the formula below, we convert the mass of NaCl to moles;
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
mole = 100/58.5
mole = 1.71mol of NaCl
Since 1 mole of AlCl3 is needed to produce 3 moles of NaCl.
Then 1.71 moles of NaCl will be produced by 1.71/3 = 0.57mol of AlCl3
Molar mass of AlCl3 = 27 + 35.5(3)
= 27 + 106.5
= 133.5g/mol
Mole = mass/molar mass
Mass = molar mass × mole
Mass = 133.5 × 0.57
Mass = 76.1g
What is the name of this molecule?
Answer:
We are to name the compound:
Assuming carbon is represented by the big gray atoms while the smaller ones represents hydrogen atoms and the the red atom represents oxygen, the chemical formula of the compound is:
CH3CH2CH2OH
Define Acid and alkalis
Answer:
Acids have a pH less than 7. Acids contain lots of hydrogen ions
Alkalis have a pH greater than 7. Alkalis contain lots of hydroxide ions
Please mark as brainliest if answer is right
Have a great day, be safe and healthy
Thank u
XD
Answer:
ACID - A substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind. Often contrasted with alkali and base.
ALKALIS - A compound with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids; typically, a caustic or corrosive substance of this kind such as lime or soda: Often contrasted with acid and base.
Hope this helps
Which product is made from nonmetallic mineral resources?
a. Stainless steel
b. iron nails
c. Copper wires
d. concrete
Answer:
Concrete
Explanation:
PLZ HELP! An electron moved from a lower energy level to a higher energy level. What most likely happened during the transition?
Answer:
Explanation:B