does a fish's scales shred as the fish grows larger
Answer: No.
Explanation: Unless a disaster happens to their environment their scales will only grow.
Atoms of which pair of elements will form covalent bonds in a compound?
A. I and F
B. Be and CI
C. Na and Al
D. Ag and Ca
Answer:
A. I and F
Explanation:
The two element pair that will form covalent bonds in a compound are I and F.
A covalent bond is a bond type formed between two atoms of similar electronegativity difference. In fact, the electronegativity difference between the two atoms must be very small for covalency for occur.
Therefore such bonds are notable between non-metals. From the choices given, I and F are the only non-metallic pair. Therefore, they will form a covalent bond.Covalent bonds involves sharing of the valence electrons between two or more atoms to attain stability.
Metals are electropositive will not readily form covalent bonds.
how does an airplane’s kinetic energy and potential energy change as it takes off and lands? How does this energy change relate to the law of conservation of energy?
Answer: As the airplane goes higher, the mechanical energy is changed into gravitational potential energy. While flying, some energy is lost through drag to thermal (heat) energy and sound energy. Some is also lost as the plane makes the air around it move. ... As speed and height decrease, kinetic and potential energy decrease.
Explanation:
Hope this help
A student increases the temperature of a 673 cm^3 balloon from 275 K to 460 K.
Assuming constant pressure, what should the new volume of the balloon be?
Round your answer to one decimal place.
Answer:
1125.75 cm³
Explanation:
We are given;
Initial volume; V1 = 673 cm³
Initial temperature; T1 = 275 K
Final temperature; T2 = 460 K
From Charles law, we can find the new volume from;
V1/T1 = V2/T2
V2 = (V1 × T2)/T1
V2 = (673 × 460)/275
V2 = 1125.75 cm³
Name the following parts:
A—-
B——
C——
1. How many molecules are in 643.21 grams of
Mg3(PO4)22
2. How much space (Liters) does 4.061 x 10-24
molecules of H202 take up?
3. How many H20 atoms are in 479.3 grams of
H20 gas?
4. How many grams does 80.34 L of Ca(NO3)2
weigh?
5. How many Liters of space does 893.7 grams
of CO2 take up?
643.21g
1mol
10423
262.82g
6. How many grams are in 5139 x10425
molecules of AlOH)3
1
4.061x10^24
1 mol
Answer: Calculate the molar mass of Mg3(PO4)2 in grams per mole or search for a chemical formula or substance.
Missing: 643.21 Must include: 643.21. A balloon is filled with 36.2 liters of Cl2 gas at STP. How many moles of chlorine gas are inside? Solution: 36.2
Missing: 4.061 Must include: 4.061 .For H2O, there is one atom of oxygen and two atoms of hydrogen. A molecule can be made of only one type of atom. In its stable molecular form, oxygen exists as two atoms and is written O2. to distinguish it from an atom of oxygen molecule of three oxygen atoms, in grams per mole or search for a chemical ... Did you mean to find the molecular weight of one of these similar formulas- 80.34.
Explanation: PLEASE MARK ME AS BRAINLIEST!
What are the main organs of the muscular system?
The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles. It permits movement of the body, maintains posture and circulates blood throughout the body.
Answer:
Skeletal, cardiac muscles.
Explanation:
It helps move the body around. Your welcome :)
When two forces act on the same object in the same direction,
the net force is always less than the individual forces.
TRUE
FALSE
Answer:
false
Explanation:
15. In complete sentences, describe how electronegativity is related to polarity.
Explanation:
The absolute value of the difference in electronegativity (ΔEN) of two bonded atoms provides a rough measure of the polarity to be expected in the bond and, thus, the bond type. When the difference is very small or zero, the bond is covalent and nonpolar. When it is large, the bond is polar covalent or ionic.
Electrons in a polar covalent bond are shifted toward the more electronegative atom; thus, the more electronegative atom is the one with the partial negative charge. The greater the difference in electronegativity, the more polarized the electron distribution and the larger the partial charges of the atoms.
Answer:
The person above me is correct. Electronegativity relates to polarity by describing the attraction of electrons for an element. For example, Fluorine is most electronegative, so it has a high polarity. Polarity means a charge of hogging electrons. So yeah. There you go.
Explanation:
Which helps regulate the temperature range of the Earth's atmosphere? Water or Land
Answer:
The oceans atmosphere. AKA Water.
Explanation:
The oceans and the atmosphere are the two large reservoirs of water in the Earth's hydrologic cycle. The two systems are complexly linked to one another and are responsible for Earth's weather and climate. The oceans help to regulate temperature in the lower part of the atmosphere.
Earth's atmosphere get warm up by the temperature absorbed by the gases in the atmosphere. However it can balanced water in earth such as ocean currents and cooling.
What is ocean currents?Ocean currents are formed from the pressure difference in ocean level and thus in day time there will be winds from ocean to land which cools the earth's surface.
Surface of the earth warms up by absorption of heat energy from sun. This warming will be higher if there are more greenhouse gases such as carbon dioxide, methane oxides of nitrogen, Sulphur etc.
Greenhouse gases intensely absorbs the temperature from radiation and thus increase the temperature of earth's surface. These gases are mainly evolved to the atmosphere by industries and factories.
Other factor which affects the temperature of earth surface include wind, ocean level etc. The level of ocean and ocean currents helps to regulate the temperature of the surface and make it cool.
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Explain how Coulomb's law can help you understand why some interparticle forces are stronger than others.
Answer:
Coulombs equation involves distance and the distance from one radius to the next allows us to predict certain characteristics such as pull and attraction. For example, you would expect, a higher charge on the ion and a higher dipole moment causes a larger force. This is due to the magnitude which is the distance between these two and effectively that is how Columbus law comes into play.
Coulomb's law states that the force of repulsion or attraction among both two charged bodies is directly proportional to the product of their charges as well as inversely proportional to the square of the length between them.
What is Coulomb's law?An electric force is created when two charged particles collide. The forces will be greater if you have larger charges.
Coulomb's Law can be understood by combining these two ideas and the fact that charges can attract and repel each other. It is a formula for calculating the electrical forces between two objects.
Coulomb's equation involves distance, and the distance between two radiuses allows us to predict certain characteristics such as pull and attraction.
As you might expect, a higher charge on the ion and a higher dipole moment result in a greater force. This is due to the magnitude of the distance between these two, and this is where Columbus law comes into play.
Thus, this way, Coulomb's law can help you understand why some interparticle forces are stronger than others.
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Mendeleev's proposal of periodic table was based on:
The proposal of the periodic table was based upon properties that appeared with some regularity by laying out the elements from lightest to heaviest.
[hope this is helpful!:))]
what is the idea behid boyles law
Answer:
Explanation:
For a fixed mass of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship. If volume increases, then pressure decreases and vice versa, when the temperature is held constant.
What is responsible for an inherited trait? a. Environment b. Cells C. Dna d. Nutrition
Answer:DNA
Explanation:Dna
The distance from the crest of one wave to the crest of the next wave.
A. microwaves
B. longitudinal
C. wavelength
D. electromagnetic
E. gamma rays
F. mechanical
Answer:
wavelength
Explanation:
What is the temperature change that 725 g of aluminum will undergo when 2.35 x 104
J of thermal energy are added to it?
Answer:
36°C
Explanation:
Given parameters:
Mass of aluminum = 725g
Quantity of heat = 2.35 x 10⁴J
Unknown:
Temperature change = ?
Solution:
To solve this problem, we simply use the expression below:
The quantity of energy is given as:
Q = m C Δt
Q is the quantity of energy
m is the mass
C is the specific heat capacity of aluminum = 0.9J/g°C
Δt is the change in temperature
The unknown is Δt;
Δt = [tex]\frac{Q}{mc}[/tex] = [tex]\frac{2.35 x 10^{4} }{725 x 0.9}[/tex] = 36°C
Low, gray, layered clouds that cover the sky and bring steady rain are O A. cumulus O B. cirrus O C. cumulonimbus OD. nimbostratus
Answer:
D Nimbostratus
Explanation:
pls help
20020200202
tell me what to do dudette
a container with a volume of 2.5L contains air at a pressure of 0.5 atm. if the volume is reduced to 1.5L at constant temperature, what will be the resulting pressure of the air inside
Answer:
Final pressure of the air inside is 0.83atm
Explanation:
Boyle's law is the gas law that relates the change in volume when pressure change at constant temperature and vice versa. The equation is:
P₁V₁ = P₂V₂
Where P is pressure and V is volume of 1, initial state and 2, final state of the gas
Replacing:
P₁ = 0.5atm
V₁ = 2.5L
P₂ = ?
V₂ = 1.5L
P₁V₁ = P₂V₂
0.5atm*2.5L = P₂*1.5L
0.83atm = P₂
Final pressure of the air inside is 0.83atm
What part of the atom contains the protons and neutrons?
why are properties of covalent compounds so diverse
Answer:
The diversity of physical properties among covalent compounds is mainly because of widely varying intermolecular attractions. ... All of the atoms are covalently bonded to each other.
The decomposition of 65.9 g ammonium nitrate yields how many liters of dinitrogen monoxide at 2.65 atm and 303 k?
(N= 14.01 g/mol, H= 1.008 g/mol, O=16.00 g/mol)
NH4NO3(s) -> N2O(g)+2H2O(g)
Hint: R = 0.0821 L atm/(mol K)
It’s 7.72 it took a while but I found the answer
Which of the following interactions would be the weakest?
Picture provided, 10 points. Please only answer correctly.
Answer:
D.) Li+ and C4H10
i hope it helped.
If 50.0g of kcl reacts with 50.0 g of 02 to produce KCLO3 according to the following equation, how many grams of kclo3 will be formed
Answer:
Mass = 82.11 g
Explanation:
Given data:
Mass of KCl = 50.0 g
Mass of O₂ = 50.0 g
Mass of KClO₃ produced = ?
Solution:
Chemical equation:
2KCl + 3O₂ → 2KClO₃
Number of moles of KCl:
Number of moles = mass /molar mass
Number of moles = 50.0 g/ 74.5 g/mol
Number of moles = 0.67 mol
Number of moles of O₂:
Number of moles = mass /molar mass
Number of moles = 50.0 g/ 32 g/mol
Number of moles = 1.56 mol
Now we will compare the moles of oxygen and KCl.
O₂ : KClO₃
3 : 2
1.56 : 2/3×1.56 = 1.04 mol
KCl : KClO₃
2 : 2
0.67 : 0.67
Number of moles of KClO₃ formed by KCl are less thus, it will act as limiting reactant.
Mass of KClO₃:
Mass = number of moles × molar mass
Mass = 0.67 mol ×122.55 g/mol
Mass = 82.11 g
Old thermometers contained very small amounts of mercury. The mercury in the photo has a melting point of -38.8 degrees Celsius. What can you conclude about the melting point of the mercury in old thermometers? *
It's melting point can only be determined when the mercury is burned.
It's melting point changes as the temperature of mercury changes.
It's melting point equals -38.8 degrees Celsius because it is mercury.
It's melting point is less than -38.8 degrees Celsius because its volume is smaller.
Answer:
••It's melting point equals -38.8 degrees Celsius because it is mercury. |••
Explanation:
This one makes the most sense out of the answers.
How many moles of HCl are needed to react with 0.87 mol Al?
There are 2.6 moles HCl are needed to react with 0.87 mol of Al.
What is mole?The mole would be an equivalent to Avogadro's number in terms of chemistry units.
What is HCl?HCl is a mixture of hydrogen and chlorine .
The reaction between the HCl and Al is shown as:
Al + HCl → AlCl3 + H2
By balancing the above equation.
2Al + 6HCl → 2AlCl3 + H2
It can be seen that there are 2 mole Al will be reacted with 6 mole of HCl hence, 0.87 mole Al will be react with 2.6 mole of HCl.
Therefore, there are 2.6 moles HCl are needed to react with 0.87 mol of Al.
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need a quick answer please
Answer:
10.1802
Explanation:
Answer: i dk. Tbh
Explanation:
What’s the charge of a neutron?
Answer:
NUETRAL
Explanation:
........................................
A certain chemical contains 46.30% chlorine, 47.05% carbon, 6.63% hydrogen. What is the molecular formula of the compound? The molar mass of the compound was determined to be 153.052g/mol.
C6H10CI2
C6H8CI2
C3H5CI
C4H4CI
C8H8CI2
Answer:
C6H10Cl2
Explanation:
Convert mass % to mass
100g of the compound contains from each elements: 46,3g Cl; 47,05g C and 6,63g H
Molar mass
Cl = 35.5 g/mol
C = 12 g/mol
H = 1 g/mol
Find the number of moles:
Chlorine: 46.4g /35.5g/mol = 1,3 moles
Carbon: 47,05g/12 g/mol = 3,92 moles
hydrogen: 6,63g/1g/mol = 6,63 moles
Molar fraction:
Cl = 1,30/ 1,30 = 1
C = 3,92/ 1,30 = 3,01
H = 6,63/ 1.30 = 5,01
C3H5Cl = 76,5 g/ mol x 2 = 153 g/ mol
So multiply the molecular formula by two = C6H10Cl2
what do igneous rocks become when they break down and settle into layers?
Answer:
Sedimentary rocks
Explanation:
Igneous rocks will become sedimentary rocks when they break down and settle into layers .
Igneous rocks are rocks that are formed by the cooling and solidification of magma within or on the earth crust.
When agents of weathering and denudation forces acts on a rock body, they break them down producing sediments in the process.
Sediments are transported into depositional basins where they are laid down and cemented together. This in turn forms sedimentary rocks. The break down and settling of sediments leads to the formation of sedimentary rocks.