Red blood cells are red because they contain Haemoglobin
gases are also good conductors of electricity in discharge tube at
1)high pressure high voltage
2) low pressure low voltage
3) low pressure high voltage
4) never
pls help wil marks as brainliest
Answer:
3)low pressure and high voltage
Can anyone help me with this assignment? Will give Brainliest.
Answer:
i cant get the pdf im so sorry
Explanation:
Answer:
Yes if u need help?
Explanation:
1) What type of molecule is water and why? Show its lewis structure, shape, and
explain what type of compound it is in terms of bond type and symmetry.
2) Which part of the water molecules will attract to the negatively shared balloon
and why? Show how the water molecule aligns itself to the negative part of the
balloon.
(PLeASE HeLP)
Answer:
I DO NOT UNDERSTAND THE QUESTION, BUT THANKS FOR THE COINS/TOKENS!
Explanation:
How do parasites affect their hosts?
They help their hosts by consuming or using their cells.
They help their hosts by growing in size.
O They harm their hosts by growing in size.
They harm their hosts by using their hosts as a food source.
Is the reaction balanced?
Answer:
No
Explanation:
thermal pollution is when the temperature of a body of water is increased due to warmer water being added.
true or false
Answer:
true
Explanation: pull in relatively cool water to cool their machinery and let the relatively warm water flow back into the river or lake or sea. ... Water on hot paved surfaces gets hot, then runs off into nearby bodies of water, raising the water temperature
Answer:
True
Explanation:
Heat is classified as is classified as a water pollutant when it is caused by heated industrial effluents or from anthropogenic (human) alterations of stream bank vegetation that increase the water system temperatures due to solar radiation.
Hope that helps
What is the name of this molecule?
O A. 1-methylpentane
O B. 1-pentyne
C. cis-1-pentene
O D. Pentane
Answer:
The name of that molecule should be 1-pentyne
so your answr should be B
Explanation:
Molecules are species made up of atoms. The given molecule in the figure is 1-pentyne. Thus, option B is correct.
What is 1-pentyne?1-Pentyne is a chemical compound with the formula C₅H₈, and an internal alkyne group between the first and the second carbon atom.
The molecules consist of twelve bonds including the bonds between the carbon-carbon, and carbon-hydrogen. There is one triple or the alkyne bond present and five carbon hence the name of the molecule is 1-Pentyne.
Therefore, the molecule is option b. 1-Pentyne.
Learn more about 1-Pentyne here:
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HELLPP!!!
What property allows objects to be subject to gravity?
friction
mass
inertia
acceleration
Answer: i gotcu the answer is mass
Explanation: The more weight of the object the more its subject to gravity like a feather barley is while a bowling ball smashes into the ground :D
The property allows objects to be subject to gravity is mass. Therefore, option B is correct.
What is mass ?Mass is a physical body's total amount of matter. Inertia, or the body's resistance to acceleration when a net force is applied, is also measured by this term.
The strength of an object's gravitational attraction to other bodies is also influenced by its mass. The kilogram serves as the SI's fundamental mass unit. The amount of matter object present is also known as mass.
The amount of matter that makes up every item or body is the greatest way to understand mass. Everything that we can see has mass. Examples of objects with mass include a table, a chair, your bed, a football, a glass, and even air. The mass of a thing determines whether it is light or heavy.
Thus, option B is correct.
To learn more about mass follow the link below;
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anyone know how to do this?
5. A boat travels 325,000 meters in 800 seconds. What was its speed?
Answer:
406m/s
Explanation:
Speed = distance ÷ time
Answer:
406 m/s
Explanation:
Divide 325,000 meters by 800 and 800 seconds by 800 (because we are trying to find the speed in meters per second.
325,000÷800 = 406.25 meters
800÷800 = 1 second
≈ 406 m/s
true or false the membrane of rer is continuous with the outer layer of the mithochondrial membrane
Answer:
false
Explanation:
If 276 g of dinitrogen tetroxide and 64.0 g of hydrazine are mixed, how many grams of nitrogen gas can you produce?
Answer:
84 g of N₂
Explanation:
We begin from the reaction:
N₂O₄ + 2N₂H₄ → 3N₂ + 4H₂O
1st step: Find out the limiting reactant.
We convert the mass to moles.
276 g . 1mol/ 92g = 3 moles of N₂O₄
64 g . 1mol / 32g = 2 moles of hidrazine
Limiting reactant is the hydrazine. Ratio is 1:2, then for 3 moles of tetroixde I may need 6 moles of N₂H₄. (But I only have 2).
To determine the grams of produced nitrogen we see stoichiometry (2:3)
2 moles of hydrazine can produce 3 moles of N₂
Definetaly our 2 moles make 3 moles of gas.
We convert the moles to mass.
3 mol . 28g /1mol = 84 g of N₂
What are mineral acids?
Answer:
mineral acids are obtained from one or more inorganic compounds which is a compound that lacks carbon and hydrogen bonds. Inorganic compound examples include water and carbon dioxide. Something all mineral acids do is form hydrogen ions and the joined together bases when it is dissolved in water.
Explanation:
20 mL of NaOH solution was added to the conical flask. Indicator was added & titrated with 0.1 M HCl solution. The HCl used in the titration was read as 18.3 mL. What is the molar concentration of NaOH?
Answer:
[NaOH] = 0.1 Molar ... Note => the brackets around formula;i.e., "[ ]" is generally accepted in the chemistry community as concentration in Molar terms.
Explanation:
The metathesis rxn, or double replacement rxn, equation is:
(Molarity x Volume) of acid = (Molarity x Volume) of base, or
(M·V)acid = (M·V)base => M(base) = M·V(acid)/V(base)
= 0.1M × 18.3ml / 20ml = 0.0915M(base) = 0.1M (1 sig-fig) = [NaOH]
Identify the type of intermolecular force for water, vegetable oil, and corn syrup.
Answer:
Intermolecular force for oil the dipole-dipole.
Intermolecular force for water hydrogen bonds.
Intermolecular force for vegetable oil nonpolar compound.
Intermolecular force for corn syrup fructose.
4 description of meteor showers
Answer:
A meteor shower are defined as the celestial event in which a meteor comes from one point in the sky and visible in night sky.
Meteors are also known as Shooting stars as they glow when enters in the Earth surface as glowing streaks, where tail point to the origin in the sky and face faces the Earth surface.
Meteor showers take place when meteoroids entering Earth's atmosphere.
Meteor showers can repeat themselves because it depends on the comet orbits which can take place at the same time each year.
what's the answer? please help
Answer:
a usually reversible change in the physical properties of a substance, as size or shape
For example:
Freezing a liquid is a physical change.
Answer:I like bread
I like ya cut G
So that's step by step solution to get to the answer
A chemist analyzes two samples. One sample contains 14g of element x and 6.0 g of element y. The second sample contains 28 g of element x and samples are the same substance
Answer:
Explanation:
Here's the complete question:
A chemist analyzes two samples.One sample contains 14g of element x and 6.0g of element y.The second sample contains 28g of element x and 6.0g of element y. Does it appear that the two samples are the same substance?
The two samples that we are given in the question are different. They are not the same thing because we can deduce that their components ratio are different.
Sample One contains 14g of element x and 6.0g of element y. The ratio of element x to y is 14/6 = 7/3 = 7:3.
Sample Two contains 28g of element x and 6.0g of element y. The ratio of element x to y is 28/6 = 14/3 = 14:3.
Therefore, they have different ratio for their components and are therefore not thesame.
The F1-ion is classified as a(n).
and has:
A.anion, 1 valence electron
B.anion, 8 valence electrons
C.cation, 2 valence electrons
D.cation, O valence electrons
Answer:
B
Explanation:
The [tex]\rm \bold{F^1^-}[/tex] is the fluorine anion with 8 valence electrons. Hence, option B is correct.
An ion is defined as the atom with the change in the valence electrons by the loss or gain of electrons to complete the outer shell.
What type of ion is [tex]\rm F^1^-[/tex]?The ions with the gain of electrons result in a negative charge and are termed anions. The ions with a loss of electrons have a positive charge and are termed cations.
The F is the halogen atom of group 17 with 7 valence electrons. The ion formed for F requires 1 electron to complete its valence shell.
The ion [tex]\rm F^1^-[/tex] has a negative charge, which denotes it gains an electron and forms anion.
The gain of electrons results in the number of valence electrons being 8.
Thus, [tex]\rm F^1^-[/tex] is the fluorine anion with 8 valence electrons. Hence, option B is correct.
Learn more about ions, here:
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every time atoms form a new bond, the reaction releases____
A) Time
B) Muir
C) Energy
Answer:
c. energy
Explanation: an atom increases negative charge put frustration/ stress on other electrons causing alot of energy to be released.
PLS HELP *10 POINTS* I WILL GIVE BRAINLIEST
Answer:
Eurkaryote... sorry if i wrong
Explanation:
What category of organisms makes up the largest percent of the the fossils discovered? A. Land animals B. Marine animals C. Microorganisms
Answer:
Marine animals
Explanation:
A fossil is any remains of ancient life. Fossils can be body fossils, which are remains of the organism itself or trace fossils, such as burrows, tracks, or other evidence of activity(Lumen Learning).
Fossils of land animals are less common because they may not have been buried. However, land organisms may become buried underneath by mudslides or ash from a volcanic eruption, or covered by sand in a sandstorm.
Marine fossils are more common owing to quick burial. Marine animals that die near a river delta may be buried by sediment carried by the river. A storm at sea may shift sediment on the ocean floor, covering and helping to preserve skeletal remains(Lumen Learning).
consider a sample of compound contain 1.719c 0.284gh so find emprisical formula
BALANCE THE FOLLOWING EQUATION
1.) Sc(C2H3O2)3 + Na3BO3 = NaC2H3O2 + ScBO3
2.) Ba3(PO4)2 + Ca2SiO4 = Ba2SiO4 + Ca3(PO4)2
Answer:
1) Sc(C2H3O2)3 + Na3BO3 = 3 NaC2H3O2 + ScBO3
2) 2 Ba3(PO4)2 + 3 Ca2SiO4 = 3 Ba2SiO4 + 2 Ca3(PO4)2
Cu + HNO3 --> Cu(NO3)2 + NO + H2O
how to balance... WILL GIVE 15 POINTS
Answer:
3 Cu + 8 HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O
Explanation:
Make sure both sides are equal
3 Cu + 8 HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O
// start by those elements that change their oxidation degree
Cu and N
// also you can write reduction-oxidation reactions
[tex]Cu^{0}[/tex] + 2 [tex]e^{-}[/tex] --> [tex]Cu^{-2}[/tex] | 2
[tex]N^{+5}[/tex] - 3 [tex]e^{-}[/tex] --> [tex]N^{+2}[/tex] | 3
// write the numbers of electrons that are lost/gained as the coefficients of the opposite elements
// then check if H and O are the same on both sides
// adjust if they aren't.
Answer:
Explanation:
3Cu + 2HNO3 --> 3Cu(NO3)2 + 2NO + 2H2O
6) Mr. Collins finally decided to take this seriously and put both hands on the rope and applied a 500 N force to the left,
while Jared and James still struggled with their 300 N force to the right. What is the net force and direction of motion?
Answer:
I'm pretty sure the net force is 200 N and the direction of motion is left
Explanation:
500 - 300 = 200 and more force is coming from and pulling toward the left.
please help... will give brainiest
Answer:
The answer will be ：
In year 1869
Russian scientist named Dmitri Mendeleev
Chart called Mendeeleves periodic table
increasing atomic masses
physical and chemical properties.
Hope this Helps
Best of luck ！！
How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction SiO2(g) + 3C(s) → SiC(s) + 2CO(g) ΔH° = 624.7 kJ/mol?
Answer:
31.24 kJ
Explanation:
SiO₂(g) + 3C(s) → SiC(s) + 2CO(g) ΔH° = 624.7 kJ/molFirst we convert 3.00 grams of SiO₂ to moles, using its molar mass:
3.00 g SiO₂ ÷ 60.08 g/mol = 0.05 molNow we calculate the heat absorbed, using the given ΔH°:
If the complete reaction of 1 mol of SiO₂ absorbs 624.7 kJ, then with 0.05 mol:
0.05 mol * 624.7 kJ/mol = 31.24 kJ of heat would be absorbed.The heat absorbed by 3.00 grams of SiO2 is 31.17 kJ/mol.
The thermochemical equation is;
SiO2(g) + 3C(s) → SiC(s) + 2CO(g) ΔH° = 624.7 kJ/mol
The number of moles of SiO2 = 3.00 g/60.08 g/mol = 0.0499 moles
From the reaction equation;
1 mole of SiO2 absorbs 624.7 kJ/mol
0.0499 moles SiO2 absorbs 0.0499 moles × 624.7 kJ/mol/1 mole
= 31.17 kJ/mol
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Which statements describe band theory? Check all that apply.
Electrons all have approximately the same energy.
Electrons move among orbitals of different energies.
Electrons move freely among atoms (delocalized).
Answer:
b c
Explanation:
right
Answer:
it was A C for me
Explanation:
The yellow light given off by a sodium vapor lamp has a wavelength of 589nm. What is the frequency of this radiation? Please show all work.
Answer:
5.09 x 10⁶ s⁻¹ = 5.09 x 10⁶ Hz
Explanation:
The relation between frequency (ν) and wavelength (λ) is given by:
λ = c/ν
where c is the speed of light (2.998 m/s) and it is a constant.
So, we first convert the wavelength from nanometers (nm) to meters (m) (1 nm = 1 x 10⁻⁹):
λ= 589 nm x (10⁻⁹ nm/1 m) = 5.89 x 10⁻⁷ m
Then, we calculate the frequency from the equation:
λ = c/ν ⇒ ν = c/λ = (2.998 m/s)/(5.89 x 10⁻⁷ m) = 5.09 x 10⁶s⁻¹ = 5.09 x 10⁶ Hz
