Electrons in the Bohr model follow the number of elements in the rows of the periodic table.
2 in the first orbit
8 in the second and third ring
18 in the fourth etc...
The Bohr model is a simplistic means of explaining the placement of the subatomic particles of the elements of the periodic table.
The Bohr model arrangement of electrons follows the same pattern as the periodic table.
2 elements in the first row, and 2 electrons in the first orbit.
8 elements in the second row, and 8 electrons in the second orbit.
8 elements in the third row, and 8 electrons in the third orbit.
The fourth and fifth orbits would therefore hold 18 electrons.
For most chemists, the Bohr model does not work well beyond the third row of the periodic table because the model becomes quite oversized and bulky.
Given the following list of densities, which materials would float in a molten vat of lead provided that they do not themselves melt? Densities: g/mL: lead= 11.4; glass= 2.6, gold= 19.3, charcoal= 0.57, platinum = 21.4. Enter your answer as a word only. If two or more items would float include the word and between those two items.
The materials that would float in a molten vat of lead are glass and charcoal.
Which material floats on the solution?Glass and charcoal are the materials that would float in a molten vat of lead because they are less denser than the lead solution while on the other hand, platinum and gold get drowned into the solution because of its high density as compared to lead.
So we can conclude that the materials that would float in a molten vat of lead are glass and charcoal.
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vinegar contains 5g of acetic in 100mL of solution so the (w/v)% concentration is:
The (w/v)% concentration of vinegar contains 5g of acetic in 100mL of solution is approx 0.5 %
What is Concentration ?The concentration of a chemical substance expresses the amount of a substance present in a mixture.
There are many different ways to express concentration.(w/v)% is one of them.
Given ;
Mass of solute(acetic acid) is 5.0 g Volume of solution is 100.0 mL.
We need to convert the grams of acetic acid to moles ;
Formula of acetic acid is CH₃COOH
Thus,
Molar mass of acetic acid = 2(12.01) + 4(1.01) + 2(16)
= 24.02 + 4.04 + 32
= 60.06 grams per mol
Moles of acetic acid = 5.0/60.06
= 0.083 moles
(w/v)% = 0.083 x 60 / 1000 x 100
= 0.498 %
= 0.5 %
Hence, The (w/v)% concentration of vinegar contains 5g of acetic in 100mL of solution is approx 0.5 %
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If 142.5 g of liquid in the coffee-cup calorimeter rises 8.00 °C, how much heat is released by the neutralization reaction?
Q=mcΔt
Q=142.5 x 4.18 x 8
Q = 4.765 x 10³ J
Which of the following separation techniques uses boiling points to separate the components of a mixture:
a. Filtration
c. Chromatography
b. Distillation
d. Magnetism
Option (b) is correct.
Some separation techniques are given below:- (a) FiltrationA separation technique called filtration is used to isolate pure chemicals from mixtures of particles, some of which are big enough to be caught by a porous medium.
(b) DistillationThe separation of combinations of two or more pure liquids is accomplished through distillation. The components of a liquid mixture are vaporized, then condensed and isolated during the purifying process of distillation.
(c) ChromatographyChromatography is the process of separating a mixture by passing it through a medium where the components move at various speeds, either in solution, suspension, or as a vapor (as in gas chromatography).
(d) MagnetismThe magnetic separation process involves attracting magnetic materials using a magnet to separate the components of mixes. Non-magnetic compounds are separated from magnetic ones using the magnetic separation technique.
From the above separation techniques, we can say that option(b) Distillation a separation process that uses boiling points to separate the component of a mixture is correct.
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In your own words, explain why a study published a cereal company that finds that breakfast is the most important meal of the day is likely to contain bias.
Magnesium burns in air with a dazzling brilliance to produce magnesium oxide: 2 Mg(s) + O2(g) → 2 MgO(s) How many moles of O2 are consumed when 2.10 mol of magnesium burns?
Answer:
1.05 mols of O2 gas
Explanation:
For this type of problem, it's important to understand what the balanced Chemical equation tells us:
Balanced Chemical equationsLet's look at the balanced chemical equation:
[tex]2Mg(s)+O_2(g)-- > 2MgO(s)[/tex]
This equation two sides of the reaction arrow. On the left are the reactants (things you start with, and that react during the chemical reaction), and on the right side are products (things that are produced during the chemical reaction that you end with).
The numbers in front of each compound tell how many of molecules are involved for a full reaction without anything left over. A "mol" is a large quantity ([tex]6.022*10^{23}[/tex]), in this case, of molecules , since it's unlikely you're only taking a single molecule of each substance (it would be so tiny, you wouldn't even know you were doing the reaction).
So,for every 2 moles of Magnesium used, we'll also need 1 mole of Oxygen, and it will produce 2 moles of Magnesium Oxide.
In a way, during the reaction it's almost like 2 moles of Magnesium is equal to 1 mole of Oxygen and is equal to 2 moles of Magnesium Oxide:
[tex]2 mol Mg(s)=1mol O_2(g)=2molMgO(s)[/tex]
From here, we can build some unit ratios, to convert between the known quantity of moles we have, and find the unknown quantity of moles that are requested.
Finding the right unit ratioWe know that we are looking at 2.10 mol of Magnesium, so we want a unit ratio with moles of Mg on the bottom. We want to find moles of O2, so we want a unit ratio of moles of O2 on top.
The unit ratio we want is the middle part of the equation, divided by the left part of the equation.
[tex]2 mol Mg(s)=1mol O_2(g)\\\frac{2 mol Mg(s)}{2 mol Mg(s)}=\frac{1mol O_2(g)}{2 mol Mg(s)}\\1=\frac{1mol O_2(g)}{2 mol Mg(s)}[/tex]
Since this quantity is 1, it is a unit ratio and can be multiplied to other things to change their units (for this problem).
Finding the answerStarting with what we know, and multiplying by our unit ratio:
[tex]2.10 mol Mg(s)*\frac{1mol O_2(g)}{2 mol Mg(s)}=1.05mol O_2(g)[/tex]
Notice that the units from the first quantity cancel with the units on the bottom of the fraction, leaving only the unit on top of the fraction ... the exact units we wanted!
So, 1.05mols of O2 would be consumed during the reaction if exactly 2.10moles of Magnesium are burned.
Data are often arranged to highlight particular patterns. What other ways might you arrange the data shown in the Sample of Elements table?
The data shown in the Sample of Elements table can be arranged on basis of physical and chemical properties , atomic number , atomic weight , etc .
The data shown in the Sample of Elements table can be arranged in various ways :
On basis of similarity among physical and chemical properties of several groups of three elements , as done by Johann Dobereiner in early 1800’s .On basis of increasing atomic wieghts , as done by A.E.B. de Chancourtois in 1862 and english chemist, John Alexander Newlands in 1865.On basis of the physical properties such as atomic volume, melting point and boiling point against atomic weight as done by Lothar Meyer .On basis of atomic no. as done by the English physicist, Henry Moseley in 1913.Learn more about Sample of Elements table here https://brainly.com/question/15987580
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What types of bonds and atoms are in the molecule shown below?
H₂C
C=C
H
CH₂-CH3
H
O A. Double bonds, triple bonds, carbon atoms, and hydrogen atoms
O B. Double bonds, triple bonds, carbon atoms, and helium atoms
OC. Single bonds, double bonds, carbon atoms, and hydrogen atoms
OD. Single bonds, double bonds, carbon atoms, and helium atoms
The types of bonds and atoms in the molecule shown below are C. Single bonds, double bonds, carbon atoms, and hydrogen atoms.
How many bonds can carbon form?Carbon can only form a bond with a maximum of 4 other molecules.
We have been given a molecule
H₂C CH₂-CH3
C=C
H H
In the given figure we can see that the molecule includes one double bond and other are single bonds.
Thus, The types of bonds and atoms in the molecule shown below are C. Single bonds, double bonds, carbon atoms, and hydrogen atoms.
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Which of the following is a heterogeneous mixture?
a) milk
b) air
c) oil and vinegar
d) vinegar in water
Answer:
c) oil and vinegar
Explanation:
A heterogeneous mixture is a mixture that does not have a "uniform composition" (meaning that the entire mixture is not thoroughly mixed to be the exact same. In different parts of the mixture, there is a non-consistent / differing composition.)
Oil and vinegar, as you may know, do not thoroughly mix when put together--different parts of the mixture are made of different compositions. Some parts are made of oil, and some are a concentration of vinegar, but because they are not able to be mixed entirely, the mixture is considered a heterogeneous mixture. If you were to take different samples of different parts of the liquid, you would have a clear separation of oil and vinegar.
Milk is thoroughly milk--if you take out a tablespoon, it will be milk entirely--and it will have the same composition as all of the other milk in the bottle.
Air is complicated--and it can be described as either, but the question was likely intending the answer of oil and vinegar.
Vinegar and water do thoroughly mix. Vinegar absorbs water on a molecular level, so the mixture is thoroughly mixed when put together.
(Hope this helps!)
Number of molecules in .99 mol C6H5NO2
Answer:
5.96 * 10^23 molecules
Explanation:
Don't start counting up the number of CsHsNs and Os there are Counting up the atom ions will get a wrong answer. The question is asking for the number of molecules. That means you do not break down each molecule to find the number of molecules. You modify 1 mol to find out how many molecules are in 0.99 mols. Do that using a proportion.
1 mol contains 6.01 * 10^23 molecules
0.99 mol contains x
1/0.99 = 6.02 * 10^23 / x molecules
x = 0.99 * 6.02 * 10^23
x = 5.96 * 10^23
If heat is added to 25.0g of copper, calcium, aluminum, iron, lead what will have the highest final temperature
Lead will have the highest temperature .
What is Specific Heat ?
Specific Heat is defined as the amount of heat required to raise the temperature of a 1 gm of substance by 1 degree Celsius.
If heat is added to 25.0g of copper, calcium, aluminum, iron, lead
The missing given specific heat is
Copper, 0.377
Calcium, 0.656
Aluminum, 0.895
Iron, 0.448
Lead, 0.129
Higher specific heat means more temperature required to bring the same amount of change in temperature
Here the temperature change is fixed , The metal with the lowest Specific heat will have the highest temperature.
From the data it can be seen that
Specific Heat of Lead, 0.129
Therefore Lead will have the highest temperature.
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PLEASE HELP CHEMISTRY!!!! Will give brainiest
Show work pls.
2 moles of ZnO are produced if 1 mole of Zn and 2 moles of [tex]O_2[/tex] is required.
What are moles?A mole is defined as 6.02214076 × [tex]10^{23}[/tex] of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Balanced equation:
[tex]2 Zn + O_2[/tex] → [tex]2 ZnO[/tex]
For 2 moles of Zinc, we need 1 mol of Oxygen to produce 2 moles of Zinc oxide
For 1 mole Zn, we need 2 mol [tex]O_2[/tex] to produce 2 moles ZnO only.
Hence, 2 moles ZnO is produced.
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What mass of carbon monoxide is required to react completely with 318g of iron(III) oxide?
The balanced equation for this reaction is [tex]3\text{CO}+\text{Fe}_{2}\text{O}_{3} \longrightarrow 2\text{Fe}+3\text{CO}_{2}[/tex].
This means that for every mole of iron(III) oxide consumed, 3 moles of carbon monoxide are consumed.
Iron has an atomic mass of 55.845 g/mol.Oxygen has an atomic mass of 15.999 g/mol.This means that iron(III) oxide has a formula mass of 2(55.845)+3(15.999)=g/mol, and thus 318 g is equal to [tex]\frac{318}{159.687}=1.9913956677751 \text{ mol}[/tex].
So, this means we need [tex]3(1.9913956677751)=5.9741870033253 \text{ mol}[/tex] of CO.
Carbon has an atomic mass of 12.011 g/mol.Oxygen has an atomic mass of 15.999 g/mol.This means CO has a formula mass of 12.011+15.999=28.01 g/mol, and thus 5.9741870033253 moles have a mass of (28.01)(5.9741870033253), which is equal to about 167 g (to 3 sf)
I need help with this one bad
Explanation:
it applies to pressure laws
reaction of cysteine and NaOH
Answer:
cysteine is HOOC-CH--CH₂-SH
reaction with Naoh
HOOC-CH--CH₂-SH + Naoh ---->oh-oNH2-oh + H2o
Which quantity could best be measured with a meter stick?
A.
the amount of matter in a rock
B.
the width of a wooden block
C.
the volume of water in a cup
D.
the diameter of the Earth
Answer:
B
Explanation:
A meter stick measures distances ( like centimeters) so....B
it does NOT measure mass , volume or VERY large distances (Like earth's diameter)
The quantity could best be measured with a meter stick will be "the width of a wooden block".
What is meter stick?The measurement tool is known as a "meter stick" would be used to measure objects in meters and millimeters.
What is wooden block?A single new piece of wood would be used to create a miniature slit drum known as a wood block.
An instrument for measuring lengths in meters and centimeters is a meter stick, which measures one meter (hundred centimeters). A meter stick can be used to measure things such as the width of a bag or the length of a table.
The quantity that could best be measured with a meter stick will be "the width of a wooden block".
Therefore, the correct answer will be an option (b)
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Compared to infrared radiation, an electromagnetic wave that has a lower frequency will also have a ________.
longer wavelength and lower speed
longer wavelength and equal speed
shorter wavelength and lower speed
shorter wavelength and equal speed
Compared to infrared radiation, an electromagnetic wave that has a lower frequency will also have a longer wavelength and equal speed
What is Electromagnetic wave ?Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field.
It can be also defined as waves are composed of oscillating magnetic and electric fields.
One important feature fo electromagnetic radiation is that all have the same speed in vacuum, c, in vacuum, which is the speed of light.
Since, the speed, wavelength and frequency of the waves are related you can infere any of them when the other two are known.
The equation is:
speed = frequency × wavelength
s = ν × λ
c = ν × λ . . . for the specific case of electromagnetic radiation
That inverse relation between frequency and wavelength, where the speed is the constant, shows that the lower the frequency the longer the wavelength.
Therefore, the correct statment is that an an electromagnetic wave that has a lower frequency will also have a longer wavelength and equal speed (option B).
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Helium is which of the following types of matter?
element
mixture
molecule
compound
Answer:
element.....
it is in the periodic table
Which of the following is an unsafe lab behavior?
a. Wearing loose comfortable clothing so you can concentrate on the lab.
b. Tying back long hair so it stays in place.
c. Wearing close toe shoes.
d. Reading all instructions before beginning.
Answer: A. Wearing loose comfortable clothing so you can concentrate on the lab.
Explanation:
Wearing loose clothing can make it cling onto certain things, which could create a spill or a different hazard. B, C, and D are all things you SHOULD be doing to achieve safe lab behavior.
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Please help
Logan has been studying rocks at school. How could he learn more about the different types of rocks that come from volcanoes?
A.
collect rocks at the shore
B.
read comics about imaginary rocks
C.
explain to his sister how volcanoes form
D.
watch videos about volcanic rocks
Answer:
I think D is the answer. The others can't be answer. Specially B and D can't be the answer.
How many xenon atoms are contained in 1.00 moles of xenon?
Answer:
6.022 x 10²³
Explanation:
The number of atoms = the number of moles x with the Avogadro's number.
(The Avogadro's number is 6.022 x 10²³ atoms / moles)
number of atoms = 1.00 moles x 6.022 x 10²³ atoms / mole
number of atoms = 6.022 x 10²³ atoms
(There is no need to simplify?) = 6.022 x 10²³
(ps. This is my first time doing this question so im sorry if i got it wrong
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how do i solve these equations using proust's law? we haven't gone over balancing chem equations in class and our teacher doesn't want us to use those but instead some kind of ratio? can someone explain
Answer:
Explanation:
Ok so Proust's Law, better known as the Law of Definite Proportions, states that the components of a compound always exist in a fixed ratio. This means that it does not matter what the source of the components are nor the coefficients in front of them. The ratio your teacher is referring to is most likely mass percent/ percent composition. This ratio is the amount of the component over the amount of the entire compound times 100%.
*I am not very familiar with this law so please do with my answers what you will :)*
7.)
First, you want to find the percent composition (aka mass composition) of Na in NaCl.
45.89 g Na
--------------------- x 100% = 39.3%
116.89 g NaCl
So, there must be 39.3% sodium in NaCl. You can find how much chlorine is in NaCl by subtracting that percent by 100 (to find the percent composition of chlorine) then multiplying it by the mass.
100% - 39.3% = 60.7%
60.7% / 100 = 0.0607
116.89 g NaCl x 0.0607 = 70.91 g Cl₂
You could also just subtract the mass of sodium from the mass of sodium chloride to find the mass of chlorine.
116.89 g NaCl - 45.89 g Na = 71 g Cl₂
8.)
10.57 g Mg + 6.96 g O₂ = 17.53 g MgO
6.96 g O₂
--------------------- x 100% = 39.7% O₂
17.53 g MgO
9.)
6.46 g Pb = 1 g O₂
68.54 g Pb = 28.76 g O₂
68.54 g Pb / 28.76 g O₂ = 2.83 g ≠ 6.46 g
No, the two samples are not the same because the proportion of lead to oxygen is not the same for both samples. In the first sample, there is 6.46 g lead for every oxygen. In the second sample, there is 2.38 g lead for every oxygen.
In the reaction of 675.9 grams of barium chloride and excess silver(I) nitrate, how many grams of silver(I) chloride should get formed?
i dont understand, show work pls ty
Taking into account the reaction stoichiometry, the mass of silver(I) chloride formed is 930.37 grams.
Reaction stoichiometryIn first place, the balanced reaction is:
2 AgNO₃ + BaCl₂ → 2 AgCl + Ba(NO₃)₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
AgNO₃: 2 moles BaCl₂: 1 moleAgCl: 2 molesBa(NO₃)₂: 1 moleThe molar mass of the compounds is:
AgNO₃: 169.87 g/moleBaCl₂: 208.24 g/moleAgCl: 143.32 g/moleBa(NO₃)₂: 261.34 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
AgNO₃: 2 moles ×169.87 g/mole= 339.74 grams
BaCl₂: 1 mole ×208.24 g/mole= 208.24 grams
AgCl: 2 moles ×143.32 g/mole= 286.64 grams
Ba(NO₃)₂: 1 mole×261.34 g/mole= 261.34 grams
Mass of silver(I) chloride formedThe following rule of three can be applied: if by reaction stoichiometry 208.24 grams of barium chloride form 286.64 grams of silver(I) chloride, 675.9 grams of barium chloride form how much mass of silver(I) chloride?
[tex]mass of silver(I) chloride=\frac{675.9 grams of barium chloride x286.64 grams of silver(I) chloride }{208.24 grams of barium chloride}[/tex]
mass of silver(I) chloride= 930.37 grams
Finally, the mass of silver(I) chloride formed is 930.37 grams.
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Need answer ASAP!! The specific heat capacity of metal A is twice that of metal B. Based on
this information, which of the following statements is true?
The melting point of metal A is higher than that of metal B
The heat of fusion of metal A is twice that of metal B
If the same amount of heat is absorbed by equal masses of metal A and metal B,
the temperature change of metal A will be twice that of metal B
If the same amount of heat is absorbed by equal masses of metal A and metal B,
the temperature change of metal A will be half that of metal B
Answer:
last choice
Explanation:
Specific heat of a metal is j/kg-c
It says nothing about melting point or heat of fusion
A = twice B = 2 * j/kg-c B = j/kg-c
if j is constant and mass is the same we can write this more like
A = 2 /C and B = 1/C
or A ~ C/2 and B~ C
now you can see that the temp change in A will be 1/2 that of B
The buildup of sediment where a river empties into a slow-moving or nonmoving body of water is known as a/an
A type of soil made almost entirely of windblown sediment is called _______.
The _______ in soil comes from decaying plants and animals and their waste products.
_______, which is made up of tiny particles and drains water very poorly, is one of the main components of soil.
A type of soil called peat is most likely to form in a/an
Water helps in the development of soil by carrying _______ and nutrients from upper layers to lower layers.
The _______ of nutrients from soil is common in wet environments, like rain forests.
Quartz-rich parent material leads to the development of _______ soils.
The layers of soil composed mainly of organic matter are known as the ______ and _______ horizon.
A layer of soil in which clay, iron, and other elements from the overlying soil accumulates is known as the _______ horizon, or subsoil.
ANSWERS:
river delta.
loess
organic matter
Clay
swamp (or wetland).
minerals
leaching
sandy
O and A
B
The buildup of sediment in which a river empties right into a slow-transferring or non transferring frame of water is referred to as a Delta.
What is Delta ?Deltas are wetlands that shape as rivers empty their water and sediment into some other frame of water, together with an ocean, lake, or some other river.
A form of soil made nearly completely of windblown sediment is referred to as Loess.
The natural count number in soil comes from decaying flora and animals and their waste products.
Clay, that's made of tiny debris and drains water very poorly, is one of the essential additives of soil.
A form of soil referred to as peat is maximum probably to shape in a/an Coastal surroundings in Tropical placing.
Water enables withinside the improvement of soil with the aid of using carrying Mineral and vitamins from higher layers to decrease layers.
The Richness of nutrients from soil is not unusualplace in moist environments, like rain forests.
Quartz-wealthy determine cloth results in the improvement of Sandy soils.
The layers of soil composed specifically of natural count number are referred to as the O and A horizon.
A layer of soil wherein clay, iron, and different factors from the overlying soil accumulates is referred to as the B horizon, or subsoil.
Delta is stated to be a frame of sediments deposited whilst a river flows into a status water, together with the ocean or a lake.Loess are wind blown deposits of silts and clay composed of quartz, feldspar and different minerals . Loess dominantly have excessive porosity.Organic subjects compose specifically of stays of animal and flora . After this flora and animals dies they shape natural count number that provides to soil vitamins.Clayey soil represent very tiny debris which have a bad draining cappotential because of it tiny bad spaces .Tropical placing in a coastal surroundings affords the important environments for soils like peat to shape . It has plentiful of plant stays . Moreover peat is the primary degree of coal formation, containing wet and unconsolidated plant substances.Minerals part of what help withinside the improvement of the soil .And additionally it is carried right all the way down to the earth with the aid of using water thru a procedure referred to as Leaching.Richness of nutrient are not unusualplace in tropical surroundings which are moist and help plentiful life.Sandy soil are fashioned from dad and mom substances containing minerals together with feldspar and quartz.Horizon O and A are referred to as topsoil and are specifically compose of animal and flora stays and big quantity of minerals.The subsoil or B Horizons consists of mineral together with irons , clay minerals because of percolation from the pinnacle soils and it has a tendency to build up here(subsoil).Learn more about Horizon here ;
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How many moles of CH3CH2Br are contained in 422 mL of 0.0950 M CH3CH2Br solution?
C6H12O6 + 6O2 → 6CO2 + 6H2O + energy
Carbon dioxide + Water Glucose (sugar) + Oxygen CO2 + H2O C6H12O6 + 6O2 Cellular respiration or aerobic respiration is a series of chemical reactions which begin with the reactants of sugar in the presence of oxygen to produce carbon dioxide and water as waste products.
Which of the following hereditary conditions is characterized by abnormally shaped blood cells?
Acne
Heart disease
Sickle cell anemia
Type 1 diabetes
Answer:
Sickle cell anemia
Explanation:
is an inherited genetic abnormality of hemoglobin (the oxygen-carrying protein found in red blood cells) characterized by sickle (crescent)-shaped red blood cells and chronic anemia caused by excessive destruction of the abnormal red blood cells.
Answer:
Sickle cell
Explanation:
I just took the test and it was correct.
Step 5: Measure the Mass of the Water (Iron)
Tare the balance. Put calorimeter (no lid) on the balance.
Measure the mass to the nearest 0.01 g.
g
DONE✔
ZERO
Answer:
12.42 g
Explanation:
because I saw your laptop so it is
Different atoms and elementary particles have varied masses. Therefore, 12.42 g is the Mass of the Water.
What is mass?A body's mass is an inherent quality. Before the invention of the atom or particle physics, it was widely considered to be tied to the amount of matter inside a physical body. It was discovered that, despite having the same quantity of matter in theory, different atoms and elementary particles have varied masses.
There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent. The resistance of the body to acceleration in the presence of a net force can be measured experimentally as mass. 12.42 g is the Mass of the Water.
Therefore, 12.42 g is the Mass of the Water.
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Identify if the following substances (a-h) are elements or compounds.
Answer:
Boron, Hydrogen, Helium, Lithium, Beryllium, Carbon, Nitrogen, Oxygen, etc.
Explanation:
These are all elements, not all of them.
