Answer:
regulate temperature and remove waste
HELP HURRY WILL GIVE BRAINLIEST
How many mols are present in 3.07 grams of carbon?
Answer:
It's 0.2556054185018347 moles
for the sn2 reaction, draw the major organic product and select the correct (r) or (s) designation around the stereocenter carbon in the organic substrate and organic product. include wedge‑and‑dash bonds and draw hydrogen on a stereocenter.
The correct (R) or (S) designations for stereocenter carbons are as follows: (S) is the organic substrate, and (P) is the organic product (R).
The substrate is designated as S the reaction's result as R. As a result. The SN2 reaction's mechanism can be summed up as follows: This nucleophilic substitution process only requires one step.
Due to the involvement of two reactants in the step that determines the rate, the reaction is referred to as the SN2 reaction.
The electrophile is attacked by the nucleophile in the reaction's mechanism, causing a transition phase in which the electrophile's alkyl group leaves and the nucleophile forms a new bond with the substrate that is still present.
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A chargers particle is know as a
An ion is an atom or collection of atoms where the number of electrons and the number of protons are different. A positive ion, also known as a cation, is a particle that exists when the number of electrons exceeds the number of protons.
What does an atom's ion mean?Because they have an equal number of protons and electrons, atoms are neutral particles. Ions are electrically charged particles that can be created by either taking electrons away from neutral atoms to form positive ions or adding electrons to neutral atoms to produce negative ions.
What makes something an ion?Depending on whether the number of electrons in an atom is greater or less than the number of protons in the atom, an atom can develop a positive charge or a negative charge. An atom is referred to as an ION when it is drawn to another atom due to an imbalance in its electron and proton numbers.
An ion is it an element?Any element that has a variable ratio of protons to electrons, producing either a positively or negatively charged atom, is said to contain an ion. It is relatively easy to determine whether an element is an ion.
How come ions originate in elements?To become a noble gas configuration, elements create ions in order to become more stable. They lose or gain electrons to create ions, which results in a fully filled outer shell configuration and subsequently stability.
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Our students are deficient in Iron ,formulate a
mineral tablet for your age group containing Iron and
how to test its purity
Ferrous fumarate: medicine to treat iron deficiency anaemia - NHS.
What causes iron-deficiency anemia?Anemia is a disorder in which the blood does not contain enough healthy red blood cells. Iron deficiency anemia is a prevalent type of anemia. The body's tissues receive oxygen through red blood cells. Iron deficiency anemia, as the name suggests, is brought on by a lack of iron.Your chance of developing issues that affect the heart or lungs, such as an unusually quick heartbeat (tachycardia). Heart failure, where your heart is unable to pump enough blood around your body at the proper pressure, may increase if you have severe iron deficiency anemia.To learn more about : Anemia
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A student is trying to determine which type of poison will most effectively eliminate the ant problem in their home. they purchase two types of ant bait. one brand they place on the kitchen counter. the second brand they place just outside their front door. is this a controlled experiment? why or why not? include the term "variable" in your answer.
No, it cannot be held under the controlled experiment example. This is because the dependent variable is where we test the poison and the independent variable is the choice of valid poison.
Also, according to the definition of a controlled experiment all experiments are controlled experiments when factors other than the independent variables are held constant. But as you can see here the dependent variable is different.
Also, in this experiment, one drug was placed on the kitchen counter and another was placed on the doorstep. Kitchen counters can attract more odors from food/sweets than front doors so it's clear that both toxins aren't given an equal chance. And this may result in more ants getting trapped and dying from the poison on your kitchen counter, and fewer ants on your front door regardless of effectiveness.
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how many moles and how many ions of each type are present in each of the following? (a) 88 ml of 1.75 m magnesium chloride (b) 321 ml of a solution containing 0.22 g aluminum sulfate/l (c) 1.65 l of a solution containing 8.83×1021 formula units of cesium nitrate per liter
a. The number of moles = 0.154 moles and number of ions =2.78x10²³ ions.
b. The number of moles= 2.18x10⁻⁴ moles and number of ions = 6.56x10²⁰ ions.
c. The number of moles= 0.0147 moles and number of ions = 1.77x10²² ions .
Calculation of the no of moles and no of ions:
A. Moles MgCl₂:
According to question
88mL = 0.088L * (1.75mol / L) = 0.154 moles MgCl₂
By using (Avogadro's number:)
So,
0.154mol *(6.022x10²³ molecules / 1 mol) = 9.27x10²² molecules.
Since 1 molecule of MgCl₂ contains 3 ions:
So,
Ions = 2.78x10²³
B. Moles Al₂(SO₄)₃:
( Aluminum sulfate , molar mass = 324.15g/mol:)
So,
0.321L * (0.22g Al₂(SO₄)₃ / L) * (1mol / 324.15g) = 2.18x10⁻⁴ moles.
Now,
1 molecule contains 5 ions:
So,
2.18x10⁻⁴ moles *(6.022x10²³ molecules / 1 mol) * 5 = 6.56x10²⁰ ions.
C. Since
8.83x10²¹ formula units of CsNO₃ = Number of molecules. Ions are:
So,
8.83x10²¹ * 2 = 1.77x10²² ions
And moles are:
8.83x10²¹ Formula units * (1mol / 6.022x10²³) = 0.0147 moles
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What do these two changes have in common?
shaking up salad dressing
adding dish soap to water in a sink
Select all that apply.
Both are only physical changes.
Both are caused by heating.
Both are chemical changes.
Both are caused by cooling.
According to the given statement these two changes have in common in Both are only chemical changes.
The correct option is C.
What changes do chemicals make?Chemical changes happen when bonds among atoms or molecules are formed, broken, or both. This suggests that a substance is transformed from one with a particular set of characteristics (such melting point, color, flavor, etc.) into one with a different set of characteristics.
What function does chemical change ?The majority of our energy is produced by chemical reactions. Many different types of materials are tested, identified, and analyzed using chemical reactions (such as pool testing kits and forensic tests from TV shows like "CSI").
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HELP ASAP PLS
The image below shows charged particles bouncing around.
A square is shown with the title State of Matter. Few circles with positive and negative sign are shown inside the square. Long arrows pointing outwards from the edge of each circle are shown
Which state of matter is most likely represented in the image? (4 points)
a
Gas
b
Solid
c
Liquid
d
Plasma
pls give me the correct answer!
Answer:
Your answer is C. Gas
Explanation:
Particles in a solid stay still and are compacted
Particles in a liquid move around more than they do when they are frozen
Particles in a gas bounce around more freely than both liquids and solids because they are being forced to be compacted in one area or shape
Hope this helps! Good Luck! 0w0
Answer: C, gas
the only one that would make sense
What is the dipole moment of an HBr molecule, whose bond length is 0.141 nm?
4.81 D
5.98 D
6.77 D
3.67 D
6.11 D
The dipole moment of the hydrogen bromide HBr molecule is equal to 6.77 D. Therefore, option (C) is correct.
What is a dipole moment?A dipole moment can be determined from the product of the magnitude of the charge and the distance between charges and is represented by the Greek letter ‘µ’.
The bond dipole moment arises between two atoms of different electronegativities in a chemical bond.
μ = q × d
Where: μ is the bond dipole moment, q is the magnitude of the partial charges, and d is the distance between them.
Given, the bond Length of HBr = 1.41 A° = 1.41 × 10⁻¹⁰ m.
The charge on H and Br atoms = 1.6 × 10 ⁻⁹ C
Therefore,
Dipole Moment of HBr = Distance × Charge
Dipole Moment = 1.41 × 10⁻¹⁰ × 1.6 × 10 ⁻¹⁹
Dipole Moment = 2.25882 × 10⁻²⁹ C.m
The conversion factor of one-coulomb meter is equal to 2.9989 ×10⁻²⁹ Debye
Therefore,
Dipole Moment = 2.25882 ×10⁻²⁹ × 2.9989 ×10²⁹
Dipole Moment of the HBr = 6.77 Debye.
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The image below shows charged particles bouncing around.
Plasma state of matter is mostly represented in the image
A state of matter is a way to describe the behavior of atoms and molecules in a substance and there are three common states of matter which is solids means relatively rigid, definite volume and shape and they vibrate in place but don't move around and plasma is the the when at the very temperature of stars atom loses their electron and the mixture of electron and nuclei that result` in plasma state of matter
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A compound of bromine and fluorine is used to make uf6, which is an important chemical in processing and reprocessing of nuclear fuel. The compound contains 58. 37 mass percent bromine. Determine its empirical formula.
Empirical formula of the compound of bromine and fluorine is used to make UF₆ is Brf₃.
The compound contains 58.37% of Bromine.
For simplicity, let us assume that the mass of the compound made up of bromine and Fluorine is 100g.
Now the contents of Bromine and fluorine in the compound are 58.37g and 41.63g.
To find the empirical formula of the compound. we have to follow the certain set of rules.
Step1. Calculating the number of moles of each and every element present in the compound.
Mole = Given mass/molar mass
mole of Br = 58.37/79.9
moles of Br = 0.73 moles.
and
moles of F = 41.63/19
mole of F = 2.19 moles.
Step2. Calculating the molar ratios of each and every compound.
molar ratio is calculated by dividing the moles of all element with moles of element with least moles
Molar ratio of Br = 0.73/0.73 = 1
Molar ratio of F = 2.19/0.73 = 3
Step3. Making the molar Ratio itself the number of atom of that element in the compound.
Here, 1 atom of Br and 3 atoms of F.
So, the empirical formula is BrF₃.
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Compounds consist of?
a) only carbon and water.
b)substances that can be separated by a centrifugation
c)different chemically combined element
two or more elements physically combined d) two or more elements plivaically combined.
when 15.0 g
of steam drops in temperture from 275.0°C
to 250° C, how much heat. energy is released?
Answer: The amount of heat needed to raise a substance's temperature by one Kelvin per kilogram. The heat needed to raise the temperature of a given substance with known mass can be calculated as follows:
ΔH=mCΔT
ΔH=Amount of heat energy supplied
m=Mass of the substance = 15 g
ΔT=Change in temperature = Tfinal−Tinitial = 250° C - 275.0°C = -25°C
C=Specific heat capacity = 2.02 J/g °C
ΔH=mCΔT
after putting the given values,
ΔH= -757.5 J
The formula also shows that heat energy is released (negative value) when the change in temperature is negative, i.e., when the temperature of a substance falls.
Which information is needed to construct a geomagnetic time scale
Select two correct answers
A the average speed of tectonic plates on earth
B the length of the mid-oceanic ridge
C the age of rocks along the surface earth
D the magnetic direction of rocks along the surface of earth
The information needed to construct a geomagnetic time scale is the age of rocks along the surface earth and the magnetic direction of rocks along the surface of earth. Thus option C and D is correct.
What is geomagnetic time scale?Geomagnetic time scale is defined as a chronicle of the commencement and duration of the numerous events of magnetic polarity reversal on Earth.
Geologists can give absolute ages to the records of these paleomagnetic anomalies, which are the reversals, to build a geomagnetic time scale. The rock is radiometrically dated, and each stage of reversal is assigned an absolute geologic age.
Thus, the information needed to construct a geomagnetic time scale is the age of rocks along the surface earth and the magnetic direction of rocks along the surface of earth. Thus option C and D is correct.
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Answer:
-the age of rocks along the surface earth
- the magnetic direction of rocks along the surface of earth
Explanation:
let me know if that works!
Background: PTC testing is a method used to predict a genetic trait for bitter tasting ability.
People who are dominant taste PTC (phenylthiocarbamide) [P], and people who are recessive
do not taste PTC [p]. This trait is passed genetically from parents to their children, so that if a
person has the trait, then at least one of their parents has the trait as well. (Use the letter P to
represent the alleles)
Write the genotype for people who do not taste PTC:
• Are they homozygous or heterozygous?
Write the possible genotypes for people who do taste PTC:_
Are they homozygous or heterozygous?
Purpose: In this activity, you will taste two pieces of paper to see if you are dominant
or recessive for the genetic trait. You will use this information to predict the possible genotypes
and phenotypes for your parents.
Biology Content Standard:
2e. Students know why approximately half of an individual's DNA sequence comes from
each parent.
Hypothesis:
Do you think you will be a Taster or a Non-Taster?
Pre-lab Questions:
1. What is a genotype?
2. What is a phenotype?
3. What is a dominant trait?
4. What is a recessive trait?
Page
Following are the answers related to traits of genes.
How do genotypes work?
Gene pool as a whole is characterized by the term "genotype," which roughly refers to an organism's genetic make-up. The term can also be used in a more precise sense to refer to the several alleles, or variations of a gene, that an organism possesses.
Describe the phenotype.A person can be recognized by their phenotypes, which include things like height, eye color, and blood type. A person's phenotype is influenced by both their genotype (genotype) and environment.
A dominating attribute is what?refers to a trait that develops more frequently than another trait due to interactions between gene alleles.
A recessive characteristic is what?a trait that is only present in homozygous genotypes; a trait that is frequently concealed by other inherited characteristics but persists in a population of heterozygous genotypes.
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what is the standard enthalpy of combustion of ethane? (b) what is the specifi c enthalpy of combustion of ethane? (c) is ethane a more or less effi cient fuel than methane?
Ethane gas, C2H6(g), has a combustion enthalpy of roughly -1.5*103 kJ/mol.
Compared to pure methane, gaseous blends with ethane as a component have higher thermal efficiency and shorter combustion times.
Calculate the amount of fuel that has been burned in moles?This can be accomplished by calculating the difference between the mass of the fuel before and after the water has heated. Calculate how much energy is released by one mole of the material. By dividing by 1000, you may obtain the answer in KJ. This gives you the J/mol-1.
What factors affect combustion enthalpy?The amount of H in a reaction is determined by the physical states of the reactants and products (gas, liquid,).
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HELP ASAP
Two isotopes of the FAKE element Sz have the following abundances;
Seabreezium-71 75%
Seabreezium - 76 25%
What is the average atomic mass?
(Limit your answer to the TENTHS place.)
Two isotopes of the FAKE element Sz, Average mass of Seabreezium is equal to 199.77625 amu.
Given that Two isotopes of of Sz is given as :
Seabreezium-71 75%
Seabreezium - 76 25%
Now,
Isotopes of Seabreezium is given as:
Seabreezium-271Seabreezium - 269Now,
1st isotope = 71 75% of 271
= 194.44amu
2nd isotope = 76 25% of 269
= 205.11 amu
Now,
Average Mass of Seabreezium = 205.11 + 194.44/2
Average Mass of Seabreezium = 199.77625 amu
Thus, from the above conclusion we can say that, Average mass of Seabreezium is equal to 199.77625 amu.
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What is the energy of light whose wavelength is 4.06 x 10¹¹ m?
[tex]\quad \huge \quad \quad \boxed{ \tt \:Answer }[/tex]
[tex]\qquad \tt \rightarrow \:{4.88 × 10}{-15} \:\: joules [/tex]
____________________________________
[tex] \large \tt Solution \: : [/tex]
By using Plank's equation ;
[tex]\qquad \tt \rightarrow \: E = \dfrac{hc}{ \lambda} [/tex]
[tex]\qquad \tt \rightarrow \: E = \dfrac{6.6 \times 10 {}^{ - 34} \sdot3 \times 10 {}^{8} }{ 4.06 \times 10 {}^{ - 11} } [/tex]
[tex]\qquad \tt \rightarrow \: E = \dfrac{19.8}{4.06} \times (10 {}^{ - 26} \times 10 {}^{ 11 } )[/tex]
[tex]\qquad \tt \rightarrow \: E = 4.88 \times 10 {}^{ - 15} \: \: \: joules[/tex]
Answered by : ❝ AǫᴜᴀWɪᴢ ❞
Carbon disulfide gas and oxygen gas react to form sulfur dioxide gas and carbon dioxide gas. What volume of carbon dioxide would be produced by this reactionif 1.1 L of carbon disulfide were consumed?Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits.08 0 0.20.0X
Answer: Based on the stoichiometry 1 mole of carbon disulfide will produce 1 mole of carbon dioxide. Similarly we can apply the volume ratio, so 1.1L of carbon disulfide will produce 1.1L of carbon dioxide.
Find the balance net ionic equation CaCO³(s) + HNO³(aq) →
Answer:
Not sure why the 3s are on the top, unless they are charges.
But the answer is: 2HNO3 + CaCO3 → Ca(NO3)2 + H2O + CO2
Explanation:
HEEEEELLPPP MEEEE PLSSSSSSSSSSSSSSSSSSSS
b. What is the atomic mass of the element in period 5, group 14?
Answer:
118.71 u
Explanation:
Tin. Tin is a chemical element with the symbol Sn (for Latin: stannum) and atomic number 50. It is a main-group metal in group 14 of the periodic table.
Source: https://en.m.wikipedia.org/wiki/Period_5_element#:~:text=Tin,-Main%20article%3A%20Tin&text=Tin%20is%20a%20chemical%20element,14%20of%20the%20periodic%20table.
PLS HELP WILL MARK BRAINLIEST!!
STSE Topic: Nanoparticles In medicine. In-depth details and examples. Connections to human health. environmental and societal negative impacts and how we can solve this problem. Provide solutions. Future science: What will the future of this Nanoparticles in medicine will be? Unit connection: Nanoparticles in medicine connections to atomic theory unit.
According to the theory, cancer drugs delivered by nanoparticles could function as biological missiles that attack tumors with the least possible harm to healthy organs.
In medicine, what do nanoparticles mean?Nanomaterials are made up of organic or semiconducting particles, non-metal atoms, and metal atoms. "Nanomedicine" refers to the capacity of nanotechnology to influence medicine. Doctors will be able to diagnose and treat patients suffering from a variety of illnesses using nanomedicine.
What role will nanotechnology play in medicine in the future?There is growing hope that the use of nanotechnology in dentistry and medicine will result in significant improvements in disease detection, therapy, and prevention. A brand-new discipline called nanomedicine is emerging as a result of escalating interest in the potential medical uses of nanotechnology.
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How will you show that carbon dioxide is havier than air?
Answer:
There's an experiment that you can try to see if carbon dixide is heavier than air.
Explanation:
At room temperature, carbon dioxide has higher density (ρ = 1.98 kg·m -3) than air (ρ = 1.29 kg·m -3). The density of gas, however, significantly depends on its temperature. Carbon dioxide produced by burning has higher temperature than the surrounding air.
Why is CO2 heavier than the air?
Short answer is CO2 is heavier than ambient air, but it does not drift to the ground as there is a lot of mixing going on in ambient air. ... Carbon dioxide, also known by the chemical formula CO2, has a higher density than the other gases found in air, which makes CO2 heavier than the air.
at standard pressure, water has unusual properties that are due to both its molecular structure and intermolecular forces. for example, although most liquids contract when they freeze, water expands, making ice less dense than liquid water. water has a much higher boiling point than most other molecular compounds having a similar gram-formula mass. determine the total amount of heat, in joules, required to completely vaporize a 50.0-gram sample of h2o( ) at its boiling point at standard pressure.
The heat required to vaporize this sample at standard pressure is 113,270 J.
We can calculate the amount of heat (Q) needed to vaporize 50.0 grams of water by using water's heat of vaporization (q) at 100 °C (boiling point of water) - 40.8 kJ/mol, and the number of moles of water (n).
Q = n * q
The heat of vaporization describes the amount of energy needed to be introduced to a single mol of water at 100 °C to break the intermolecular interactions between molecules of water so it changes to a gaseous state.
To calculate the number of moles of water, we are going to use the mass of water (m = 50.0 g) and its molar mass (M = 18.01 g/mol):
n = m/M
n = 50.0 g / 18.01 g/mol
n = 2.7762 mol
Now we can calculate the amount of heat needed:
Q = 2.7762 mol * 40.9 kJ/mol
Q = 113.27 kJ
Q = 113,270 J
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You have an elodea sprig in a test tube containing bromothymol blue. Then you watch it for several days. At what time of day will the oxygen level in the tube be the lowest?.
Answer:
Prior to sunrise
consider a closed vessel initially containing 1 mol of pure ethyl acetate at 74°c and 100 kpa. imagine that pure ethanol is slowly added at constant temperature and pres¬sure until the vessel contains 1 mol ethyl acetate and 9 mol ethanol. describe the evo¬lution of phases and phase compositions during this process. comment on the practical feasibility of carrying out such a process. what sort of device would be required? how would the total system volume change during this process? at what composition would the system volume reach its maximum value?
By ideal gas approximation, the volume change is 230.2 liters.
We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation
P . V = n . R . T
where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.
From the question above, we know that
n₁ = 1 mol
n₂ = 1 + 9 mol = 10 mol
P₁ = P₂ = 100 kPa = 100000 Pa
T₁ = 74⁰ C = 347 K
Find the initial volume
P₁ . V₁ = n₁ . R . T₁
100000 . V₁ = 1 . 8.31 . 347
V₁ = 0.0288 m³
When the initial and final temperature and pressure are the same, we can use the ratio of the number of moles and volume as
V₁ / n₁ = V₂ / n₂
0.0288 / 1 = V₂ / 9
V₂ = 0.25952 m³
V₂ = 259.52 liters
The volume change is
ΔV = V₂ - V₁
ΔV = 259.52 - 28.8
ΔV = 230.2 liters
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What do the substances that do not conduct electricity once they are dissolved have in common?(not including water)
Answer: The substances that are insoluble in water and do not conduct electricity are made up of nonmetal atoms.
Explanation:
Draw the structure of an alkene of five carbons that would give the same product as a result of either oxymercuration‑reduction or hydroboration‑oxidation.
Here hydroboration-oxidation, as well as oxymercuration-reduction, gives the same compound 1-cyclo pentanol.
A compound in linguistics is a lexeme (more precisely, a word or sign) composed of more than one stem. The process of word construction that results in compound lexemes is known as compounding, composition, or nominal composition. An open compound or a spaced compound is one that uses a space rather than a hyphen or concatenation; the alternative is a closed compound.
The compound's meaning may be comparable to or distinct from the meanings of its constituents in isolation. With very few exceptions, the first component stem in English compound words is emphasized.
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