Answer:
All of the above are correct.
Explanation:
The Flame Test Shortcomings
Small quantities of most molecules can not be measured by the examination.
The signal's intensity ranges from one test to the next.
The test findings are impaired by impurities or toxins.
The test is not capable of differentiating between all components.
Why does a water molecule have a bent shape?
Answer:
The oxygen atom has lone pairs of electrons.
Explanation:
what is the formula for calcium bisulfate
Answer:
the formula
Explanation:
I’m confused on this
Answer:
B
Explanation:
The scientist had a wrong hypothesis?
Answer:
it would be C.
Explanation:
becuase the scientist would know what to to next time for his next experiment. even if it went wrong, he can try to get it right again.
butter melting on warm pancakes is
conduction
convection
radiation
butter melting on warm pancakes is convection
The following information should be considered:
Since convection is the movement arise within a fluid by the tendency of hotter and therefore less dense material to rise,.Moroever, it is colder, denser material to sink under the impact of gravity, that leads in transfer of heat.learn more: https://brainly.com/question/2514933?referrer=searchResults
A student loaded a mixture of compounds onto a silica gel column using 5 mL of dichloromethane as the loading solvent. After running the column using petroleum ether as the eluant and collecting 8 fractions, the student analyzed the contents by TLC to find that all of the compounds in the mixture came off in the first two fractions. In addition, no separation was observed. Choose the statement that BEST describes the error. The sample should be loaded using a maximum 1 mL of CH2Cl2. Petroleum ether was the incorrect eluant. A more polar solvent should have been used. The student should re-run the TLC. It was obviously performed incorrectly. The student packed the column incorrectly.
Answer:
Petroleum ether was the incorrect eluant.
Explanation:
In column chromatography, there must be a mobile phase (eluant) and a stationary phase(adsorbent column). The mobile phase in this case is petroleum ether while the stationary phase is silica gel.
If no separation is observed, then it simply means that the wrong choice of mobile phase(eluant) was made. If a better choice of eluant is made, it can effectively achieve the separation of the mixture. The components of the mixture have a great affinity towards the petroleum ether hence they moved rapidly through the column and separation was not achieved.
a sample can not be broken down physically or chemically what is it
Answer:
Pure Substance. A sample of matter, either a single element or a single compound, that has definite chemical and physical properties. Element. A pure substance that cannot be broken down into other substances by chemical or physical means.
Explanation:
Sorry if it's wrong!!!!!!!
Answer:
Elements
Explanation:
Elements cannot be broken down into anything simpler physically or chemically. Compounds: are pure substances that are made up of more than l type of atom and can be broken down or decomposed into its individual elements by chemical methods, but cannot be separated by physical methods.
What is the volume of a substance that has a mass of 20 g and a density
of 4.0 g/ml?
Answer:
The answer is 5 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
So we have
[tex]volume = \frac{20}{4} \\ [/tex]
We have the final answer as
5 mLHope this helps you
what do borates do structurally that none of the other non silicates with anionic complexes do g
Answer:
Kindly check the explanation section.
Explanation:
The chemical compound known as Borates has the Molecular Formula: BO3^-3. It has the shape of a triangle but Borates can form multiples ones that is to say quadrangles. Also, as a result of the fact that the octect is not complete, Borates are used as lewis Acid.
The oxygen present in Borates is/are directly attached to the central atom that is Boron while in non silicates the oxygen(s) that may be present is not directly attached to the central atom.
Question 1 (5 points)
Calculate the frequency of a photon that exhibits a wavelength of 451 nm.
Equation: E = hu
h = 6.63 x 10-34]'s
Answer:
e
Explanation:
Calculate the energy of a wave given a frequency of
9.43 x 1011 Hz.
Answer:
The answer is
[tex]4.92 \times {10}^{ - 22} \: J[/tex]
Explanation:
In order to find the energy of the wave we use the formula
e = hfwhere
e is the energy
f is the frequency
h is the Planck's constant which is
6.626 × 10-³⁴ Js
From the question
f = 9.43 × 10¹¹ Hz
We have
[tex]e = 9.43 \times {10}^{11} \times 6.626 \times {10}^{ - 34} \\ [/tex]
We have the final answer as
[tex]4.92 \times {10}^{ - 22} \:J[/tex]
Hope this helps you
2. What is an example of an object that affects gravity on Earth?
Answer:
The moon
Explanation:
The moon pulls on the earth, causing the tides to raise as the water is being pulled by the moon.
Material
Appearance of the material,
including its color and state
baking soda
baking powder
Salt
sugar
flour
vinegar
cooking oil
The appearance and physical states of the material given is described below please look at it.
Appearance of the materials:Baking soda: It is a white solid.
Salt: it is white in color having a solid physical state.
Sugar: It is white in color having crystals or solid in physical state.
Flour: It is creamish white in color having solid particles.
Vinegar: It is transparent in color.
Cooking oil: It is a yellowish emulsion.
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If air has a density of 1.225 kg/m3, what is the mass of the air in a hot air balloon that has a volume of 2,800
m3?
Answer:
The answer is 3430 kgExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume = 2800 m³
density = 1.225 kg/m³
We have
mass = 2800 × 1.225
We have the final answer as
3430 kgHope this helps you
Which health issue is associated with exposure to indoor air pollution?
O stroke
O hair loss
diabetes
O skin cancer
Answer:
stroke
Explanation:
What is cheese made of is it like a piece of moon ?!
Answer:
It's made from dairy.
Explanation:
How many moles of Hions are present in the following aqueous solution?
3.3 mL of a 0.65 M nitric acid:
Answer:
Nitric acid is a strong acid meaning it completely dissociates in water. Therefore, you can say that the concentration of H+ ions in solution is the same as the concentration of the acid (molar concentration). So once you have that, you can use the pH formula to find the pH of the acid.
pH = -log[H+]
So if you have .15 M HNO3 the pH is 0.82.
But, if you have a different concentration, the pH will change.
Explanation:
To make a ball move faster, you need to increase
The force applied to the ball
The size of the ball
O The mass of the ball
The friction under the ball
Answer:
The force applied to the ball.
Explanation:
Hope this helps!! Good luck!!
the elements least likely to form bonds are found in witch group?1
A. 15
B. 16
C. 17
D. 18
Answer:
D. 18
Explanation:
group 18 elements are called noble gases.
They have complete octet in their valance shell. Therefore, they are least likely to form bonds with other elements.
Which lists three parts of sunlight that make up some of the visible spectrum?
O green, blue, indigo
O infrared, red, orange
ultraviolet infrared, electromagnetic
violet, ultraviolet A ultraviolet B
Brainly if correct Hurry
Answer:
Its A
Explanation:
Green, blue, indigo lists three parts of sunlight that make up some of the visible spectrum. Hence option with green, blue, indigo is correct.
What is Electromagnetic Spectrum ?Electromagnetic spectrum is nothing but the range of wavelengths or frequencies on which electromagnetic radiation extend. it is whole distribution of electromagnetic waves according to frequency or wavelength. Electromagnetic wave is nothing but a photon which carries energy. Photon has frequency, wavelength as well as amplitude.
Electromagnetic spectrum is show in figure.
Range from 4000 angstrom to 7000 angstrom from violet to red respectively shows the visible light
Infrared light is nothing but the heat we feel from the sun. and ultraviolet light is blacked by ozone layer. we can calculate exact value of temperature of the sun rom Stephan's forth power law.
Green, blue, indigo, red and oranges are the colors from visible light, therefore they are part of visible light.
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How many grams are 4.78x10*21 atoms of aluminum?
What is the wavelength of an electromagnetic wave that travels at 3.0 x 10^8m/s and has a frequency of 5.43 x 10^-12Hz?
Answer:
frequency f = velocity of light (c)/wavelength
therefore, wavelength =
velocity of light /frequency
= 3 x 10^8/ 5.43 x 10^-12
= 0.552 x 10^20.
HOPE IT HELPS
using a curling iron to curl your hair is
conduction
convection
radiation
Answer:
its Radiation
Explanation:
Because it transfers heat from a object to a less hot object in this case from a hot curling iron to your hair.
Which of the following is the best description of matter?
Answer:
description of matter:
Matter is everything around you. Atoms and compounds are all made of very small parts of matter. Those atoms go on to build the things you see and touch every day. Matter is defined as anything that has mass and takes up space (it has volume).
please give me brainliest if I answered you question correctly
The oligopeptide MNQSYGRLVSRAAIAATAMASLIKIFAWWY was cleaved by reaction with trypsin. Trypsin is a serine protease that hydrolyses peptide chains at the proteins at the carboxyl sides of the amino acids lysine or arginine. The products of the digestion are then subjected to ESI TOF-MS in positive ion mode with the peptides in a pH 2 solution. a. Calculate the mass of each cleavage product based on their amino acid sequence and determine their predominant charge state at pH 2. Which product will reach the detector first
Answer:
Follows are the solution to this question:
Explanation:
The creation of four fragments,
(n endpoint) MNQSYGR (c endpoint)
Weight of the molecular = 854.92
Load = 2
[tex]\to \frac{mass}{Load}[/tex] = 427.46
(n endpoint)RLVSR (c endpoint)
Weight of the molecular = 629.76
Load = 3
[tex]\to \frac{mass}{Load}[/tex]= 209.92
(n endpoint) AATAMASLIK (c endpoint)
Weight of the molecular = 976.20
Load at pH(2). = 2
[tex]\to \frac{mass}{Load}[/tex]= 442.50
(n endpoint) IFAWWY (c endpoint)
Weight of the molecular = 885.03
Load= 1
[tex]\to \frac{mass}{Load}[/tex]= 885.03
It is apparent that RLVSR is the smallest mass ration for this peptide that is detected in the first place.
All living things are made of organic compounds which contain the element
A)
carbon.
B)
hydrogen.
C)
oxygen.
D)
phosphorus.
What is the air temperature 8,850 m in the air?
Question 3 (12 points)
The core becomes a
a hot, dense, slowly cooling sphere of carbon.
Оа
red dwarf
Answer:
c
Explanation:
3. Describe the trends in atomic size, ionization energy, and electronegativity from left to right across a period in
the periodic table.
Answer:
Atomic size increase with increasing atomic number within a group.
Atomic size decrease with increasing atomic number across a period.
The statement, that describe the trends in atomic size, ionization energy, and electronegativity is "that atomic size decreases, ionization energy and electronegativity increases."
What is atomic size?Atomic size seems to be the space between an atom's nucleus and its outermost shell.
What is ionization energy?The energy necessary to remove the highest-energy electron from a neutral atom is known as ionization energy (IE).
What is electronegativity?Electronegativity is a chemical property that describes an atom's or functional group's inclination to draw electrons toward itself. Across a period of elements, atomic size falls steadily from left to right. This is because all electrons within a period or family of elements are added to the same shell. Ionization energy generally increases across a period and declines down a group.
Electronegativity normally increases as you move from left to right across a period and decreases as you move down a group on the periodic table.
Hence the correct answer is atomic size decreases, ionization energy and electronegativity increases.
Learn more about atomic size , ionization energy and electronegativity
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PLEASE HELP!!! Do you think the number of animals that eats plants is related to the number of plants?
Answer:
Yes
Explanation:
As the number of animals that eat plants increase, the number of plants decrease. This is because the animals are eating a larger and larger number of plants and reducing the population.
When the number of plants gets too low, the animals will not be able to survive, and they will start to decrease in numbers. In turn, the plants will increase again. Eventually, they will reach an equilibrium.
Two compounds of phosphorus and flurorine have the following mass ratios
Compound 1: 10.14 g fluorine for every 3.38 g phosphorus
Compound 2: 8.42 g flurorine for every 4.21 g phosphorus
Find the whole number ratio of masses of flurorine in compound 1 to compound 2
Answer:
25.6 Explanation: