Answer:
B. It undergoes phase change.
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.
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Which characteristic describes bases?
taste sour
feel slippery
react with metals
are used to remove rust
Answer:
feel slippery
Explanation:
Bases are certain metallic oxides, metallic hydroxides and aqueous ammonia. They typically have the following characteristics;
The aqueous solution of many of them have a bitter taste. The aqueous solutions of bases have soapy or slippery feel and the strong bases are very caustic to the skin. Their aqueous solutions have a pH greater than 7. Bases have the ability to change the color of indicators. They are conduct electricity and are said to be electrolytes.From the choices given, the fitting answer is that bases have a slippery feel.
Answer:
B) Feel slippery
Explanation:
Just did the assignment
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:
Draw the structural formula for CH2CONHCH3 and what its functional group
Answer:
The structural formula of CH2CONHCH3 is attached below -:
and the functional group of CH2CONHCH3 is - Amide
Explanation:
The IUPAC name of CH2CONHCH3 is -: N-methyl ethenamide .
ABOUT AMIDE FUNCTIONAL GROUP -: In organic chemistry, an amide, also known as an organic amide or a carboxamide, is a compound with the general formula RC(= O) NR 'R' where R, R 'and R' represent hydrogen organic groups or atoms. When it is part of the main protein chain, the amide group is referred to as a peptide bond and isopeptide bond when it appears in a side chain, such as asparagine and glutamine in the amino acids.
The structural formula shows the arrangement of atoms and groups in a compound.
A chemical compound is composed of atoms of elements. There are three structures that could be written for a chemical substance. These are;
Empirical formulaMolecular formulaStructural formulaThe structural formula of a compound shows the arrangement of atoms and groups in the compound in space. The structural formula of the compound CH2CONHCH3 has been shown in the image attached. The following functional groups are present in the compound;
AlkyneKetoneAmineLearn more: https://brainly.com/question/946875
Classify the sugars as either aldoses or ketoses. A Fischer projection with a six carbon backbone. Carbon one is an aldehyde and carbon six is part of the group C H 2 O H. Carbons two and three have an hydroxide group on the left, and carbons four and five have an hydroxide group on the right. A Fischer projection of a six carbon backbone. Carbons one and six are part of a C H 2 O H group. Carbon two is attached to a ketone, carbons three and four have a hydroxide group on the left, and carbon five has a hydroxide group on the right. A Fischer projection with a five carbon backbone. Carbon one is an aldehyde, carbon five is part of the group C H 2 O H, and carbons two through four have an hydroxide group on the right. A Fischer projection with a three carbon backbone. Carbon one is an aldehyde, carbon three contains the group C H 2 O H, and carbon two has a hydroxide group on the right. A Fischer projection with a five carbon backbone. Carbons one and five are part of a C H 2 O H group. Carbon two is attached to a ketone and carbons three and four have a hydroxide group on the right. A Fischer projection of a four carbon backbone. Carbons one and four are part of a C H 2 O H group. Carbon two is attached to a ketone and carbon three has a hydroxide group on the right. Answer Bank
Answer AND Explanation: Carbohydrates or sugars have three classes:
Monossaccharides: made from a single polyhydroxy aldehyde or ketone unit;Oligosaccharides: formed by short chains of monossacharides united by glycosidic linkage;Polysaccharides: consist of a long chain of monossaccharides;Monossaccharides are formed by a chain of unbranched carbon, all bonded by single bonds, except for a carbon that is double-bonded by an oxygen. This bond form a carbonyl group.
If the carbonyl is at an end of the chain, the carbon is aldehyde and the molecule is called aldose. If the group is in any other position, it is a ketone and is called ketose
So analysing each projection:
1) Carbon one is a aldehyde, which means is a carbonyl and there are no other carbons forming that bond, so it's a ALDOSE
2) Carbon two is attached to a ketone and other carbons aren't, so it's a KETOSE.
3) Carbon one is aldehyde, so it's ALDOSE
4) Carbon one is aldehyde, so ALDOSE
5) Carbon two is attached to ketone, so KETOSE
6) Carbon two attached to a ketone, so KETOSE
How many km are in a foot
Answer:
0.000305 km
Explanation:
1 foot = 0.000305 kilometers
Answer:
[\tex]\huge\bold\red{brainiest answer}[/tex]1 km =3,280.8398950131foot
All living things must maintain stable body conditions (homeostasis).
A. True
B. False
3. Where are gastropods found? Choose all the correct answers.
A) on land
OB) in salt water
OC) in fresh water
OD) all of the above
O E Maastropods are extinct
Save
Answer:
OD
Explanation:
they live in every habitat on Earth. Marine habitats, ocean basins, freshwater habitats, and inland equatic habitats including salt lakes.
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
I’m not good at chemistry
Answer:
λ = 5.56 × 10⁻³ m
Explanation:
You have to use the formula c = λv to solve the problem. Review what you are given. You are given v and c, where v = 5.40 × 10¹⁰ Hz and c = 3.00 × 10⁸ m/s. The value c is for the speed of light and is something you need to memorize. You will use it often in physics and sometimes in chemistry.
Now that you figured out what you know, you can see that there is only one unknown, allowing you to solve.
c = λv
λ = c/v
λ = (3.00 × 10⁸ m/s)/(5.40 × 10¹⁰ Hz)
λ = 5.56 × 10⁻³ m
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
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.
Q1. Why is Cl2 a nonpolar molecule, but HCl is a polar molecule? Explain your reasoning.
Answer:
\/\/
Explanation:
in CI2 the electron charge is identical on both atoms but on HCI electrons are shared unequally between the chlorine atoms and hydrogen atoms
a object in a fluid will sink if the
help plz
Answer:
D.
Explanation:
Because if an object is more dense than water it will sink.
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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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.
Question 3 (12 points)
The core becomes a
a hot, dense, slowly cooling sphere of carbon.
Оа
red dwarf
Answer:
c
Explanation:
In step two of Experiment 4, you add sodium hydroxide to copper(II) nitrate and use a stirring rod to test if the solution is basic. How do you establish whether the solution is basic
Answer:
use litmus paper.
Explanation:
if red litmus paper turns blue solution is basic
blue litmus paper will remain blue if solution is basic
We can establish whether the solution in step two of experiment 4 is basic by carrying out litmus paper test. If the solution turns red litmus paper blue, then it is basic
In order to establish whether a solution is acidic, basic or neutral, litmus paper test could be carried out to know.
An acidic solution will turn blue litmus paper red
A basic solution will turn red litmus paper blue
A neutral solution does not have effect on blue or red litmus paper.
Therefore, in order to establish whether solution that resulted from adding sodium hydroxide to copper(II) nitrate in step two of Experiment 4 is basic, we could carry out a litmus paper test.
If the solution turns red litmus paper blue, then it is basic.
Hence, we could establish whether the solution in step two of experiment 4 is basic by carrying out litmus paper test. If the solution turns red litmus paper blue, then it is basic.
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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:
Matter is anything that has mass. What is the smallest unit of matter known as?
Atom
Liquid
Proton
Nucleus
Answer:
Atom
Explanation:
Its the smallest unit into which matter can be divided without the release of electrically charged particles.
The storage method used for radioactive wastes generated from fission nuclear reactors must be designed to last for how long?
months
years
centuries
weeks
Answer: c
Explanation:
Answer: C - Centuries
Explanation:
Which health issue is associated with exposure to indoor air pollution?
O stroke
O hair loss
diabetes
O skin cancer
Answer:
stroke
Explanation:
Element Rand Element Q have the same number of valence
electrons. These elements both have similar chemical behavior, but
Element R has fewer energy levels than Element Q. Which statement best
describes the positions of the two elements in the periodic table?
I know I'm answering super late, but I just want to help others who don't know the answer
Answer:
H. The two elements are in the same group, with Element R just above Element Q.
Explanation:
When answering a question like this, I would highly recommended using a periodic table. I used a periodic table to find the answer to the question.
Identifying Qualitative and quantitative Data
Sort the data collected about a colony of bacteria into qualitative or quantitative data.
spreads across plate
Qualitative Data
Qua
200 purple colonies total
circular in shape
stained purple
75 colonies did not stain purple
55 colonies grew at room temp
Answer:
qualitative data : quantitative data :
circular in shape 75 colonies ...
stained purple 200 purple ..
spreads across plate 55 colonies ...
Explanation:
i got it right :) .
Answer:
Same XD Have a bless day ^﹏^^O^^O^^O^
Explanation:
Select the correct responses to the questions from the drop-down menus.
Which type of precipitation freezes when it comes into contact with a cold surface?
Which type of precipitation is round pellets of ice more than 5 millimeters in diameter?
Which type of precipitation is water vapor that condenses into ice crystals in clouds?
Answer:
Which type of precipitation freezes when it comes into contact with a cold surface?
✔ freezing rain
Which type of precipitation is round pellets of ice more than 5 millimeters in diameter?
✔ hail
Which type of precipitation is water vapor that condenses into ice crystals in clouds?
✔ snow
Explanation:
The type of precipitation that freezes when it comes into contact with a cold surface is freezing rain.
The type of precipitation that is round pellets of ice more than 5 millimeters in diameter is hail.
The type of precipitation where water vapor condenses into ice crystals in clouds is snow.
Freezing rain is the rain that is maintained at a temperature that's below freezing by ambient air mass. It's made entirely of liquid droplets.
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What would be the formal charge of N in NO2?
Answer:
What would be the formal charge of N in NO2?
Explanation:
The nitrogen gets two electrons for the double bond, one from the single bond and one from the half-filled orbital associated with it. That's a total of 4 and gives N a +1 formal charge since itneeds 5 to be neutral. The Rules for Writing Lewis Structures has some discussion of formal charge in it.
what are the names of the subatomic particles in an atom
Answer:
Protons, Neutrons and electrons
Explanation:
what’s the answer??
Answer:
7.0
Explanation:
P1V1=P2V2 if temperature and moles are constant, which they appear to be
3.5*2.5=1.25x
x=8.75/1.25
x=7
What is the air temperature 8,850 m in the air?
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.