Answer:
Here's what I get
Explanation:
1. Names
I. CH₃-CH₂-COOH = 49. propanoic acid
II. CH₃-CH₂-OH = 46. ethanol
III. CH₃-COO-CH₂-CH₂-CH₃ = 47. propyl ethanoate
IV. H-O-CH₂-CH₂-CH₃ = 48. propan-1-ol
V. H-COO-CH₃ = 51. methyl methanoate
VI. CH₃-COOH = 50. ethanoic acid
2. Precursors
52. methyl propionate ⇒ methanol + propanoic acid
53. ethyl methanoate ⇒ ethanol + methanoic acid
What is a scientific method? A. A method of testing an idea B. The steps required to form a hypothesis C. A way of analyzing data D. The process of proving a theory
Answer:
A. A method of testing an idea
Explanation:
The steps of the scientific process involve formulating a hypothesis, testing it, analysing the data, making conclusions, and reporting the findings.
which of the following accurately describes the transmission of sound and waves in seawater? A sound travels faster in seawater because seawater is less compressible than the atmosphere. B sound travels slower in seawater because seawater is less dense than the atmosphere C sound travels slower in seawater because seawater is colder than the atmosphere D sound travels faster in seawater because seawater is less dense than the atmosphere.
Answer:
Salty water is more dens than freshwater. answer is D
Explanation:
The statement which accurately describes the transmission of sound and waves in seawater that sound travels faster in seawater because seawater is more dense than the atmosphere.
What is sound waves?Sound wave is an example of longitudinal wave. It always travel through any medium as it requires some objects to transfer its energy.
Travelling of sound waves is directly depends on the vibration of the particles of the medium and in seawater particles of the water in the form of salt are present in much amount which makes it dense. And due to dense medium sound waves will travel through seawater through the fast speed.
Hence, sound travels faster in seawater because seawater is more dense than the atmosphere.
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Peas contain 250 kJ per 100 g. You would use the equivalent of 600 g of peas if you slept for .
Answer: 7,793 hours.
Explanation:
Let's assume you are about 150 pounds. You would use only 414 calories a night (1.7 kJ). If 250 kJ is 100 g, then 1500 kj is 600 g. So we would need 360000 calories to be eaten. You would have to sleep for about 7,793 hours.
Which of the following would have the best thermal conductor properties?
A. A thick mug
B. A plastic cup
Ос. A paper cup
D. A cup made of metal
Answer:
D
Explanation:
metal is a major cunductor of heat
A cup made of metal would have the best thermal conductor properties.
The answer is option D.
Is a metal cup a good conductor of heat?Metals have unfastened electrons that are not bounded to the atoms. those electrons are unfastened to move around within the metal, colliding with the metal atoms and shifting heat to them successfully. This makes metals higher conductors of warmth than maximum other materials.
Which of the following would have a high-quality thermal conductor?Diamond is the leading thermally conductive material and has conductivity values measured 5x better than copper, the maximum synthetic metallic inside the united states of America. Diamond atoms are composed of a simple carbon spine this is a really perfect molecular structure for an effective heat switch.
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Which of the following describes scientists?
A. People with similar personalities
B. People from different backgrounds
C. People with perfect understanding of science
D. People with only one perspective
Answer:C.people with perfect understanding of science.
Answer:
C. People with perfect understanding of science
Explanation:
Similar personalities, different backgrounds, and only one perspective are just traits of people.
Perfect understanding of science is relating to a scientist. Scientists have high knowledge of science.
Which of the following is not a physical property of water? It is composed of hydrogen and oxygen. It has a boiling point of 100°C. It is a colorless liquid. Sugar dissolves in it.
Answer:
It is composed of hydrogen and oxygen.
Explanation:
What type of bond is formed between hydrogen and nitrogen in ammonia (NH3)? A. polar covalent B. ionic C. nonpolar covalent D. metallic
Answer:
A. Polar covalent
Explanation:
The polarity of a bond depends on the electronegativity difference (ΔEN) between the bonded atoms.
If the electronegativity difference between the atoms is between 0.4 and 1.7, the bond is polar covalent.
For an N-H bond, ΔEN = |3.04-2.20| = 0.84
So, the bond is polar covalent.
B is wrong. A bond is ionic only if ΔEN > 1.6.
C is wrong. A bond is nonpolar only if ΔEN < 0.4.
D is wrong. N and H are not metals.
What does it mean for heat to be transferred by convection?
O A. Energy is transferred through moving currents of warmer air or
liquid.
O B. Energy is transferred through converting bond energy to kinetic
energy
C. Energy is transferred when molecules absorb electromagnetic
wees
O D. Energy is transferred when one molecule collides with another
Answer:
A
Explanation:
It seems most appropriate since it's the transfer of heat in fluids including air
Heat is meant to be transferred by convection as energy is transferred through moving currents of warmer air or liquid which is in option a as it involves the transfer of thermal energy through the movement of a fluid.
In convection process, the warmer regions of the fluid or liquid become less dense, which is causing them to rise. As the warmer fluid rises, it carries thermal energy with it as its properties change. while, the cooler regions of the fluid became denser, and that led to sink. This creates a continuous circulation of the fluid, which helps to distribute the heat in the area.
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What are the units of molality? A. mol/kg B. g/mol C. mol/L D. kg/mol
Answer:
A. mol/kg
Explanation:
hope it helps .
Which describes a climate effect on the rate of weathering? Cold climates favor mechanical weathering. Chemical reactions occur slower at higher temperatures. Lower precipitation levels lead to more chemical reactions. The chemical reaction rates of minerals are not impacted by temperature.
Answer:
the answer is Cold climates favor mechanical weathering.
Explanation:
I got 100% on the Quiz
Statement that describes climate effect on the rate of weathering as regards this question is A:Cold climates favor mechanical weathering.
Weathering can be regarded as disaggregation of rocks into smaller bits by the actions of agents of weathering such as man, animals, water and so on.However, climate can also have effect on the rate of weathering, when there is cold climate, mechanical weathering is favoured.Option B,C,D are wrong because high temperature brings about increase in rate of chemical weathering.
Therefore, option A is correct.
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Explain how it is possible to have a homogeneous mixture of two different compounds. Give an example.
Answer:
Take a look at explanation below.
Explanation:
Part 1 ) A homogeneous mixture of two different substances, by definition, is a solution. A homogeneous mixture itself is known to have same proportions of its components throughout any given sample. Thus it is possible to have two different compounds in this mixture, but still let it distribute among themselves evenly.
_______________________________________________________
Part 2 ) How is this possible? Take the simple example of " mixing salt with water. " This is a solution. The salt ( dissolved material ) is present in the same amount throughout the solution, as it evenly distributes itself.
A homogeneous mixture is formed when;
Two liquids are completely miscibleA solid dissolved completely in a liquidA homogeneous mixture is one in which there is no phase difference. A homogeneous mixture has a continuous uniform composition throughout the system.
For instance, water and ethanol are miscible in all proportions hence a mixture of the two is an example of a homogeneous mixture.
Also, when sugar is dissolved in water, the sugar completely disappears and become a continuous phase. The resulting solution is a homogeneous mixture.
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which diagram(s) represents the bonding pattern of metals? a)A and B
b)C and D
c)A
d)C
the other guy is totally wrong. the answer is a for sure. C is showing a covalent bond between 3 atoms. Metals bond differently. Like shown in a and b. However b is innacurate because it shows the electrons being the largest(since they are negatively charged and there is a - sybmol), and we all know protons are much larger than electrons. SO a is correct because it depicts the positive protons(+ symbol) as the biggest. So go with a.
What is the main reason cells are replaced in the body?
A The cells are too large.
B The cells are inactive.
C The cells are damaged.
D The cells are cancerous.
Answer:
The answer is C
Explanation:
Because when cells are damaged, your body will make new cells to get rid of damaged cells and if you don't, it can become cancerous. For example, if a damaged cell isn't removed, then it might reproduce agian and then you will have sickly cells or cancerous cells.
The possible products of a double displacement reaction in aqueous solution are SrSO4 and NaCl. Which of these possible products will form as a solid in this reaction? Question 8 options: A) SrSO4 B) Neither compound will form as a solid C) Both compounds will form as a solid D) NaCl
Answer:
SrSO4
Explanation:
According to solubility rules, we know that the sulphates of the elements of group two are insoluble in water. The solubility rules describe what chemical species are soluble in water and what species are not soluble in water.
Generally, all chlorides are soluble in water with exception of chlorides such as silver chloride. The chlorides of group one elements are usually highly soluble in water.
Since SrSO4 is a sulphate of a group two element (strontium) it will be the insoluble solid product of the double displacement reaction described in the question.
Answer:
SrSO4
According to solubility rules, we know that the sulphates of the elements of group two are insoluble in water. The solubility rules describe what chemical species are soluble in water and what species are not soluble in water. Generally, all chlorides are soluble in water with exception of chlorides such as silver chloride. The chlorides of group one elements are usually highly soluble in water.
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Atoms are very small. Approximately how many atoms would it take to
make a stack as thick as a potato chip?
A. Thousands
B. Hundreds
C. Billions
D. Millions
Reset Selection
Answer:
Billions
Explanation:
A full stop contains almost trillion of atoms.
Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.
What are atoms?An atom consists of a central nucleus that is usually surrounded by one or more electrons.
Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.
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What determines an element's emission spectrum?
O A. The size of the sample
O B. The mass of the nucleus
O C. The electron energy levels
O D. The number of protons
An elements's emission spectrum determines the electron energy levels and the correct option is option C.
An element's emission spectrum is determined by the specific energy levels of its electrons. When an electron in an atom transitions from a higher energy level to a lower energy level, it releases energy in the form of electromagnetic radiation.
The wavelength and frequency of this emitted light correspond to specific energy differences between the electron energy levels. Each element has a unique arrangement of electron energy levels, leading to a distinct emission spectrum.
By analyzing the emitted light, scientists can identify the element and gain insights into its atomic structure. The size of the sample, mass of the nucleus, and number of protons do not directly determine an element's emission spectrum.
Thus, the ideal selection is option C.
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Which of the following is an accurate description of an ionic bond? Anions and anions attract. Cations and cations attract. Cations and anions attract. Atoms share electrons.
Answer:
Atoms of different elements, having gained or lost electrons, form negative and positive ions that are bonded together by attractive forces between ions with opposite charges.
Explanation:
The atoms have different numbers of neutrons and the same number of protons. hope this helps you :)
Dogs can have different coloured coats, this is known v________
Answer:
Genes Rule
Explanation:
The color of a dog's coat is basically at the mercy of his gene pool. Genes do two things that determine a dog's appearance. They control the pigments produced (eumelanin and phaeomelanin) and where these pigments are produced.
In the electron configuration for scandium (atomic number 21), what is the
notation for the three highest-energy electrons?
Select one:
O a. 30% 452
O b. 453
O c. 3d3
O d. 452 4p?
Answer:
Explanation:
d. 452 4p
hope it helps
what causes the difference genetically identical organisms
Answer:
the epigenetic perspective. ... Such variation among organisms with virtually identical chromosomal DNA sequences has largely been attributed to the effects of environment.Explanation:
What makes the atomic radius change down a column of the periodic table?
O A. The greater number of total electrons, the larger the atomic radius.
O B. The more valence electrons listed, the larger the atomic radius.
C. The more sublevels occupied, the larger the atomic radius.
O D. The larger the highest energy level number, the larger the atomic
radius.
Answer:
As you go across a period, radius shrinks because you are adding protons. The added positive charge increases pull on the electron shells. So I believe the answer is D
The statement, that describes the atomic radius change down a column of the periodic table is "the larger the highest energy level number, the larger the atomic radius."
What is atomic radius?The size of an atom is described by its atomic radius. Atomic radius is commonly defined as the total distance from an atom's nucleus to the electron's outermost orbital.
The atomic radii of elements steadily grow from top to bottom in a group. As we move down the group, the atomic number rises, and so does the number of shells. Furthermore, as we advance down the group, the valence electrons are present in a higher shell, increasing the distance of the valence electrons from the nucleus. As a result, the attraction between the nucleus and the valence electron weakens. When a result, as one moves along a group, the atomic radius grows.
As the number of energy levels (n) decreases down a group, the distance between the nucleus and the outermost orbital rises. As a result, the atomic radius increases.
Hence, the correct option is D.
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ASAP
Why do elements within a period of the periodic table have different
properties?
A. They have different arrangements of core electrons.
B. They have different numbers of valence electrons.
C. Some are metals and some are nonmetals.
D. They have different combinations of protons and neutrons.
Answer:
It’s b
Explanation:
(Apex)
They have different numbers of valence electrons. Hence, option B is correct.
What are elements?Elements are the simplest substances which cannot be broken down using chemical methods.
Elements within the same period have different numbers of electrons in their valence shells from left to right and different electron configurations. Thus, all elements in the same period are chemically different from each other.
Hence, option B is correct.
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Which of the following is a combustion reaction?
O A. CO2 + H2O + H2CO3
O B. CzHg + 502 → 3002 + 4H20
O C. MgSO4 + Ba → BaSO4 + Mg
D. NaOH + HCl → NaCl + H2O
Who is correct? Reggie, because baking and melting cause bonds to be broken, leading to a chemical change. Reggie, because objects that are heated always undergo chemical changes. Charlotte, because melting objects only sometimes cause a chemical change. Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.
Answer: Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.
Explanation: Baking is a chemical change you cant turn it back to what it was before. Its chemical properties have changed. Melting is a physical change. Its chemical properties are still the same it has not changed. It just changed it's physical form but the object is still the object.
Answer:
Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.
Explanation:
took the quiz on edge
An element is:
A. A compound formed when different atoms react and form bonds with each other.
B. A pure chemical compound consisting of multiple atomic numbers.
C. A pure chemical substance consisting of one type of atom.
D. Two or more compounds that are mixed together but not chemically bonded.
Reset Selection
The world's record for the largest cup of coffee was broken on October 15, 2010 with a 2010 gallon cup of coffee in Las Vegas, Nevada. If a cup of coffee contains 318 mL of coffee, how many cups of coffee would be required to fill the world record coffee cup?
Answer: 23927 cups of coffee would be required to fill the world record coffee cup.
Explanation:
Volume of cup of coffee = 318 ml
Volume of largest cup (world record coffee cup) of coffee = 2010 gallon
Volume of largest cup of coffee in ml = [tex]2010\times 3785.41=7608678ml[/tex] ( 1 gallon = 3785.41 ml)
To find : Number of cups of coffee to fill world record coffee cup = x
Thus as we know :
[tex]{\text {Number of cups of coffee to fill world record coffee cup}}\times {\text {Volume of cup of coffee}}={\text {Volume of largest cup (world record coffee cup) of coffee}}[/tex]
Putting in the values we get:
[tex]x\times 318ml=7608678ml[/tex]
[tex]x=23927[/tex]
Thus 23927 cups of coffee would be required to fill the world record coffee cup.
What significant contribution did Lavoisier make to chemistry?
A. He was the first to use scientific experiments to learn about
atoms.
B. He was the first to discover the atom.
C. He was the first to propose the atomic theory.
D. He was the first to split the atom.
A significant contribution that Lavoisier made to chemistry is that he was the first to propose the atomic theory that is in Option C, the atomic theory was critical for understanding and studying atoms.
What is the significance of the Lavoisier?His contribution is significant because he made significant contributions to the fields of chemistry and biology, such as the discovery of oxygen, and also gave the concept of conservation of mass of the atoms, which is why he is known as the "Father of Modern Chemistry," as well as he is well known for his experimentation and precise measurement.
Hence, a significant contribution that Lavoisier made to chemistry is that he was the first to propose the atomic theory that is in Option C, the atomic theory was critical for understanding and studying atoms.
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Answer ASAP
How do ethical concerns affect scientific research?
Answer:
Short answer is ethical concerns pose as limits.
Explanation:
As a scientist, one would want to research anything with limited possibilities. You would have to make sure however you're planning to test you hypothesis is safe for the environment (the people, the plants, the animals, and the earth in general)
8. What is an energy level?
A)The region outside the nucleus where the neutron is likely to be moving.
B)The region outside the nucleus where the electron is likely to be moving.
C)The region outside the nucleus where the proton is likely to be moving.
D)The region inside the nucleus where the electrons are located.
Answer:
B. The region outside a nucleus where the electron is moving
Explanation:
The more the electron moves, the higher energy level it has, the slower the electron moves the lowwer energy level it has.
Answer:
Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center. Energy levels are a little like the steps of a staircase. You can stand on one step or another but not in between the steps. The same goes for electrons. They can occupy one energy level or another but not the space between energy levels.
:D
Consider the following reversible reaction.
Answer:
B is the correct option
Explanation:
K= the ratio of product of concentration of products to the product of concentration of reactants raised to power equal to their cofficients.
Answer:
aaaaa
Explanation:aaaaaaa