Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. ... A chemical property describes the ability of a substance to undergo a specific chemical change.
Explanation:
9. Use dot and cross diagrams to represent the following compounds.
a. Sodium chloride (NaCl)
Answer:
I have attached the diagram
What did John Dalton contribute to the understanding of the atom?
John Dalton contribute to the understanding of the atom that all matter was composed of atoms, indivisible and indestructible building blocks.
While all atoms of an element were identical, different elements had atoms of differing sizes and mass.
What is an atom?An atom is a particle of matter that uniquely defines a chemical element.
An atom consists of a central nucleus that is usually surrounded by one or more electrons.
Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties.
Dalton based his theory on the law of conservation of mass and the law of constant composition.
The theory states that all matter is made of atoms, which are indivisible.
(1) All matter is composed of tiny, indivisible particles, called atoms, that cannot be destroyed or created.
(2) Each element has atoms that are identical to each other in all of their properties.
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The statement "If I put fenders on a bicycle,
then they will keep the rider dry when riding
through puddles" is an example of
A. an observation.
B. a hypothesis.
C. a theory.
Which question can be answered by science?
Group of answer choices
Why should we help those less fortunate than us?
Which type of candy tastes the best?
Which kind of backpack do students purchase most often?
Why are children happy when they get home from school?
Answer:
C.
Explanation:
Which of the following is a measure of the amount of matter than object contained.
Weight
Mass
Volume
density
Answer:
weight = newton
mass = kilogram
volume = cubic meter
density = kilogram per cubic meter
Answer:
weight hghhiixjdhdhbdnfnfjfjjcndndnfmckkxkx
Infrared radiation A) Heat from warm objects, used to detect the location of objects Microwaves B) All the radiation humans can see, ranging from red to violet Ultraviolet light C) Used in radar and to heat food Visible light D) Given off by very hot objects, such as the sun
Answer:
Infrared radiation → A) used to detect the location of objects
Microwaves → D) Used in radar and to heat food
Ultraviolet light → C)Given off by very hot objects, such as the sun Heat from warm objects
Visible light → B) All the radiation humans can see, ranging from red to violet
Explanation:
Microwaves have magnetic waves with very long lengths, greater than that of infrared light. These waves are produced through vibrations that produce heat, as the microwave is turned on, which allows the food to be heated. These waves are also used to provide communication on some types of devices.
Infrared radiation is a type of non-ionizing radiation that has a low frequency and therefore cannot be visualized, since it is not within a visible electromagnetic spectrum, having a frequency lower than red. It can be used to detect the licalization of objects and does not pose a health risk.
Ultraviolet radiation is extremely harmful to our body. It is characterized by radiation with very small wavelengths, less than 400nm. This type of radiation can be released by the sun and ultraviolet lamps.
Visible light refers to the simplest form of electromagnetic wave and covers all the radiation that our eyes can see, allowing different colors to be seen in the objects we observe according to the reorganization of atoms and molecules.
Answer:
A=Microwaves
B=Ultraviolet light
C=Visible light
D=Infared radiation
Explanation:
A) Used in radar and to heat food
B) Given off by very hot objects, such as the sun
C) All the radiation humans can see, ranging from red to violet
D) Heat from warm objects, used to detect the location of objects
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How do you convert 34.6 kilograms to micrograms?
Also the Steps that got you that answer
How much space would one mole of grass take up?
Answer:
If there's a grass area in the shape of a square and one side is 8 metres how much would it cost to fill the grass with fresh gravel at $5/metre
Periodic Trends
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Write the following value in decimal form
8.99 x 10^-7
Answer:
0.000000899
Explanation:
8.99x10^-7
move the decimal to the left 7 times.
0.000000899
Answer:
0.000000899
Explanation:
.,.......,.........
There are many different kinds of metals found inside the Earth. Gold and silver are two metals used in jewelry because of their shiny appearance and their ability to bend and shape easily. Which of the following characteristics represents the ability of a substance’s shape to be bent?
A. luster
B. boiling point
C. melting point
D. malleability
Answer:
it is ductile
Explanation:
because malleability is made into thin sheets
The electron configuration for aluminum (Al) is shown below:
1s22s22p63s23p1
Which diagram shows the correct distribution of electrons in the electron shells of an aluminum atom?
A small orange dot is surrounded by 5 concentric circles. The inner ring has green dots at the north and south positions. The second ring has green dots at east and west. The third ring has six dots, at the north, northeast, southeast, south, southwest, and northwest. The fourth ring has dots at the north and south, and the outer ring has one dot at the west position.
A small orange dot is surrounded by two concentric circles. The inner circle has 6 green dots spaced approximately evenly across the circle. The outer circle has 7 dots, also approximately evenly spaced; none are aligned with dots in the inner circle.
An orange dot has 3 concentric circles surrounding it. The innermost circle has green dots at the north and south positions. The center circle has 8 dots spaced unevenly. The outer circle has three dots, spaced so that two are closer to each other than either is to the third.
An orange dot is surrounded by a concentric circle. 13 closely spaced green dots lie on that outer circle.
Answer:
It is the third choice
Explanation:
Just did assignment
Answer:
It's C
Explanation:
Which is always the first step in dealing with an accident in the lab?
A. Call the emergency number, 911.
B. Call the fire department.
C. Notify the teacher.
D. Read the MSDS information.
Are corals minerals? Why?
Answer:
yes they are minerals becomes they contain components that have things minerals contians.
Explanation:
How is a controlled experiment performed?
What strategies are involved in solving a science problem?
Answer:
In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. State what steps you will take to design an experiment to test your hypothesis. Complete the experiment. Make observations. Record what happened during your experiment.
Which of the following are signs of a chemical change/reaction? Select all that apply.
1. A change in mass.
2. A change in energy (hot, cold, light)
3. A change in volume.
4. A change in odor.
5. A change in color.
6.A change in phase/state.
7. Boiling.
8.Melting.
9. Freezing.
Answer:
the answers are
Explanation:
5,6,7,8&9.
which contains the most amount of energy a glass of water at 20C or a glass of water at 80C. EXPLAIN ANSWER
Answer:
80C
Explanation:
As a substance gets hotter, or as a substance gets closer to the state of gas, the particles in the substance move faster, become more spread out and have more energy. This is why Gas has the most energy while solids have the least. Therefore, the hotter a substance is the more energy it has.
A glass of water at 80°C will have the most amount of energy
Explanation:
The temperature is defined as the degree of hotness and coldness of the object.It is a measure of the average kinetic energy of the particles of the object.The hotter the object, the higher will be the kinetic energy of the particles of the object, higher will be the value of temperature.The colder the object, the lower will be the kinetic energy of the particles of the object, lower will be the value of temperature.So, from this, we can conclude that glass with water at a higher temperature that is 80°C will have a higher amount of energy than a glass of water at 20°C.
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Maria’s class has learned how to drop an egg without breaking it. After 0.2 s, the kinetic energy of the falling egg is 0.5 J. If its mechanical energy is 2.3 J, what is its potential energy?
A. 1.2 J
B. 1.8 J
C. 2.8 J
D. 4.6 J
The Potential energy of the body is 11.8 Joules
The mechanical energy of the egg is given by the formula:
Mechanical energy = Potential energy + kinetic energy
Given the following parameters;
Mechanical energy = 2.3 JoulesKinetic energy = 0.5 JoulesFrom the formula:
Potential energy = ME = KE
Potential energy = 2.3 - 05
Potential energy = 1.8 Joues
Hence the potential energy of the body is 11.8 Joules
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The density of water is ____________.
Answer:
The density of water is 1 g/mL.
Explanation:
if 11 molecules of monosaccharides with the formula C6H12O6 are assembled to produce a complex carbohydrate, how many atoms of hydrogen be in the final polymer?
What are chemical sedimentary rocks formed from?
Answer:
Elements in fluids.
Explanation: They're formed from elements crystalizing in fluids (Like water.) For example limestone forms on the bottom of the ocean from calcium.
Answer:
The precipitation of ions in solution
Explanation:
How many Protons, electrons, and neutrons are in Dysprosium?
EASY POINTS?
Answer:
Number of Protons - 66
Number of Neutrons - 97
Number of Electrons - 66
Explanation:
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all smart people i need help
Answer:
its b
Explanation:
Answer: the first box
Explanation:
Which group of elements should all have similar chemical behavior?
magnesium, strontium, and sodium
b) sulfur, phosphorus, and silicon
c) hydrogen, oxygen, and nitrogen
d) argon, helium, and neon
Answer:
the correct answer is D
Explain how balancing chemical equations relates to the law of conservation of matter.
Answer:
Normally, it explains that matter cannot be created or destroyed. It demonstrates different chemical reactions that help show the different transformations of the matter but will never destroy it or create it.
When scientists obtain new information, what happens to an existing scientific theory?
It is revised
It is reevaluated
It becomes a law
It remains the same
Answer:
It is reevaluated
Explanation:
Because of this new evidence, the theory can change, so the scientists must reevaluate the theory
People were surveyed to find out which part of the smore they like best. The data is as follows: 75% chocolate, 20% marshmallow, 5%. This information would be best displayed by aImmersive Reader
a. line graph
b. scatter plot
c. pie/circle graph
d. bar graph
Answer:
Pie/Circle graph
Explanation:
Pie/Circle Graphs are best for demonstrating parts of a whole, especially with percents.
Animals and Animal-like Protists share some characteristics. Tell how the organisms in these groups are the same? Why do you think scientists have placed them in different groups
Answer/Explanation:
Animals are multicellular heterotrophic organisms, meaning they cannot generate their own food, they rely on external sources of nutrition.
Protists are any eukaryotic organism that cannot be classified as an animal, plant, or fungus. The grouping is more used for convenience than anything else.
Like animals, animal-like protists can move freely and are heterotrophic. However, unlike animals, they are usually unicellular, and much simpler than animals
What is a Hypothesis?
Answer:
A hypothesis is a claim you make about what you think is going to happen in an experiment.
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Energy and wavelength have a (n)___
relationship