Answer:
1
all matter is made of tiny particles called atom
What are the three principles of Kinetic Molecular Theory
Answer:
The simplest kinetic model is based on the assumptions that: (1) the gas is composed of a large number of identical molecules moving in random directions, separated by distances that are large compared with their size; (2) the molecules undergo perfectly elastic collisions (no energy loss) with each other and with the
Explanation:
Oxygen can be produced in the laboratory by the reaction
2KClO3———-> 2KCl+3O2
How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37°C and 94.9 kPa? The vapor pressure of water at 37°C is 6.28 kPa.
Answer:
5.2g potassium chlorate is needed to do so
item 3 steel is an alloy containing fe atoms and c atoms. which of the following diagrams best represents the particle-level structure of steel?
An alloy is obtained when an element is combined with another physically and not chemically. The image that accurately represents steel is the image in which carbon atoms are sandwiched between iron atoms.
Steel is an alloy of iron and carbon. In an alloy, the atoms one element is sandwiched in between atoms of another element in its crystal. Usually, allows are formed to improve certain desired properties of substances. The percentage of carbon included in steel depends on its intended use.
The image that can be used to represent the formation of steel is the image shown in B. In that image, small atoms of carbon are seen sandwiched between larger iron atoms. That is the accurate description of steel.
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C) equally shared and form nondirectional bonds
Explanation:In metals, electrons are free to move as described by the electron sea model. Electrons are shared equally among atoms, and the structure is based on simple close-packed structures that contain no fixed directional bonds.
what are some of the activities performed during experiment
Was arsenic able to replace Phosphorus in DNA?
Answer:
Arsenic-tolerant GFAJ-1 bacteria were reported to have replaced some of the phosphorus (P) in their DNA with arsenic. ... These bacterial cells were very efficient at using the small amount of available phosphate in preference over the easily available arsenic. so yes.
Explanation:
hope this helps
Answer:
Yes
Explanation:
Hope everything goes well with your work :D
Predict what would happen if plants disappear?
Decomposers will die because they will lose their food source.
All secondary consumers will die because they will lose their food source.
Oxygen will only be available during the daytime.
There will be a limited amount of oxygen in the air.
Answer:
All secondary consumers will die because they will lose their food source
Which of the following is a physical change?
evaporation
explosion
rotting of food
corrosion
Answer:
i believe it is c
evaporation
Explanation:
Hope it's the correct one if not very sorry.
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The solubility of oxygen gas in water is increased by which of the procedures shown below?
Select one:
a. Decreasing the temperature of the solution.
b. Decreasing the pressure on the solution.
c. Increasing the temperature of the solution.
d. Stirring the solution.
Answer: b
Explanation:
1. Cooking pots are provided with wooden or plastic handles .Why?
Answer:
So the heat doesn't transfer to the handle and heat it up causing you to burn yourself in cooking process
Explanation:
Hope this helps! Happy Halloween
Cooking pots are provided with wooden or plastic handles because wood or plastic handles are bad conductors of heat. Hence, the heat from the hot appliances does not flow to our hands with the result that we can handle them without any difficulty.
calculate the kinetic energy of a baseball (mass = 5.25 oz) with a velocity of 1.0 x 10^2 mi/h
Answer:
262.5 Joules
Explanation:
You find the kinetic energy of multiplying half of the mass by the velocity. In this word problem it tells you the mass so you divide it by 2. That answer is 2.625, you then multiply that by the velocity, in this instance it's 1.0 x 10^2 mi/h.
The unit in kinetic energy is Joules. This is actually a really important part in chemistry and physics.
The kinetic energy of a baseball (mass = 5.25 oz) with a velocity of 1.0×10² mi/h is 147.88 joules.
How do we calculate kinetic energy?Kinetic energy of any object will be calculated by using the below equation:
K.E. = 1/2(mv)², where
m = mass of object in kg = 5.25 oz = 0.148 kg
v = velocity in m/sec = 1.0×10² mi/h = 160934 m/h = 44.704 m/s
On putting values on the above equation, we get
K.E. =1/2(0.148)(44.704)²
K.E. = 147.88 joules
Hence required kinetic enrgy is 147.88 joules.
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the part of an atom that has an overall positive charge is called
Bases react with carbon dioxide and from............. and water
Answer:
I believe the answer is B. Carbonates
Explanation:
Assume that wave B has a wavelength of 415 nm. Calculate the frequency of the wave. The value for c is 3.00 x 10 8 m/s. The wavelength of wave A is [__________]Hz.
The wave B has wavelength of 415 nm. The value for c is 3.00 x 10 8 m/s. The frequency is 7.22 x 10¹¹ Hz.
What is frequency?Frequency is defined as the number of waves passing through a fixed point in a given amount of time.
The frequency can also be defined as a repeated event is the number of occurrences per unit of time.
Frequency can be expressed as
f = c / ∧
Where c = 3.00 x 10⁸ m/s
∧ = 415 nm
So, f = 3.00 x 10⁸ m/s x 415 nm
f = 7.22 x 10¹¹ Hz.
Thus, the wave B has wavelength of 415 nm. The value for c is 3.00 x 10 8 m/s. The frequency is 7.22 x 10¹¹ Hz.
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Disease caused by virus are more dangerous.Why?
Answer:
Explanation:
1. Virus's are hard to detect because of their simple construction.
2. Some mutate very easily.
3. It is hard to isolate the virus and kill it without doing damage to the host.
Write a 125 word summary of what you have learned in "Introducing the Microscope". Be sure to include steps on how to focus, how to solve for magnification, and what a field of view is and how to measure it.
Answer:
Introduction to Basic Microscopy. Microscopes are specialized optical instruments designed to produce magnified visual or photographic (including digital) images of objects or specimens that are too small to be seen with the naked eye.
Microscope are the important tools which are used by scientist. For example, in material science, medicine, mineralogy and microbiology.
Light microscope is able to send light. Light is being focused in a tight breath whereby that light passes through a sample which later it is able to create an image. This image passes to different lenses which magnifies it until it reaches the camera.
There are different types of microscope for example, Compound light microscope, Simple light microscope, and monocular microscope.
In simple light microscope only one lens which which is being used to magnify an object and it is not able to reach to a higher magnification.
In compound light microscope it uses two lenses to produce image. For example eyepiece lens and objective lens.
Explanation:
write the stracture of 2,2-dimetyl butane
Answer:
Explanation:
Let's break it down:
Butane- A 4 carbon alkaneMethyl - A CH₃ group2,2 - Both the Methyl groups are attached at carbon 2We can now draw the structure of 2,2-dimethyl butane using the following steps:
Draw the backbone (butane)Draw the substituents (2 methyl groups at carbon 2)Atomic Number
Atomic Mass Number
Protons
Neutrons
Electrons
Charge
Element 1
6
12
A
6
6
B
Element 2
6
13
6
C
D
1+
Look at the above table.
What charge (B) should Element 1 have
Question 2 options:
0
6
12
1+
Answer:
B for element 1 0 charge
Explanation:
Atomic Number
Atomic Mass Number
Protons
Neutrons
Electrons
Charge
Element 1
6
12
A
6
6
B
Element 2
6
13
6
C
D
1+
Look at the above table.
What charge (B) should Element 1 have
Question 2 options:
0
6
12
1+
from the data we can construct the following table
element 1 element 2
Atomic # 6 6
Atomic mass 12 13
protons 6 6
neutrons 6 7
electrons 6 5
charge 0 +1
the atomic # of both is 6, so they are both carbon with 6 protons
element 1 has a total of protons plus neutrons of 12, element 2 of 13
so element 1 has 6 neutrons,element 2 has 7
element 2 has a +1 charge with 6 protons, so it has only 5 negative electrons
element 1 with 6 protons has 6 electrons, so it has a 0 charge
An atom will be neutral ONLY if
Answer:
They have the same number of charged protons and electrons, therefore balancing positive and negative charges. I hope this helps you.
Explanation:
Number 8 question need help
Answer:
where is the question
Explanation:
pls. send it
What did the periodic table help scientists discover?
Scientists can use the table to analyze reactivity among elements, predict chemical reactions, understand trends in periodic properties among different elements and speculate on the properties of those yet to be discovered.
How would one convert 6 pounds to ounces (16 oz = 1b)?
Answer:
D.
Explanation:
I just got it right in the test :)
hello can anyone help?
Potassium, K, forms a compound with fluorine, F
Which statements about this compound are correct?
1) The compound is ionic.
2) The formula of the compound is KF.
3) The compound is soluble in water.
A) 1 2 and 3
B) 1 and 2 only.
C) 1 and 3 only
D) 2 and 3 only
Answer:
A ) 1, 2 and 3
Explanation:
1 ) is correct because,
K donates 1 electron
F gain 1 electron from K.
If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.
2 ) is correct because,
K + F -----> KF
3 ) is correct because,
KF is soluble in cold water; very soluble in hot water.
mass=35g, density=5g/cm3. what is the volume?
Answer:
7 cm^3
Explanation:
Density = Mass/Volume
5 = 35/x
multiply both sides by x to get
5x = 35
then divide by 5
so x = 7 cm^3
Physical change definition.
NO links, please.
Answer:
a usually reversible change in the physical properties of a substance, as size or shape:
Freezing a liquid is a physical change.
Explanation:
Answer:
Hey!
Explanation:
The definition of physical change can be expressed as.. let's say.. the physical difference in an organism. Physical change affects the form of a chemical substance, but not its chemical composition. Hope this helps! :)
An element is composed of one type of atom with its own unique properties. TRUE OR FALSE
Answer:
It's true
Hope it helps:-)
Answer:
true
Explanation:
6. Haydee prepared a solution with 3mL of potassium chloride (KCl) in 200 mL of water is prepared. Calculate the percent by volume concentration of the solution.
A. 1.46% B.1.48 %
C. 1.49 % D. 1.50%
Considering the definition of percent by volume concentration, the correct answer is option D: the percent by volume concentration of the solution is 1.50%
Percent by volume concentration is a measure of concentration that indicates the volume of solute per 100 volume units of the solution. This value is calculated by dividing the volume of the solute by the total volume of the solution, and multiplying by 100 to express it as a percentage:
[tex]percent by volume concentration=\frac{volume of solute}{total volume of the solution}x100[/tex]
In this case, you know:
volume of solute= 3 mLtotal volume of the solution= 200 mLReplacing in the definition of percent by volume concentration:
[tex]percent by volume concentration=\frac{3 mL}{200 mL}x100[/tex]
Solving:
percent by volume concentration=0.015×100
percent by volume concentration=1.50
Finally, the correct answer is option D: the percent by volume concentration of the solution is 1.50%
Learn more:
https://brainly.com/question/17138083. Write balanced ionic equations to show the dissolution of the following compounds in water: a) magnesium chloride
Answer:
MgCl2 + H2O
Explanation:
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What happens to food molecules during cellular respiration?
They undergo chemical reactions with carbon dioxide, releasing stored energy.
They undergo reactions in which the atoms are destroyed to produce energy.
They undergo chemical reactions to produce large, complex molecules.
They undergo chemical reactions with oxygen, releasing stored energy.
Answer: They undergo chemical reactions with oxygen, releasing stored energy.
Explanation:
I took my k12 7th grade science unit test and got this question correct.
Have a good day and drink some water plz
The food molecules during cellular respiration they undergo chemical reactions with oxygen, releasing stored energy.
What is chemical reaction?Chemical reaction is defined as a procedure in which one or more substances, known as reactants, are converted into one or more different substances, known as products.
It can also be defined as a method of chemically transforming one set of chemical substances into another.
There are basically six types of chemical reaction.
Combustion reactionDecomposition reactionNeutralization reactionRedox reactionPrecipitation reactionSynthesis reactionCellular respiration is defined as the process of oxidizing biological fuels in the presence of an inorganic electron acceptor such as oxygen to produce large amounts of energy, which drives the bulk production of ATP.
It can also be defined as the process by which sugar from food is converted into energy within cells.
Thus, the food molecules during cellular respiration they undergo chemical reactions with oxygen, releasing stored energy.
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the nucleus or center area of the atom contains two kinds of subatomic particles. which two?
1. Imagine doing the same virtual experiment using wood as the bottom material, instead of glass or water. Predict how the light would interact with the wood.
The wood can't do the same function as done by the water and glass in the same virtual experiment due to its different chemical composition.
The light will not pass through the wood due to its translucent behaviour that prevents light to pass through it as compared to water and glass which are transparent materials and light can easily pass through it.
So using wood as a bottom material instead of glass and water will not perform the same function as perform by water and glass in the same virtual experiment so we can conclude that wood can't perform the same function in the experiment.
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