Answers
Related Questions
What is the only force that acts on a falling body when it is in free fall?
Answers
Answer:
Gravity
Explanation:
Objects that are experiencing free fall, are not encountering a significant force of air resistance or as a matter of fact any other kind of forces, they are falling under the complete control of gravity.
Which of the following statements is true about single-replacement reactions?
1)They are restricted to metals.
2)They involve a three products.
3)Both the reactants and products consist of an element and a compound.
4)Any metal replaces any other metal.
Answers
Explanation:
i think is, They involve a three products.
The statement which is true about single-replacement reactions are:
3) Both the reactants and products consist of an element and a compound.
Single-replacement reactions :These reactions are also known as single displacement reactions, in this type, the ions of the metals or elements get exchanged with the other element and lead to the formation of a new product.
Example: [tex]2K+2H_2O--- > 2KOH+H_2[/tex]
The ions of water get exchanged with potassium and form a new salt that is potassium hydroxide.
Thus, option 3 is correct.
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How do the physical and chemical properties of wood contribute to the function of the synthetic products made of wood?
Answers
Wood's tensile strength is reduced. Another risk factor for the strength of the wood is the loading time. The rigidity of wood is affected by temperature.
What is wood?Wood is one of the most common and useful natural materials. It is the main tissue that supports and conducts nutrients in trees and other plants. Wood comes in a variety of colours & grain patterns and is produced by numerous botanical species, comprising both gymnosperms & angiosperms.
Its wood's tensile strength is reduced. Another risk factor for the strength of the wood is the loading time. The rigidity of wood is affected by temperature. Unfavourable weather and unexpected temperatures will have an impact on the wood's strength. Among its attributes are mechanical, chemical, and physical qualities.
Therefore, wood's tensile strength is reduced. Another risk factor for the strength of the wood is the loading time.
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Balance the combustion reaction between octane and oxygen. 2C8H18 + O2 → CO2 + H2O
Answers
Answer: 2C8H18 + 25O2 -> 16CO2 + 18H2O
Explanation:
what is the net force of 2N 1N 4N?please
Answers
Answer: 7N
Explanation:
I hope this helps :)
equivalent mass of AL2O3
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Answer:
[tex]Mass = 102g[/tex]
Explanation:
Given
Compound: [tex]Al_2O_3[/tex]
Required
Determine the equivalent mass
In the above compound, we have: 2 Al and 3 (O)
The atomic mass of Aluminium is:
[tex]Al = 27[/tex]
The atomic mass of Oxygen is:
[tex](O) = 16[/tex]
So, the equivalent mass is:
[tex]Mass = 2 * 27 + 3 * 16[/tex]
[tex]Mass = 54 + 48[/tex]
[tex]Mass = 102g[/tex]
What very specific property of mineral calcite allows geologists to quickly identify it in a mixture of other colorless minerals
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Other Identifying Characteristics
Calcite is easy to identify even without testing the reaction to HCl, by its hardness, luster and cleavage. Another special property is magnetism
Jane believe that plate tectonics is a theory, and Mario believes it is a law. Which of the following best support Jane's argument?
Answers
Answer:
A
Explanation:
i did this and its right
The following compounds will
decompose on heating except
A Ag2CO3.
B. CaCO3.
C. K2CO3
D. PbCO.
E. ZnCO3
Answers
AnsThe option C is correct
30 protons 30 electrons how many nuetrons
Answers
Answer:
34 neutrons.
Explanation:
Hope this helps!!
Please help first to answer will get brainliest.
A model of the water cycle was made by adding a small amount of water into an aquarium, covering the aquarium with a piece of glass, and placing a lamp over the glass cover to add heat. What does the lamp represent when comparing this model to the real-life water cycle?
( A)Clouds
( B)Precipitation
( C)The ocean
( D)The sun
Answers
Answer:
D the sun
Explanation:
The sun adds heat to make the water evaporate.
Answer:
B)
Explanation:
The sun causes evaporation by heat, the lamps bulb will get hot and be a model of the sun. We know this because heat evaporates water.
Using principles of atomic structure, explain why the atomic radius of Te is less than the ionic radius of Te2− . Photoelectron spectroscopy data for the 1s sublevel of Te and the 1s sublevel of O are represented below. In terms of Coulomb's law and atomic structure, explain why the peak for O is positioned so far to the right of the peak for Te .
Answers
Answer:
See explanation
Explanation:
Let us recall that a negative ion is formed by addition of electrons to an atom. When electrons are added to the atom, greater interelectronic repulsion increases the size of the Te^2− hence it is greater in size than Te atom. Therefore, the ionic radius of Te^2− is greater than the atomic radius of Te.
In the second question, oxygen is positioned so far to the right because it has a far smaller nuclear charge compared to Te. Hence in the PES spectrum, the 1s sublevel of oxygen lies far to the right of that of Te.
Using principles of atomic structure, the reason why the atomic radius of Te is less than the ionic radius of Te²− is because of the Electrostatic force of repulsion between the negatively charged electrons of Te²- thereby causing the ion to be bigger than the neutral atom.
We must remember that negative ions are formed as a result of the addition of electrons to an atom.On this note, the electrostatic force of repulsion between the negatively charged electrons of Te²- ion becomes greater. Hence, the Te atomic radius is less than the ionic radius of the Te²- ion.By considering the second scenario, the element oxygen is positioned so far on the right because it has a very much smaller nuclear charge compared to Te.
As a result, in the PES spectrum, the 1s sublevel of oxygen lies far to the right of the 1s sublevel of Te.
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Jonah realize even though she’s crushing the cans in the amount of material in the can is unchanged which of the following describes the reaction that is taking place
Answers
a change in form or appearance of matter
Explanation: CAUSE IT STILL IS THE MATERIAL JUST IN A DIFFERENT SHAPE
Answer:
A change in form, or appearance of matter. Is your answer, can I have Brainliest? :) Have a great day! Hope it's right!
You are asked to get a compound that has a low melting point and cannot
conduct electricity, which would you pick if you saw three bottles labeled as LICI,
NaBr, and BrF. What type of bond did you get?
Answers
Answer:
the third
Explanation:
A bus travels 20km in 30 min what is the average speed of the bus
Answers
Answer:
40km/h
Explanation:
v=20km/0.5h=40km/h.
Answer:
average speed=distance/time
speed=20/30
speed=2/3
what is CdF^4 compound name
Answers
Answer:
well it might be 1.)Cadmium Fluoride CdF2 150.4078
2.)Cadmium(II) Perfluorate Cd(FO4) 2278.403
3.)Cadmium Ferrocyanide Cd2Fe(CN) 6436.7714
Explanation:
What is the lon # for Beryllium (Be)?
Answers
Answer:
Number: 4
Charge: +2
Element: Beryllium
I hope this helps!! :)
SOMEONE HELP ME PLEASE
Radiation
conduction
convection
Answers
Answer:
radiation
Explanation:
17.
Which of the following gases is used
in the demonstration of fountain
experiment?
A. CH
B. CO
C. HUS
D. NH3
E. SO2
Answers
Answer:
ammonia gas and hydrogen chloride gas.
What happens when molten material travels along the underside of the crust?
Answers
Answer:
Explanation:
The earth is comprised of denser materials such as iron and nickel and other siderophile elements in the core and silicate materials in the mantle. The temperature at the core of the earth is extremely high that generates a force, that allows the molten materials (magma) to rise up from the bottom of the mantle towards the crust, in the form of convection currents. This upward movement of magma forces the lithospheric plates to move.
Thus, magma rises from the bottom of the mantle towards the crust.
what is love made out of ?
Answers
A compound having an approximate molar mass of 165 - 170 g has the following...
A compound having an approximate molar mass of 165 - 170 g has the following percentage composition by mass: carbon, 42.87%; hydrogen, 3.598%; oxygen,
28.55%; nitrogen, 25.00%. Determine the empirical and molecular formulas of
the compound.
Answers
Answer:
Find ratio of atoms for empirical formula, divide mass by atomic mass
C=42.87/12 = 3.57
H= 3.598/1 = 3.598
O= 28.55/16 = 1.784
N= 25.00/14 =1.1785
to see ratio, divide by smallest no
Gives C2H2ON for empirical formula
Empirical mass = 24 +2 +16 + 14 = 56
165 to 170 /56 = 3
so molecular formula = empirical formula x 3= C6H6O3N3
1. The empirical formula of the compound is C₂H₂ON
2. The molecular formula of the compound is C₆H₆O₃N₃
1. Determination of the empirical formula.From the question given above, the following data were obtained:
Carbon (C) = 42.87%
Hydrogen (H) = 3.598%
Oxygen (O) = 28.55%
Nitrogen (N) = 25.00%
Empirical formula =?C = 42.87%
H = 3.598%
O = 28.55%
N = 25.00%
Divide by their molar mass
C = 42.87 / 12 = 3.5725
H = 3.598 / 1 = 3.598
O = 28.55 / 16 = 1.7844
N = 25.00 / 14 = 1.7857
Divide by the smallest
C = 3.5725 / 1.7844 = 2
H = 3.598 / 1.7844 = 2
O = 1.7844 / 1.7844 = 1
N = 1.7857 / 1.7844 = 1
Therefore, the empirical formula of the compound is C₂H₂ON
2. Determination of the molecular formula.Molar mass of compound = (165 + 170)/2
Molar mass of compound = 335/2
Molar mass of compound = 167.5 g/mol
Empirical formula = C₂H₂ON
Molecular formula =?Molecular formula = Empirical formula × n = molar mass of compound
[C₂H₂ON]n = 167.5
[(12×2) + (2×1) + 16 + 14]n = 167.5
[24 + 2 + 16 + 14]n = 167.5
56n = 167.5
Divide both side by 56
n = 167.5 / 56
n = 3
Molecular formula = [C₂H₂ON]n
Molecular formula = [C₂H₂ON]₃
Molecular formula = C₆H₆O₃N₃Therefore, the Molecular formula of the compound is C₆H₆O₃N₃
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which equation is derived from the combined gas law?
Answers
Answer:
The correct answer is V1/T1=V2/T2.
Explanation:
Just took the test
Answer:
Its A on edge :)
Explanation:
Which is the molar mass of BF3?
Answers
67.81 g/mol
Which diagram above has 4 valence electrons?
Answers
Answer:
answer A has four valence electrons
Explanation:
The outer shell has 4 electrons, which are considered the valence electrons
i need to know what occupied vs full means for chemistry
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A reaction balanced when it shows us the_____ number of atoms are present before and after the reaction.
Answers
Answer:
equal
Explanation:
According to the law of conservation of matter, the number of atoms before and after a chemical reaction should be equal, such that no atoms are, under normal circumstances, created or destroyed.
The number placed in front of a compound to balance a chemical reaction is called?
Answers
Answer:
coefficients
Explanation:
good luck
will mark brainliest
Answers
Answer:
D. water
Hope it will help you......According to the text, which amino acid(s) contains a side chain..
a. in which molecules form covalent disulfide bridges with each other?
b. that is hydrophobic?
c. that forms hydrogen bonds?
d. that is basic?
Answers
Answer:
(b) that is hydrophobic
Explanation:
e.g, alanine
Cause, Alanine possess hydrophobic side chain and the most appropriate answer is (d) part......
Alanine is an aliphatic amino acid, because the side-chain connected to the α-carbon atom is a methyl group (-CH3), alanine is the simplest α-amino acid after glycine. The methyl side-chain of alanine is non-reactive and is therefore hardly ever directly involved in protein function..
Hope it will help you☺☺☺☺☺
Answer:
(b) that is hydrophobic
Explanation:
e.g, alanine
Cause, Alanine possess hydrophobic side chain and the most appropriate answer is (d) part......
Alanine is an aliphatic amino acid, because the side-chain connected to the a-carbon atom is a methyl group (-CH3), alanine is the simplest a-amino acid after glycine. The methyl side-chain of alanine is non-reactive and is therefore hardly ever directly involved in protein function...
Hope it helps....