Answer:
Chemical energy is stored in the bonds that connect atoms with other atoms and molecules with other molecules
Explanation:
What is the van't hoff factor of C7H7NO?
Answer:
i = 1
Explanation:
Van't Hoff factor (i) is explained as the number of ions dissolved in solution.
It is needed to determine colligative properties which depend on the amount of solute.
C₇H₇NO is an organic compound → benzamide
All the organic compound have 1, as Van't Hoff factor.
In order to predict i, you consider ionic salts. For example:
AlCl₃
CaCl₂
NH₄NO₃
When you dissociate them, you determine i:
AlCl₃ → Al³⁺ + 3Cl⁻ i =4
CaCl₂ → Ca²⁺ + 2Cl⁻ i = 3
NH₄NO₃ → NH₄⁺ + NO₃⁻ i =2
The van't Hoff's factor of C₇H₇NO is 1
Van't Hoff factorThe Van't Hoff factor denoted with the symbol i is the number of ions dissolved in solution.
Non electrolyte (such as organic compounds) generally have van't Hoff's factor as 1The Van't Hoff's factor for ionic compounds varies with the number of ions in the solution. How to determine the Van't Hoff's factor for C₇H₇NOC₇H₇NO (benzamide) is an organic compound and as such, it have a Van't Hoff's factor of 1
Learn more about Van't Hoff's factor:
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How many grams are in 1.3 moles of Cr?
Answer:
40.38 grams
Explanation:
sound travels slower in colder air than it does in warmer air why does the speed of sound depend on air temperature
Answer:
Explanation:
The speed of sound in the air mainly depends on temperature. At high altitudes, where it is much colder, sound travels slower. The higher the temperature, the faster the air molecules are moving to begin with, and the quicker they bump into each other as a sound wave passes through.
Answer:
Air molecules have more energy at higher temperature which means they vibrate faster
Calculate the number of oxygen atoms present in a 58.6 mL sample of gaseous nitrogen dioxide at standard temperature and pressure.
Answer:
Ur missing info
Explanation:
5.Explain how to convert the mass of a substance into mole
Answer:
............................................
how many moles of MgO can be made from 10 moles of fe2O3?
Answer:
Fe 2 O3 .
Explanation:
Consider the reaction Mg₂Si(s) + 4 H₂O(ℓ) → 2 Mg(OH)₂(aq) + SiH₄(g). How many grams of silane gas (SiH₄) are formed if 25.0 g of Mg₂Si reacts with excess H₂O?
Answer:
10.60 grams of silane gas are formed.
Explanation:
From the reaction:
Mg₂Si(s) + 4H₂O(l) → 2Mg(OH)₂(aq) + SiH₄(g)
We know that the limiting reactant is Mg₂Si, so to find the mass of SiH₄ formed we need to calculate the number of moles of Mg₂Si:
[tex]\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}}[/tex]
Where:
m: is the mass of Mg₂Si = 25.0 g
M: is the molar mass of Mg₂Si = 76.69 g/mol
[tex]\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}} = \frac{25.0 g}{76.69 g/mol} = 0.33 moles[/tex]
Now, the stoichiometric relation between Mg₂Si and SiH₄ is 1:1 so:
[tex] \eta_{Mg_{2}Si} = \eta_{SiH_{4}} = 0.33 moles [/tex]
Finally, the mass of SiH₄ is:
[tex] m_{SiH_{4}} = \eta_{SiH_{4}}*M_{SiH_{4}} = 0.33 moles*32.12 g/mol = 10.60 g [/tex]
Therefore, 10.60 grams of silane gas are formed.
I hope it helps you!
What are chemical formulaes?
give your own response!!
Answer:
is a way of presenting information about the chemical proportions of atoms
Explanation:
Compared to solids and liquids, gases are easily compressed. The best explanation for this fact is that the molecules in a gas
a.
are in constant motion
b.
are relatively far apart
C.
have a real, nonzero volume
d.
move slower as temperature decreases
———I’m in my final exam please help———
Answer:
The kinetic-molecular theory explains why gases are more compressible than either liquids or solids. Gases are compressible because most of the volume of a gas is composed of the large amounts of empty space between the gas particles. Compressed gases are used in many situations.
Explanation:
HELP PLEASE || TEN PTS WILL MARK BRAINLEST ||Reaction B could produce a substance with a pH of...
Group of answer choices
4.
14.
10.
7.
Answer:
the answer is 4
Explanation:
i took the test and got it right and i would recommend using quizlet it has these flash cards and the answers are there you just click on the one that says your question and it will say your answer on the back. It helps with most of my test! Hope this helps (:
What is the relationship between melting/boiling point and intermolecular forces
Which is the most important part of the food web? Producers, decomposers, carnivores, or herbivores
Answer:
All parts of the food chain are very important for if one is part of the food chain is tooken away than other parts of the food chain will be affected.
Explanation:
Answer:
all is important
Explanation:
What is the molarity of NaOH if 300.mL of
5.00M HCl is titrated with 200.mL of NaOH?
I need help someone plz
Answer:It has 8grams of hydrgen
Explanation:
Please! I need this quick! THANK YOU!!
Answer:
Force
Explanation:
The force is applied to either pushing or pulling forwarding momentum and movement.
Answer:
A: Force
It is a push/pull that changes the motion of an object
How is a compound different from a mixture?
A. Mixtures are created through physical changes; compounds are created through chemical reactions.
B. Compounds are created through physical changes; mixtures are created through chemical reactions.
C. Mixtures, on average, are heavier than compounds.
D. Compounds, on average, are heavier than mixtures.
HELPPPPPP!!
Protons are a subatomic particle. Which description below accurately describes a proton's charge, location, and mass?
a) A proton is in the nucleus, has no charge, and atomic mass of 1 amu.
b) A proton is outside the nucleus, has a negative charge, and is so small it doesn't contribute to the mass.
c) A proton is in the nucleus, has a positive charge, and an atomic mass of 1 amu.
d) A proton is outside the nucleus, has a positive charge, and is so small it doesn't contribute to the mass.
Answer: C) a proton is in the nucleus, has a positive charge, and an atomic mass of 1 amu.
Explanation:
Protons are positive so they give a positive charge, they are also never outside of the nucleus. Only electrons are outside the nucleus.
Answer ASAP Homework
Answer:
1.98 ×10^2 g
Explanation:
follow the method in the above image
When a coil of wire is connected to a battery, an electric current flows through it.
True
false
Need quick! Please help rn! THANK YOU!
Answer:
B. Unbalanced force
Explanation:
Answer:
I think its unbalanced force
Explanation:
crazy what a quick go.ogle search can do! :)
How do movement of rocks cause earthquakes?
Answer:
Well its actually the movement of tectonic plates under the earths surface that when the slide along each other, pull away from each other, or push up against each other they create earth quakes.
Explanation: yes.
Arrange these Alkaline Earth metals from lowest to highest electronegativity: Ca, Be, Ba, Sr
Ca is -2
Be is stabilized
Ba is -4
Sr is -3
so it would be => Ba, Sr, Ca, Be
have a wonderful day! :)
The arrangement of the alkaline earth metals from the lowest to highest electronegativity is; Ba< Sr< Ca<Be
Electronegativity refers to the ability of the atoms of an element in a compound to attract the shared electrons of that bond towards itself. It is a property that decreases down the group but increases across the period.
Electronegativity increases across the period as atoms of elements become smaller in size and decreases down the group because of increase in distance between the valence electrons and nucleus.
Since electronegativity decreases down the group, the order of electronegativity from lowest to highest is; Ba< Sr< Ca<Be
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Difference girteen tungsten and nichrome
Answer:Tungsten is made of tungsten while Nichrome is made of nickel chromium. ... Tungsten is used to make filament of bulbs. Nichrome have high resistivity than tungsten.
Explanation:i hope u have a wonderful night and stay safe
why the iron nail not rusted on a chemical to absorb water vapour
Answer:
Thus there was no accumulation of ions on the nails, as the dissolved gases were already removed, hence no rust formation. In test tube C, a chemical was added to absorb the water vapour. We know that rust formation takes place when a metal is exposed to water vapour.
Explanation:i hope u have a wonderful night and stays safe
Which diagram shows two waves with different amplitudes and the same wavelengths?
Answer: a
Explanation:
im big brain
The diagram that shows two (2) waveforms with different amplitudes but the same wavelengths is: Diagram A.
A wave can be defined as a disturbance that is created in a medium, which progressively transports energy from a source to another location without the transportation of matter. Some of the parameters that are associated with a waveform include the following:
SpeedCrestFrequencyWavelengthAmplitudeAmplitude refers to the maximum displacement of a wave when measured from its equilibrium position.
In the attached diagram, the amplitudes are 1 meter and 0.5 meter.Wavelength refers to the distance between two (2) successive crests (troughs) of a wave.
In the attached diagram, the wavelengths are 2 meters respectively.Note: Amplitude is measured vertically from an equilibrium position while wavelength is measured horizontally.
In conclusion, Diagram A shows two (2) waveforms with different amplitudes but the same wavelengths.
Find more information on wave here: https://brainly.com/question/23460034
What happens to electrons in an ionic bond?
Answer:
the metal loses electrons to become a positively charged cation
Explanation:
NEED HELP!!! pls help mee :)
Which organelle in cytoplasm is responsible for carrying hereditary information?
Answer:
Nucleus
Explanation:
The nucleus serves as the cells command center, sending direction to the cell to grow, mature, divide, or die
(HELP ASAP) what is the reaction for Si + S₈ --> Si₂S₄
Answer:
Synthesis reaction~~~~~~~
Explanation:
Two or more substances combined but not chemically, are called what?
Answer:
a mixture
Explanation:
Two or more substances combined chemically, are called a compound