Answer: Proteins are known as biomolecules and biomolecules are made of the elements Carbon, Hydrogen, Nitrogen, and Oxygen and the monomers of proteins are known as amino acids.
One litre of hydrogen at STP weight 0.09gm of 2 litre of gas at STP weight 2.880gm. Calculate the vapour density and molecular weight of gas.
Answer:
we know, at STP ( standard temperature and pressure).
we know, volume of 1 mole of gas = 22.4L
weight of 1 Litre of hydrogen gas = 0.09g
so, weight of 22.4 litres of hydrogen gas = 22.4 × 0.09 = 2.016g ≈ 2g = molecular weight of hydrogen gas.
similarly,
weight of 2L of a gas = 2.88gm
so, weight of 22.4 L of the gas = 2.88 × 22.4/2 = 2.88 × 11.2 = 32.256g
hence, molecular weight of the gas = 32.256g
vapor density = molecular weight/2
= 32.256/2 = 16.128g
hence, vapor density of the gas is 16.128g.
Explanation:
How do you determine if you have a covalent bond?
Answer:
If the electronegativity difference (usually called ΔEN) is less than 0.5, then the bond is nonpolar covalent. If the ΔEN is between 0.5 and 1.6, the bond is considered polar covalent. If the ΔEN is greater than 2.0, then the bond is ionic.
Explanation:
Hope this helped :)
PLEASE HELP ASAP I EILL GIVE 100 POINTS!!! Kristy is on the track team. She runs the one kilometer race by going four times around the circular track. How does Kristy velocity change.
A. Her velocity changes countinually since her direction constantly changes
B. Her velocity depends on only on how she paces herself during the race
C. Her velocity is the same as her speed
D. Her speed changes at the same rate as velocity
Answer:A
Explanation:
Which of the following is TRUE about when two atoms form a bond? a. Repulsion is greater than attraction b. Neither atoms will have a full valence shell c. Potential energy is at a minimum
Answer:
b: Neither atoms will have a full valence shell
Explanation:
I think sooo
Which process creates new cells from existing cells?
A. Cell division
B.Cell limitation
C.Cell addition
D.No answer text provided.
Answer:
the answer is cell division
Explanation:
cell division is the process by which a present cell divides into two or more daughter cells.
the process can also be called cell cycle
HELP ME PLEASEEEEEEEEEEEEEEE
(I really dont know the subject i just know science)
Answer:
B
Explanation:
weight , w= mg where m is the mass of the object (unit is kg ) and g is the gravitational force acting on the object ( unit is m/s^2 )
hope it helps
The formula for one molecule of sucrose is shown below.
C12H22011
How many atoms in all are in one molecule of sucrose?
Answer:
45
Explanation:
There are 12 Carbons
There are 22 Hydrogens
There are 11 Oxygens.
I think the answer is either 0 or 45. But the wording is very sloppy. It is not really atoms that are present. There are ions.
Go with 45 but hold your nose when writing your answer.
Which describes how rubbing fur on a rubber rod makes the rod negatively charged. Select one: A. Electrons move from the fur to the rubber rod. B. Electrons move from the rubber rod to the fur. C. Protons move from the rubber rod to the fur.
Answer:
A
Explanation:
Rubbing fur on a rubber rod results in the rod becoming negatively charged as a result of the movement of electrons from the fur to the rubber rod.
The process is called triboelectric charging. When the two substances are rubbed together, their atoms come into close proximity with each other and their electron clouds interact with the fur losing electrons to the rubber due to the fact that the atoms of the rubber have higher affinities for electrons than the atoms of the fur. Hence, the fur becomes positively charged while the rubber becomes negatively charged.
A sample of which element could have a volume of 1.5 cubic centimeters (cm3) and a mass of 7.5 grams (g)?
Answer:
5 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{7.5}{1.5} \\ [/tex]
We have the final answer as
5 g/cm³Hope this helps you
when an atom loses electrons, what does it become?
What can you infer about particle's size?
Answer:
particle size analysis, particle size measurement, or simply particle sizing is the collective name of the technical procedures, or laboratory techniques which determines the size range, and/or the average, or mean size of the particles in a powder or liquid sample.
Explanation:
is aluminum Pure or Impure?
Answer:
The aluminium is impure
Which statement describes how chemical formulas, such as H2O, represent compounds?
They show the types of molecules that make up an atom.
They show the elements that make up a compound.
They show the three-dimensional shape of a molecule.
They show the types of bonds that exist between elements.
Answer: B. They show the elements that make up a compound
Explanation:
Answer:
B
Explanation:
Which of the following best describes the Valence Shell Electron Pair Repulsion Theory (VSEPR)?
Answer:
Electron pairs are arranged as far apart from each other as possible.
Explanation:
Like charges repel therefore, VSEPR theory is the "...repulsions between electron pairs present in the valence shell of the central atom."
calculate the weight of 5 atoms of Mg.
Answer:
2.0179701e-22
Explanation:
Critical thinking : Place an unmagnetized piece of iron in a magnetic field (eg iron filings near a magnet). Why is it attracted to the magnet?
Magnets attract iron due to the influence of their magnetic field upon the iron. Before a piece of iron enters the magnet, the polarization of the irons atoms is random. When exposed to the magnetic field, the atoms begin to align their electrons with the flow of the magnetic field, which makes the iron magnetized as well. This, in turn, creates an attraction between the two magnetized objects. This is why a piece of iron that is exposed to a magnet becomes magnetic for some time afterward.
Use the decoder to get the lock combination
Answer:
u didnt attach an image or anything so this is quite confusing.
Explanation:
??
Answer:
Okay
Explanation:
Which of the following is an extensive property of a sample of aluminum?
Answer:
Entropy,mass and volume.... I think
Mass is the extensive property of a sample of aluminum. Therefore, option (A) is correct.
What is the extensive property of matter?The extensive property can be described as a physical property of matter that changes with a change in the size and shape of the matter. Therefore, the extensive property of any substance varies directly with the mass.
Extensive properties are the value of the property of the system that must be equal to the sum of the values of different parts of the system. These properties depend on the amount of matter contained in the system.
Examples of Extensive properties are temperature, pressure, density, boiling point, etc. The ratio of the two extensive properties is an intensive property such as density.
The mass of a sample of aluminum is an example of extensive property as it depends on the amount of aluminum in the given sample. This property of the sample is proportional to the size of the system.
Learn more about the extensive property, here:
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Your question is incomplete, most probably the complete question was,
Which of the following is an extensive property of a sample of aluminum?
A) Mass
B) Temperature
C) Pressure
D) Density
what is hard water and what causes hardness of water
Answer:
hard water is ice
Explanation:
ice is formed as the water temperature decreases and then it freezes
The #2 discovery was:
a
heliocentrism
0
E=MCP
c
heredity
general relativity
d
Answer:
bug vfyjovcduvcu Harris's
Susie cooked sausages on a barbecue. Fat and water in the sausages changed state. which two changes of state occur during this process? a. Fat melted b. Water evaporated
Answer:
The options a and b are correct
Explanation:
This options provided to the question are the answers to the question. But for clarification. When the fat melts, the change of state that occurs here is from solid to liquid (which is called melting) while the change of state that occurs when the water evaporated is from liquid to gas (which is called evaporation).
method used to separate ethanol from propanol
what would happen if the
attractive forces between all of the particles
of matter on Earth were equal?
The magnitude of attractive forces between particles that compose matter determine the state of matter. Hence, if all particles of matter on earth have equal attractive forces, only a single state of matter (solid, liquid or gas) will exist on earth.
Matter exists in three states;
SolidLiquidGasIn solids, there exists the greatest magnitude of attractive forces between particles.
There are weaker inter-molecular attractive forces between liquid particles. However, inter molecular attractive forces are almost non-existent in gases.
The reason for the existence of different states of matter on earth is difference in magnitude of inter molecular attractive forces in each state of matter.
If all particles of matter possess equal attractive forces, only one state of matter will be found on earth; either solid, liquid or gas.
Learn more; https://brainly.com/question/9007693
how can animal fossils help us understand the earth
Answer:
Some animals and plant are only known to us as fossils. hope this helps. and have a nice day:)
The independent variable and dependent and constant
Answer:
Explanation:
independent-longer wire
dependent-bulbs being brighter
constants-lamp brand and so on
Which element is a metal? A. K
B. Kr
C. F
D. He
please help, if you’re right i’ll give brainliest and 35 more points
Answer: A
Explanation: Potassium is a metal.
does formaldehyde classified as a pure substance or a mixture
Answer:
pure substance
Explanation:
it is a naturally occuring compound
Answer:
Formaldehyde is a mixed substance. It is made up of Carbon, 2 Hydrogen, and an Oxygen.
Explanation:
The formula is CH2O
Would it be possible for electrons in the 2p orbitals to be inside the 2s orbital?
(Please explain)
Answer:
Yes
Explanation:
You can have 2s and have part of the 2p of the row in the p section.
What is the formula for nitrogen monoxide?
O N203
O NO
O N₂O,
O None of the answers are correct
Which of the following most completely describes a redox reaction?
O A. A chemical decomposition reaction
B. A hydrocarbon combustion reaction
O c. A reaction resulting in electron sharing
D. An oxidation and reduction reaction
Answer:
D.
Explanation:
Because i just copied the person above tbh, and i also got it right in the quiz
To solve such this we must know the concept of redox reaction. Therefore, the correct option is option D that is an oxidation and reduction reaction.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Redox reaction is a chemical reaction where oxidation and reduction takes place simultaneously. Oxidation is loss of electrons and reduction is gain of electrons. The electron transfer from oxidant to reductant.
Therefore, the correct option is option D that is an oxidation and reduction reaction.
Learn more about the chemical reactions, here:
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