Pleas answer ASAP!! If the empirical formula of an organic compound is CH2O then the molecular mass of the compound could be? 15 grams 45 grams 60 grams 135 grams
Answer:
uhh 60??
Explanation:
The molecular mass of the compound could be 60g, the correct option is option c among all the given options.
What is molecular mass?The weight of a molecule is measured by its molecular mass. Atomic weight is another name for it. It usually involves multiplying the total mass of all the atoms in the molecule by the overall number of the element's atoms.
For instance, there are two hydrogen atoms and one oxygen atom in water. The atomic weight of oxygen multiplied by two or more to get the typical hydrogen atomic mass gives the water molecule its mass. The atoms that make up the molecule are what determine an element's molecular mass.
Empirical formula is CH[tex]_2[/tex]O
Mass of Empirical formula =12+12+16=30g
Vapour density = Molar mass of compound/2
30= Molar mass/2
Molar mass of compound =60g
Therefore, the molecular mass of the compound could be 60g, the correct option is option c among all the given options.
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how many moles of each atom in the formula HClO3
Answer:
H has one mole
Cl has one mole
O has three mole
Explanation:
There is a single Hydrogen, thus there is one mole, this also applies to Cl.
With Oxygen, there are three O's, thus there are three moles of Oxygen.
There are 1 mole of H, 1 mole of Cl, and 3 moles of O.
Number of moles in molecules
The number of moles of an atom present in a molecule is classified as the number located in the lower right corner of that atom in the molecule, for example, in the water molecule below:
[tex]H_2O[/tex]
you have 2 moles of hydrogen and 1 mole of oxygen.
Thus, in the HClO3 molecule, there are 1 mol of hydrogen, 1 mol of chlorine and 3 mol of oxygen.
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Splitting of a signal in a proton NMR spectrum tells us the number of chemically non-equivalent hydrogens in the immediate vicinity of the hydrogen giving the signal.
a. True
b. False
Answer:
True
Explanation:
In a given molecule protons in the same chemical environment absorb at the same applied field strength; whereas protons with different chemical environments absorb at different applied field strengths.
A set of protons in the same chemical environment are said to be equivalent. Hence, the number of signals in the NMR spectrum tell us the number of sets of equivalent protons present in the molecule.
Splitting of a signal in a proton NMR spectrum tells us the number of chemically non-equivalent hydrogens in the immediate vicinity of the hydrogen giving the signal.
HELP! WILL GIVE BRAINLIEST DUE SOON
Dome Mountains are formed when:
A: plateaus are eroded away
B: faults rub against each other
C: magma escapes from the crust
D: magma pushes up sedimentary rock
Answer:
I am not the best to answer this but I think it would be B
Explanation:
Pls help I’ll mark brainliest
Answer: I will answer if u Mark me
Explanation:
Why is classification important?
(Al = 27.0 g, O = 16.0 g, H = 1.0 g)
2 Al(OH)3 Al2O3 + 3 H2O
how many grams are produced from .85 moles of AI(OH)3
Answer:
Explanation:
21
Fall is usually a little warmer than spring. And yet, the Sun's path is the same in both seasons. Select all that apply.PLEASE ANSWER CORRECTLY I WILL GIVE BRAINLIEST!-THIS IS SCIENCE
How does photosynthesis affect food chains and food webs?
Answer:
Throughout the clarification section, the description of the situation is summarized.
Explanation:
Plant species mostly with such as photosynthesis have been providing us with just the very first food processing commodity.
They are always the component of the environment, the meals they consume, our clothing, and sometimes even our appliances, and plenty of other components or consumables. Seedlings often extract the greenhouse effect from either the environment, offer additional shelter for far too many species._NaF + _Br2 →_NaBr + _F2
Answer:
2NaF + 1Br2 -> 2NaBr + 1F2
Explanation:
2NaF + 1Br2 -> 2NaBr + 1F2
I simply looked at both the left side and right side and saw there was only 1 F on the left side while there were 2 on the right side.
This means we have to make the left side have 2 F by multiplying NaF by 2.
However, this means there are now 2 Na as well. Going back to the right side, I multiplied NaBr by 2 so that there are 2 Na on both sides.
Now there are 2 Br on the right side. Checking back to the left side, there are also 2 Br, meaning this equation is now balanced.
Under identical conditions, separate samples of O2 and an unknown gas were allowed to effuse through identical membranes simultaneously. After a certain amount of time, it was found that 7.88 mL of O2 had passed through the membrane, but only 3.69 mL of of the unknown gas had passed through. What is the molar mass of the unknown gas
Answer:
146.5g/mol
Explanation:
The volume of gas effused is directly proportional to the square root of its relative molecular mass.
Let the volume of oxygen gas be V1
Let the volume of the unknown gas be V2
Let the molar mass of oxygen be M1
Let the molar mass of the unknown gas be M2
V1/V2 =√M2/M1
7.88/3.69 = √M2/32
2.14 = √M2/32
(2.14)^2 = M2/32
4.58 = M2/32
M2 = 32*4.58
M2 = 146.5g/mol
Amy set up the following experiment to study how plant growth is influenced by weather conditions. mc052-1 One pot will model normal growing conditions, and the other will model drought conditions. Which of the following factors is it most important for Amy to change to model drought conditions?
Answer:
lack of sunlight, overcrowded region for shelter of the plants, no nutrients and water supply, etc.
Explanation:
The plants needs favorable climatic conditions and nutrient to grow. Plants need air, sunlight, water, proper temperature, nutrients, etc. grow and make their food. They make their food with the help of sunlight and carbon dioxide by a process called as photosynthesis.
Now in the context, Amy is setting up an experiment where she will study the growth of plants in two models. One in the normal growing conditions and the other in a drought condition.
Drought is considered the most important abiotic factor that limits the growth and adversely affects the growth and the crop. The factor that is important for Amy to change the model into a drought conditions is the lack of water and carbon dioxide in the atmosphere. Also scarcity of sunlight and nutrients. The drought stress is considered as one of the crop performance limiting factors.
what happens to ammonia when reacts with heated sodium?
Answer:
When dry ammonia is passed over heated sodium in absence of air, the product formed is sodium amide. - When dry ammonia is passed over heated sodium in absence of air, sodium amide is produced. - Sodium amide aka sodamide is mainly used as a strong base in organic chemistry.
Explanation:
Which element easily loses one electron to form a positive ion? (AKS 1c/DOK 1)
A.
Nitrogen (N)
B.
Bromine (Br)
C.
Potassium (K)
D.
Magnesium (Mg)
Answer:
Potassium
Explanation:
It's in group 1 in the periodic table of elements
Why is the combined gas law the most practiced gas law
PLEASE HELP ME
How many grams of lithium are needed to produce 45 Og of lithium nitride, according to the following process? 6 Li(s) + N2(g) → 2 Li3N(s)
Consider the sodium borohydride reduction of camphor to isoborneol. A reaction was performed in which 1.600 g of camphor was reduced by an excess of sodium borohydride to make 1.062 g of isoborneol. Calculate the theoretical yield and percent yield for this reaction. Theoretical yield: g Percent yield:
Answer:
62.5%
Explanation:
Number of moles of camphor reacted= 1.6g/152.23 g/mol = 0.011 moles
Since the reaction is 1:1, then 0.011 moles of isoborenol is also produced.
Theoretical yield of isoborenol produced = 154.25 g/mol * 0.011 moles = 1.698 g
% yield = actual yield/theoretical yield * 100
% yield = 1.062 g/1.698 g * 100
% yield = 62.5%
Which are characteristics of electromagnetic waves? Check all that apply.
travel in straight lines and can bounce off surfaces
travel through space at the speed of light
travel only through matter
travel only through space
can bend around objects
move by particles bumping into each other
move by the interaction between an electric field and a magnetic field
The characteristics of electromagnetic waves are that they travel in straight lines and can bounce off surfaces,travel through space at speed of light,can bend around objects,move by interaction between electric field and magnetic field.
What are electromagnetic waves?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
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Chlorine reacts with sodium and with hydrogen.
Compare the structure and bonding in sodium chloride and hydrogen chloride.
Answer:
Sodium Chloride has Ionic bond while Hydrogen Chloride has covalent bond.
Explanation:
Na has 11 electrons (2, 8, 1) and need to give away 1 electron to be stable
Cl has 17 electrons ( 2, 8, 7) and needs 1 electron to be stable.
Na transfers 1 electron to CL to form Ionic bond.
While
Hydrogen has 1 electron and shares with Chlorine to be stable.
Covalent bond involves sharing.
Chlorine reacts with sodium to form ionic sodium chloride while chlorine reacts with hydrogen to form covalent hydrogen chloride.
The nature of bonding between atoms depends on their relative difference in electronegativity.
Chemical bonding is the process by which atoms come together to form compounds.
There are different kinds of chemical bonds;
Ionic or electrovalent bondCovalent bondMetallic bondAn ionic bond is formed when there is high electronegativity difference between the bonding atoms. Typically, this type of bond is formed when the electronegativity difference is about 2.0 and above.
For a covalent bond, an electronegativity difference of about 0.4 - 1.7 is considered a polar covalent bond. Lower values of electronegativity difference corresponds to a nonpolar bond.
The electronegativity difference between sodium and chlorine is about 2.23. This corresponds to a pure ionic bond. The compound is composed of chlorine and sodium ion pairs alternately located in a crystal lattice as shown in the image attached.
The electronegativity difference between chlorine and hydrogen is about 0.96. This corresponds to a polar covalent bond. The negative end of the dipole points towards chlorine while the positive end of the dipole points towards hydrogen.
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What is always true of a strong acid?
A. It does not dissociate at all in solution.
B. It has not been diluted with water.
C. It has more than one hydrogen atom.
D. It dissociates completely in solution.
Considering the definition of strong acid, it dissociates completely in solution (option D) is always true of a strong acid.
Definition of strong acidAn acid that completely dissociates in solution at constant temperature and pressure is called a strong acid.
In other words, strong acids are completely ionized, that is, in the ionization process they are completely transformed into cations or positive ions and anions or negative ions.
Strong acids are characterized by being very corrosive and have the ability to conduct electrical energy efficiently.
Examples of strong acids are hydrochloric acid (HCI) and hydrobromic acid (HBr).
SummaryIt dissociates completely in solution (option D) is always true of a strong acid.
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Which word best describes gamma rays?
A)Weak
B)Destructive
C)Visible
D)Harmless
Answer:
Explanation:
Destructive :D
According to the position of gamma rays in electromagnetic spectrum,the word which best describes gamma rays is destructive as they have high energy.
What is electromagnetic spectrum?The electromagnetic spectrum consists of electromagnetic radiation which consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
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S plus 11r minus fifteen
Answer:
s+11r-15
Explanation:
A fifth-grade science class puts half of a white tablet in a test tube with 10 milliliters (mL) of water at 21°C (70°F). The tablet bubbles rapidly for three minutes until it is gone. Students record the final temperature at 20°C (68°F). Which choice best identifies evidence that a chemical reaction occurred?
Answer:
i think it table broke in half
Explanation:
Answer: it would be change in water temperature
Explanation: because the change in the water is the temperature and its is
evaporation
The octane rating of gasoline is a relationship of the burning efficiency of the given gasoline mixture to the burning efficiency of octane (C8H18). Like most hydrocarbons, octane reacts with oxygen gas to produce carbon dioxide and water. The unbalanced equation for this reaction is
Answer:
C₈H₁₈(l) + O₂(g) ⇒ CO₂(g) + H₂O(l)
Explanation:
Let's consider the unbalanced equation for the combustion reaction of octane.
C₈H₁₈(l) + O₂(g) ⇒ CO₂(g) + H₂O(l)
We can begin balancing H atoms by multiplying H₂O by 9, and C atoms by multiplying CO₂ by 8.
C₈H₁₈(l) + O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(l)
Finally, we get the balanced equation by multiplying O₂ by 12.5.
C₈H₁₈(l) + 12.5 O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(l)
Answer:
The coefficents will be 2, 25 --> 16, 18
Explanation:
What will happen to bring the substance from a solid to a gas?
The substance will lose pressure.
Energy will be added.
Energy will be taken away.
The substance will lose volume.
Answer:
B) Energy will be added
Explanation:
I just took the test...
Can someone help me please on this question like quick?
The electron configuration for Zn2 is [Ar] 3d10 and NOT [Ar] 4s23d8. What experimental evidence has been collected that would allow one to conclude that the [Ar]3d10 is correct
Answer:
Zn2+ is colourless
Explanation:
We know that transition metal salts are usually coloured due to the possibility of d-d transition.
This d-d transition can only occur when there are vacant d-orbitals. The electronic configuration [Ar] 4s23d8 suggests the presence of vacant d-orbitals and the possibility of the compounds of Zn2+ being coloured.
However, the absence of colours in Zn2+ compounds shows that there is no d-d transition(electronic) spectra observed for Zn2+ because the d orbitals are completely filled. This means that the correct electronic configuration of the ion is [Ar] 3d10.
correct name for PtO.
Answer:
It may stand for 'Paid Time Off'
Explanation:
I need more context but that's probably it.
Answer:
gracias
Explanation:
Plz help mee
Sandy soil
A) holds water well
B) contains clay and humus
C) has loose grains and few nutrients
A
think of this way: in Florida and many other costal places, people have sand in their backyards to limit flooding and things due to being so close to the ocean.
The surface area of a star can be estimated based on the stars