Answer:
The empirical formula is the formula with a minimum whole number ratio of the constituent atoms present in a molecule. While the molecular formula has the actual number of atoms of various elements present in the molecule of the substance.
Empirical formula is C₃H₄O₃
Molecular formula is C₆H₈O₆
This question involves finding the empirical and molecular formulas. Empirical formula is the one where minimum whole number ratio of the constituent atoms present in a molecule is shown whereas molecular formula is the one that shows the number of each type of atom that are present in a molecule.The compound contains only carbon, oxygen and hydrogen and undergoes combustion. Thus;[tex]C_{x}[/tex][tex]H_{y} O_{z}[/tex] + O₂ ⟶ xCO₂ + [tex]\frac{y}{z} H_{2} O[/tex]
The combustion yields 12.81 mg of CO₂.From online sources, molar mass of CO₂ = 44 g/mol
number of moles of CO₂ = 12.81/44 = 0.291m mol
Mass of carbon in it is; C = 12 × 0.291 = 3.492 mg
Similarly the combustion yields 3.50 mg H2O.molar mass of water = 18 g/mol
number of moles of water in it = 3.5/18 = 0.194m mol
Hydrogen has 2 nos in water and so;
number of moles of hydrogen = 2 × 0.194 = 0.388m mol
Mass of hydrogen = 1 × 0.388 = 0.388 mg
Compound is 8.544 mg and so;Oxygen mass = 8.544 - (3.492 + 0.388) = 4.664 mg
Similarly, moles of oxygen that has molar mass of 16 is;
no of moles of oxygen = 4.664/16 = 0.2915m mol
Thus;Ratio of C:H:O is; 0.291:0.388;0.2915
Simplifying this gives us the empirical formula ratio as;
3:4:3
Thus;
Empirical formula is C₃H₄O₃
Molar mass of C₃H₄O₃ = (12 × 3) + (1 × 4) + (16 × 3) = 88 g/molWe are told that the molar mass of the compound is 176.1 g/mol.
Thus;
Molecular formula is; (176.1/88)C₃H₄O₃ = C₆H₈O₆
Read more at; brainly.com/question/14853529
What is the approximate mass of one electron?
Answer:
9.1093837015 × 10^−31 kg
Very small mass
A(n)_________ test only one factor at a time
Answer:
controlled experiment
4. What is a scientific law, and how does it
differ from a theory?
So I had a question which was, What is the charge on a neutron?
A. neutral
Bon positive
C. negative
(Which one of those is right choice?)
Answer:
A. neutral
Explanation:
It's net charge is 0.
Hope it is helpful....Answer:
A. neutral
Explanation:
A neutron is given by formular
[tex]» \: \: {}^{1}_{0}n[/tex]
hence it's net charge is zero
is it correct what I have done
Anss\zyew:yes,the answer is very normal and well done
Cats are aliens send to spy on us. Is the statement printed on this poster about cats scientific theory? Explain your answerr, including whether you can provide evidence to support the statement
Answer:
No, there is no evidence or proof that proves the scientific theory. Therefore, the statement is not a scientific theory.
what is the concentration of hydrogen ion, H+, present in a water sample if 100. ml of the sample requires 7.2 ml of 2.5 x 10 -3 M NaOH to be neutralized
Answer: 1.8x10^-4 M H+
Explanation: The number of moles of NaOH added to the 100 ml soultion will be equal to the number of moles of H+ present in that solution.
Moles NaOH in 7.2 ml of 2.5x10^-3 M NaOH
(2.5x10^-3 M NaOH) is the same as 2.5x10^-3 moles NaOH/liter
(2.5x10^-3 moles NaOH/liter)*(7.2 ml)*(1 liter/1000ml) = 1.8x10^-4 moles NaOH used to titrate 100 ml of the acid. That means there was 1.8x10^-4 moles of H^+ in 100 ml.
Concentration of H^+ = (1.8x10^-4 moles H)/0.100 l) = 1.8x10^-4 M H+
(pH of 3.74)
Element Z has 2 natural isotopes. One isotope has a mass of 15.0 amu and a relative abundance of 30%. The other isotope has a mass of 16.0 amu. What is the second isotope's relative abundance?
Answer:
70%
Explanation:
Just substract 100 % - 30%
FeS + ….HNO3 …….……..+ ….H2SO4 + ….NO + ……….
Answer:
hey it's mistake in the question please check it
Which describes a relationship when calculating the energy of a photon? The energy of the photon is directly proportional to frequency. The energy of the photon is inversely proportional to frequency. As the energy of the photon increases, Planck’s constant increases. As the energy of the photon increases, Planck’s constant decreases.
Answer:
The photon is directly proportional to frquency
Explanation:
E=hf
where E is energy
h is plancks constant and
f is frequency
Answer:
A
Explanation:
Edge 2022
Which of these choices describes a solid substance?
A. The volume of the substance depends on the container its in.
B. Volume of the substance changes depending on its location.
C. The shape of the substance changes often.
D. The shape of the substance is fixed and volume is constant.
19 yards is the same as how many meters?
Hey! There genius is?
Again am here with questions, which is continuou with yesterday question. Topic, Neutralisation!
Could you spare a moment?
I will really appreciate what you have done on this question's answer.
So All Genius Who Answer This, Complete all the questions.
Thanks!!!!! Open your eye to see my question Genius...........
bye!!!! Catch you later.
Answer:
1. A neutralization reaction is when an acid a base react to form water and salt and involves the combination of H+ ions and OH- negative ions to generate water.
2. starchy refined carbohydrates such as chips, bread, pasta, etc
3.a. brush with fluoride toothpaste after eating or drinking
b. rinse your mouth
c. visit your dentist regularly
d. consider dental sealants
e. drink some tap water
f. avoid frequent snacking and sipping
g.eat tooth- healthy foods
h. consider fluoride treatments
I. ask about antibacterial treatments
j.combined treatments
4. Add diary: the fiery chemical in hot chillies, capsaicin, likes to bound itself onto a compound in milk, which neutralises the burn. Add a generous dollop sour cream, creme fraiche, yogurt or even a touch of milk or cream to spicy foods . For best results tho go with full fat diary.
5.a. Gypsum ( calcium sulphate, CaSo4. 2H2O)
b. baking soda or zinc carbonate
c. lithium hydroxide
d. lemon juice and ordinary vinegar
e.distilled white vin6
Is it possible to prove that something is real or true of you can’t directly observe it? If no, why not? If yes, how would you do that?
Answer:
I don't know if you can directly prove it with evidence if you haven't observed it but you can maybe take an educated guess by the aftermath of it?
For example, you see a burnt log. At this time, people don't know what fire is. After we study the log, we could see that it takes extreme temperature in order to burn the log and that would help people see that there is a force like fire that can cause this. In a way, finding out that extreme temperatures burns stuff is another step closer to the discovery and proof of fire
I hope that makes sense
An excess of a divalent metal M was dissolved in a limited volume of hydrocloric acid. If 576cm³ of hydrogen was librated at s.t.p , what was the mass of metal that produced this volume of gydrogen?( M = 24, H = 1 , molar volume of gas at s.t.p = 22.4dm³)
Answer:
14.8 g
Explanation:
step 1 You first have to convert the cm^3 to dm^3 by dividing the volume by 1000 then find the number of mols for Hydrogen gas
from there you can use the of moles for hydrogen to find the moles of the metal step 2
then step 3 you multiply the number of by The Mr or Fr giving you your mass
What is the ability to do work
Answer:
The ability to do work is called energy.
Which of the following are testable?
hypotheses
laws
theories
Answer: all of them
Answer:
all the above
Explanation:
how does bias in the data affect experimental results?
Answer:
Bias can cause the results of a scientific study to be disproportionately weighted in favor of one result or group of subjects. This can cause misunderstandings of natural processes that may make conclusions drawn from the data unreliable.
Explanation:
Could someone plz help me
Answer:
A
Explanation:
B: not B. Opinions don't matter. Facts do.
C: its a consideration. It will limit the scope of the experiment. But it's not relevant to the investigation. Not C
D: You might want to contact some scientists to see what they think about your investigation, but randomly interviewing anyone and everyone is not the answer.
You want to do A for certain.
The more energy a particle has, the
more it will move. Which statement is
true about the energy level of liquids?
A. Liquids have less energy than solids.
B. Liquids have more energy than solids.
C. Liquids have more energy than gases and plasma.
D. Liquids have no energy.
Option B is the answer.
Hope it helps you
Hi,
Answer:
B. Liquids have more energy than solids.
Which is true about atoms?
A. They are always made from other compounds.
B. They are always motionless.
C. They can combine to form other substances.
D. They cannot combine to form other
simbstances.
Answer:
They are always motion less
Explanation:
I hope that is an ok answer for you:)
Let me know if I can help you in any other ways
Lead Melting
a
Chemical Change
b
Physical Change
Answer:
Melting is an example of physical change.
Explanation:
Can someone plz help me? Plzz giving brainliest!
(Plz chose 3 questions)
Answer:
Facts: A D and maybe C I think you are intended to say C
Explanation:
A is certainly not an opinion. It is either true, or it is not. I think it is intended as a fact.
B is an opinion (which I think is true)
C is kind of iffy. It might be true and it might be an opinion. In looking it up, it is factually incorrect. Cats are related to wildcats in the middle east.
D is also iffy. They can just eat disease free rodents. I'd classify it as more opinion than fact.
E. definitely an opinion.
State the period and group to which aluminum belongs to in the periodic table
Explanation:
aluminium belongs to group 13 and period 3
From
its position in the periodic table, determine which atom in each pair is more electronegative:
a. Br or Cl
b. N or O
c. S or O
d. P or S
e. Si or N
f. Ba or P
g. N or K
Answer:
a.cl
b.O
c.O
d.S
e.N
f.p
g.N
Which of the following is NOT. A property of salt in the ionic and covalent properties lab?
Answer:
im thinking Low melting point
because NaCl (salt has mp 801 degC)
and pretty sure water has mp 0 degC
Explanation:
How does chemistry affect sports?
A. Athletes can work out on machines to increase their muscle mass.
B. Data can be collected by à computer to determine a particular
player's strengths.
C. Safety equipment is made of synthetic materials that are
lightweight yet strong.
D. The path of a ball can be predicted using the laws of motion.
Answer:
c
Explanation:
Explain the pH difference between acid and water.
conversions please help me with 6 & 7
6.
7. 6 × 7 = 42
42 ÷ 10 = 4,2 Pizzas
You need to buy 4 or 5 Pizzas.
THIS IS URGENT meant to be due today can someone help out please I’ll brainlist :)!
Hi,
These are the answers
•Question 6. B, Yogurt and sour milk
•Question 7. B, turn litmus paper red
•Question 8. B, used to find pH of a solution
•Question 9. A, names of products and reactants of a chemical reaction in words
•Question 10. B, feel slippery
Hope it help you. Pls mark brainliest if it helped you