how do you use subscripts and coefficients to determine the number of atoms in a molecule.

Answers

Answer 1

Answer:

To find out the number of atoms: MULTIPLY all the SUBSCRIPTS in the molecule by the COEFFICIENT. (This will give you the number of atoms of each element.)

Explanation:


Related Questions

Find the concentration of a sample of chlorous acid if 35.5 mL
of 0.120 M NaOH is needed to titrate 10.0 mL of the acid.
M

Answers

Answer: 71

Explanation:the is not correcy

Answer: 0.426

I don’t know how to explain

9)
How many grams are in 4.5 moles of sodium hydroxide (NaOH)?

Answers

There is 40 grams in one mole so there is 179.986 or if u round up 180

Answer:

179.986995

Explanation:

1 mole is equal to 39.99711 grams.

so muitiply 39.99711 by 4.5 and get 179.986995

molecular formula of CH2O, 120 g/mol

Answers

The given empirical form aula of compound is CH20

The given molar mass of a compound of 120g/ml

Molar mass of empirical formula
CH20=30g/ml

n= molar mass/ molar mass of empirical formula substitute as follows: n= 120g/ml/30g/ml

n= 4 so, 4 x CH20= C4H8O4

Therefore, the molecular formula of a compound is determined to be C4H8O4

According to the law of conservation of matter, the number of_______is not changed by a chemical reaction
A. Molecules
B. bonds
C. products
D. atoms

Answers

Answer:

Atoms

Explanation:

According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.

which would have higher entropy? solid ice, liquid water at 30C, liquid water at 60C, Water vapor

Answers

Answer:

liquid water

Explanation:

becouse liquid water is 30C

Answer:

one: b

two: b

three: a

four: b

Explanation:

What name describes the top-level aquifer?
A. easy aquifer
B. well of water
C. perched water table
D. top-level water table

Answers

Answer:

A

Explanation:

because the rain go down in the earth

Balance the following skeletal equation:
Li(s) + H2O(1) -------> -------> LiOH(aq) + H2(g).

Answers

Answer:

I think above answer is fully correct. Mark it brainliest

Please help me with this homework

Answers

Answer is gas for sure and I think it’s ice for question 2

If you react 59.54 g of S and 78 g of HNO3, how many grams of NO2 can you
theoretically produce?
S + 6 HNO3 + H2SO4 + 6 NO2 + 2 H2O

Answers

Answer:

56.94759 grams of NO2

Explanation:

Stoichiometric Equation:

1 S + 6 HNO3 → 1 H2SO4 + 6 NO2 + 2 H2O.

This is so you can create ratios between each compound in the reaction, and identify the limiting and excess reactants to determine exactly how much can be produced?

The coefficients or molecular quantity of each compound in the balanced equation represents the amount of moles.

To figure out how much can be produced, you have to convert 59.54 g of S into moles of S and 78 g of HNO3 into moles of HNO3.

A reference such as a periodic table can be very helpful as it has the atomic mass of each element which is the mass with respect to 1 mol of that element.

The reaction of perchloric acid (HClO4) with lithium hydroxide (LiOH) is described by the equation: HClO4 + LiOH → LiClO4 + H2O Suppose 100 mL of perchloric acid is neutralized by exactly 46.9 mL of 0.75 M lithium hydroxide. What is the concentration of the perchloric acid?

Answers

Answer:

[HClO₄] = 0.35 M

Explanation:

Neutralization reaction is:

HClO₄ + LiOH  →  LiClO₄  +  H₂O

In this case, we have a titration between a weak acid and a strong base.

In chemistry it is also called an acid base equilibrium.

HClO₄  +  H₂O  ⇄  ClO₄⁻   +  H₃O⁺       Ka

The weak acid is firstly neutralized by the strong base, in order to have a buffer solution before the equivalence point.

When we reach the equivalence point, mmoles of acid = mmoles of base and there is a formula to determine it so:

M acid . Volume of acid = M base . Volume of base

M acid . 100 mL = 0.75 M . 46.9 mL

M acid = (0.75 M . 46.9 mL) / 100 mL → 0.35 M

Define what coal is, explain how it forms, and what it is
used for today

Answers

Answer:

the main use of coal in the United States is to generate electricity.

Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons

Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.

Calculate the mass (in grams) of 3.01x1021 atoms of cobalt (Co).

Answers

the answer i got is 2.95 g Co

The following are properties of metals except:
1
Conducts electricity
2
Gas at room temperature
3
High lustre
4
Ductile

Answers

2 because metals are solid at room temperature

Answer:

Except 2- gas at room temperature

Explanation:

need help i will give you thanks:)

Answers

Answer:

Precipitation

Explanation:

Precipitation is when water falls from the clouds back to earth as rain, snow, or hail. The water returns to the rivers to continue the water cycle. So, the answer is D, precipitation.

I hope this helps :)

Answer:

Vapor Information

Explanation:

Atmospheric rivers are relatively long, narrow regions in the atmosphere like rivers in the sky that transport most of the water vapor outside of the tropics. Not all atmospheric rivers cause damage, and most are weak systems that often provide beneficial rain or snow that is crucial to the water supply.

(You're welcome and have a nice day/night Ma'am/Sir.)

N sub 2 +3H sub 2 rightwards arrow 2NH sub If 6 liters of hydrogen gas are used, how many liters of nitrogen gas will be needed for the above reaction at STP

Answers

Answer:

2L of nitrogen gas will be needed

Explanation:

Based on the following reaction:

N₂ + 3H₂ → 2NH₃

1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia.

If 6L of hydrogen (In a gas, the volume is directly proportional to the moles, Avogadro's law) react, the volume of nitrogen gas required will be:

6L H₂ * (1mol N₂ / 3 moles H₂) =

2L of nitrogen gas will be needed

What is the oxidation number for S in the compound SO3? (Recall that O has an oxidation number of –2.) A. 0

Answers

Answer:

[tex]\boxed {\boxed {\sf +6}}[/tex]

Explanation:

A compound must have a net charge of 0. The charges have to balance each other out and equal 0.

We have the compound sulfur trioxide with a chemical formula of SO₃.

Oxygen (O) has an oxidation state of -2, which means it will have a charge of -2 in the compound. However, note there is a subscript after the O in the chemical formula. Therefore, there are 3 oxygen atoms in the compound and each one has a charge of -2. The oxygen has an overall charge of -6 because 3*-2 = -6.

There is only one atom of sulfur (there is no subscript, so a 1 is implied). It has to balance out the -6 charge of the oxygen atoms, so it must be +6.

The oxidation number for sulfur is +6 in the compound sulfur trioxide.

Answer:

+6

Explanation:

edge 2021!

Create the Equation: How many grams of Aluminum Chloride would be made in a reaction between 50.0 g of Aluminum and 125g of Magnesium Chloride?

Answers

Answer:

0g

Explanation:

Magnesium is more reactive than aluminium so no reaction occurs

A student lives in a place that receives lots of snow and ice during the winter. The student has observed that the highway department spreads salt on the road after a snowfall. Which of the following correctly explains why the highway department uses salt on the roads?

Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.

Salt raises the freezing point of water, which makes the melted snow on the road less likely to form ice.

Salt raises the vapor pressure of water, which makes the melted snow more likely to evaporate before it freezes.

Salt lowers the osmotic pressure of water, which makes the melted snow more likely to be absorbed into the ground before it freezes.

Answers

Answer:

Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.

Answer:

A

Explanation:

Edge.

What is the process of old crust sinking back into the mantle? *

a. earthquake
b. transform boundary
c. seafloor spreading
d. subduction

Answers

Answer:

dddddddddddddd

ddddddddddddddddd

explain what thermal energy is and use real life examples to support your explanation (science)

Answers

Answer:

boiling water on a stove is an example of thermal energy thermal energy produced when the atoms and molecules is in a substance vibrate faster due rise in temperature .

PLEASE mark brainlest ......... please

What processes and involved in the creation of sedimentary rock? Please help

Answers

Answer:

yuhhhhhhhhhhh

Explanation:

How much energy is released when 6.0 g of water is condensed from water to vapor?

Answers

Answer:6.0g x 1 mol/18.02g x 40,65 kJ/mol

Explanation: just did the quiz

13.6 kilojoules (kJ) of energy is released when 6.0 g of water is condensed from water to vapor.

To calculate the energy released when 6.0 grams of water is condensed from water to vapor, we need to use the concept of heat of vaporization (also known as enthalpy of vaporization). The heat of vaporization is the amount of energy required to change one gram of a liquid into vapor at its boiling point, without any change in temperature.

The heat of vaporization of water is approximately 40.7 kJ/mol at its boiling point (100°C or 373.15 K). We can use this information to calculate the energy released when 6.0 grams of water is condensed.

Step 1: Calculate the number of moles of water (H₂O) in 6.0 grams.

Molar mass of water (H₂O) = 2 g/mol (for hydrogen) + 16 g/mol (for oxygen) = 18 g/mol

Number of moles of water = Mass of water / Molar mass of water

Number of moles of water = 6.0 g / 18 g/mol = 0.333 moles

Step 2: Calculate the energy released during condensation.

Energy released = Number of moles of water × Heat of vaporization

Energy released = 0.333 moles × 40.7 kJ/mol = 13.6 kJ

Therefore, approximately 13.6 kilojoules (kJ) of energy are released when 6.0 grams of water is condensed from water to vapor.

To know more about condensed here

https://brainly.com/question/1447093

#SPJ2

The evidence of chemical changes with an example of each (include all 5)

Answers

Answer:

??????????

Explanation:

What is the difference between the reaction of CH3COOH with H20 and with OH?​

Answers

Answer:

Explanation:  CH3COOH(aq) + H2O(l) ↔ CH3COO-(aq) + H3O+(aq) acid base ... sulfuric acid can react with either OH- or. H.

Food chains always begin with what type of organism? Why?

Answers

Food chains always begin with the sun but the organism that it starts with is a plant typically grass. Plants are fuel for consumers

One orbit of the earth around the sun equals _____________ miles.

595 million
360 million
5,280

Answers

Answer:

it's about 580millon, but the closest you have is 595 million, so pick that one

Answer:

should be 595 !

Explanation:

Periodic table 50 elements with thier valancies​

Answers

Answer:

The first 50 elements along with their valences are given below :

1. Hydrogen = 1

2. Helium = 0

3. Lithium = 1

4. Beryllium = 2

5. Boron = 3

6. Carbon = 4

7. Nitrogen = 3

8. Oxygen = 2

9. Fluorine = 1

10. Neon = 0

11. Sodium = 1

12. Magnesium = 2

13. Aluminium = 3

14. Silicon = 4

15. Phosphorus = 3

16. Sulphur = 2

17. Chlorine = 1

18. Argon = 0

19. Potassium = 1

20. Calcium = 2

21. Scandiun = 3

22. Titanium = 3

23. Vanadium = 4

24. Chromium = 3

25. Manganese = 4

26. Iron = 2

27. Cobalt = 2

28. Nickel = 2

29. Copper = 2

30. Zinc = 2

31. Gallium = 3

32. Germanium = 4

33. Arsenic = 3

34. Selenium = 2

35. Bromine = 1

36. Krypton = 0

37. Rubidium = 1

38. Strontium = 2

39. Yttrium = 3

40. Zirconium = 4

41. Niobium = 3

42. Molybdenum = 3

43. Technetium = 7

44. Ruthenium = 4

45. Rhodium = 3

46. Palladium = 4

47. Sliver = 1

48. Cadmium = 2

49. Indium = 3

50. Tin = 4

Note :

An element like Iron, copper can have more than one valencies.

Answer:

50 elements chemical eq, atomic number, atomic mass, no.of electrons, no.of protons, no.of neutrons, electronic configuration and valancies are given in the above attachment

Explanation:

Hope it helps you

what happens when you burn magnesium in air

Answers

It forms a white powder

Explanation:

Oxygen and magnesium combine in a chemical reaction to form this compound. After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction.

Organelle X is a -
A.
mitochondrion, which makes energy for the cell.
B.
ribosome, with carries proteins within the cell.
C.
centriole, which helps divide the cell in two.
D
lysosome, which helps digest substances inside the cell.

Answers

Answer:

A.

Explanation:

Which of the following movements of ocean water has the greatest direct effect on the growth of producers.
A. Upwelling
B. Deep Current
C. Surface Current
D. Convection Current

Answers

Answer:

A- Upwelling

Explanation:

Other Questions
true or false The absolute value of a number can be negative. answer and I give you 70 points PLS HELP This is a Test it is 6th grade ELA pls help if you know the book The boy who Harnessed the wind pls help ASAP Write any two uses of simple machines. How is Johnsons statement similar to Roosevelts New Deal speech?They both state that work is an important American value.They both declare that workers need labor unions to protect their rights.They both call on Americans to make major sacrifices to bring about change. (Photo is part one)Malik also adds the following ingredients. How many cups of eachdid he add? Show each step of your solution. 28 tablespoons of sugar 6 tablespoons of cocoa powder If 200 customers buy 45 desserts at your store, howmany desserts can you expect to sell to500 people? NO LINKS PLEASEE HELP MEEEEEEEE "a summer to remember" has a distinct structure involving flashbacks, present-day narration, and multiple settings. Analyze how the structure and settings of the passage influence its characters and theme Skye made a deposit of $625 into an account that earns 4% simple interest for 6 years. How much did Skye earn in interest at the end of 6 years? A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?OVNaMgSeSave and Frit What is the answer to 6 ^-2? How did the transcontinental railroad make travel easier in the late 1800s?The railroad provided a new route from the East to the Midwest.The railroad made it easier to cross the Central American isthmus.The railroad shortened the length and difficulty of the trip.The railroad eliminated the need to travel across mountains. which feature of a human is controlled by genes only I learned how to find the area of a triangle with 2 numbers (0.5*b*h), but how do you find the area with 4 numbers? 1. What kind of polyhedron can be assembled from this net?2. Find the surface area (in square units) of the polyhedron. Show your reasoning. Try to form one question for each of these words(boleto, taquilla, payaso,jirafa, pantera, venado, delfin and rana) when you write your sentences If the measure of angle 2 is 100 degrees. What is the measure of angle 8? Why? What are the four types of temperature climates? Help!!!!!!!!!!plz!!!!!!!!!!!! A 15.0 mL solution of 0.10 M Fe(NO3)3 reacts with K2C204 according to the reaction 2 Fe(NO3)3 + 3 K2C2O4 Fe2 (C2O4)3 + 6 KNO3 . What volume of 0.30 M K2C2O4 is needed to react completely? a buffer storage that improve computer performance by reducing access time is