calculate the mass of 0.5 moles of caco3 in grams with procedure ​

Answers

Answer 1

Answer:

50g

Explanation:

moalr mass of CaCO3= 40g/mol+ 12g/mol+(16g/mol*3)

                                   =52g/mol+48g/mol

                                   =100g/mol

1 mol= 100g

0.5mol=x

by cross multiplication,

0.5*100gmol=x mol

x=50g


Related Questions

An element has the atomic number 72. The number of protons and electrons in a neutral atom of this element is

Answers

Explanation:

Hi,

The number of protons is equal to the atomic number. The number of electrons in a neutral atom is equal to the number of protons. So, in this case, you have 72 protons and 72 electrons.

I hope this helps :)

If an element has the atomic number 72, then the number of protons is also equal to 72. As it is clearly mentioned in the question that it is a neutral atom, which means the number of protons is equal to the number of electrons which is also 72.

What is meant by an Atomic number?

An atomic number may be defined as the number of a chemical element in the modern periodic table through which the elements are systematically arranged in order of increasing the number of protons in the nucleus.

According to the context of this question, the atomic number of every element is always equal to the number of protons it has. While in a neutral atom, the number of electrons is equal to the number of protons. For calculating the number of neutrons, you have to subtract the atomic number from the atomic mass.

Therefore, there are 72 protons of an element whose atomic number is 72. The number of electrons is also 72.

To learn more about Atomic numbers, refer to the link:

https://brainly.com/question/27655686

#SPJ2

The Balanced equation for the combustion of ethene is given below. If 97.7 g of oxygen is used, how much heat energy will be produced?

Answers

Answer:

the answer is d. 74.02

Explanation:

When ogyen all together with the different things to get this.

HELP!!! WILL MARK BRAINLIEST!!!
picture attached below

Answers

Answer:

0.2 cm

Explanation:

looking at the ruler, you can see that the diameter is 0.4 cm. to get the radius, just divide by two, which gets 0.2 cm as the radius


Ca(NO3)2 wht is the mass

Answers

Answer:

164.088 g/mol

Explanation: hope this helps

Answer:

Calcium nitrate

Explanation:

164.088 g/mol

give me the brainliest plss

in which type of condition is a conditions is a landslide most likely to occur

Answers

Answer:

B. In a wet, hilly area

Explanation:

We know that for a landslide to happen, there has to be a down hill slope so it can fall.

This eliminates answers C, D and E.

So we are left with A and B

Now we can look at this in a real life scenario. If you have ever walking on wet ground, you will know that is weaker than dry ground. Knowing this, we know the answer will have to be answer B.

please help!!
i’m trying to go to sleep

Answers

Answer:

4) C

6) true

I am not sure about 5th one

4) evaporation rate  

5) acetone

6) true

unknown substance's mass: 75.0g, unknown substances molar mass = 150.0 g/mol, Hfus = 5.0x10^3 J/mol, Hvap = 1.00 x 10^4 J/mol, unknown substance's specific heat (liquid) = 2.2 J/g, unknown substance's specific heat (gas) = 4.8 J/g, unknown substances's specific heat (solid) = 5.0 J/g; Calculate the amount of heat (in J) for the unkown sample as it is heated at a constant rate from 10.0c to 25.0c as it passes through each of the following regions: region uv

Answers

These are the answers hope this helps

Answer:

kkajqjjqjqjnqnqnqjqjq

Pls answer I am giving lots of points and need all the work shown. Determine the kb for chloroform when 0.793 moles of solute in 0.758 kg changes the boiling point by 3.80 °C.

Answers

Answer:0.87

Explanation:

Wat two common uses for Zinc???

Answers

Answer:

Zinc oxide is  used in the manufacture of  many products such as paints, rubber, cosmetics, pharmaceuticals, plastics, inks, soaps, batteries, textiles and electrical equipment.

Explanation:

The diagram below represents the bone
arrangements in the front limbs of three different
species of mammals.
The similarities and differences in these limbs
suggest that all three species developed from the
same ancestor, but

Answers

Answer:

these species share a common ancestor

Explanation:

formula of velocity rate​

Answers

Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.

Answer:

V=d/t

,,,,,,,,,,,,,,,,,

. What is the molarity of 5.30 moles of NaCl dissolved in 0.400 L of solution?

Answers

Answer:

13.25 M

Explanation:

Molarity is moles over liters so simply plug your values in as such:

5.30 mol ÷ 0.400 L = 13.25 M

Hydroelectric requires this force to increase the mechanical energy gathered.

Combustive

Velocity

Gravitational

Thermal

Answers

Velocity because it means the speed and direction of motion. Hydroelectric is a denoting the generation of electricity using flowing water.

What are the products of the following neutralization reaction? (No need to balance)
H3PO4 + Ba(OH)2 --> ??? + ???

A.)H2O + Ba3(PO4)2
B.)H30+ + BaPO4
C.)H30+ + Ba3(PO4)2
D.)H2O + BaPO4

Answers

H3PO4 + Ba(OH)2 --> Ba3(PO4)2 + H2O

so, (A) H2O + Ba3(PO4)2 is your answer.

How many formula units are there in 7.55 moles potassium chloride?

Answers

Answer:

mole is equal to 1 moles Potassium Chloride, or 74.5513 grams.

Somebody look at all the science questions i posted plzzz help ( i will give brainliest

Answers

Answer:

ok

Explanation:

Where are the questions?

Can a molecular formula ever be the same as an empirical formula? Explain your answer.

Answers

Answer:

The molecular formula for a compound can be the same as or a multiple of the compound's empirical formula. Molecular formulas are compact and easy to communicate; however, they lack the information about bonding and atomic arrangement that is provided in a structural formula.

Explanation:

Answer: Hello Luv......

Hope this helps. Please mark me brainest... Anna ♥

Explanation:

The molecular formula for a compound can be the same as or a multiple of the compound's empirical formula. Molecular formulas are compact and easy to communicate; however, they lack the information about bonding and atomic arrangement that is provided in a structural formula.

Please answer all of the examples below!

Answers

Answer:

The first one is balanced. The second one is not.

Explanation:

The first one is balanced because there are the same amount of elements on the reactant side as there are on the product side. The second one is not balanced because there are not the same amount of elements on the reactant side as there are on the product side. Therefore, it is not balanced

More Detailed: first example

Reactant side (left of arrow)

H: 2

C: 1

O: 3

Product side (right of arrow)

H: 2

C: 1

O: 3

More detailed: second example

Reactant side:

Na: 1

O: 1

H: 1

C: 1

Product side:

Na: 2

O: 4

H: 2

C: 1

the variables needed to balance this equation is 2,1, 1, 1.

Lightning is caused by the build-up of and subsequent striking of electrons against the ground. Is a lightning bolt striking the ground an example of potential or kinetic energy?

Answers

Answer:

Kinetic

Explanation:

How can genetic mutations be passed to offspring?

A. In sex cells
B. In body cells
C. Through environmental factors
D. Through animal transmission factors

Answers

Answer:

I think the answer is b

Explanation:

I hope this helps

What volume in liters will 50.0g CO occupy? please show work.

Answers

Answer:

40.0L is the volume the CO occupy

Explanation:

To solve this question we must assume the gas is at STP. To find the volume of a gas using the moles, temperature and pressure of the gas we have to use:

PV = nRT

V = nRT / P

Where V is volume in liters

n are moles of the gas -Molar mass CO: 28g/mol-

50.0g * (1mol / 28g) = 1.786 moles CO

R is gas constant = 0.082atmL/molK

T is absolute temperature = 273.15K at STP

P is pressure = 1atm at STP

Replacing:

V = 1.786moles*0.082atmL/molK*273.15K / 1atm

V = 40.0L is the volume the CO occupy

Which of these is the BEST definition of "civilization" for a history class? A) the way people talk B) a group that has a culture C) the ability to walk upright D) how sophisticated people behave

Answers

B) A group that has a culture

Answer:

Is C

Explanation:

What is a subcript? Give an example.

Answers

Subscript is the text which a small letter/number is written after a particular letter/number. It hangs below its letter or number.

Answer:

subscript is a character

Explanation:

A subscript is a character (such as a number or letter) that is set slightly below or above the normal line of type, respectively. It is usually smaller than the rest of the text.

Perform the following operation and express the answer in scientific notation. 7.0x10^3 x 1.1x10^7​

Answers

Answer:

The answer is 7.7 ×10¹⁰

Explanation:

7.0 × 10³ × 1.1 × 10⁷

7.7 ×10¹⁰

Thus, The answer is 7.7 ×10¹⁰

-TheUnknownScientist

What type of bond would be formed between nitrogen (N) and nitrogen (N)? Why?

an ionic bond because there is less than a 0.4 difference in electronegativity between the atoms

a polar covalent bond because there is less than a 0.4 difference in electronegativity between the atoms

a nonpolar covalent bond because there is less than a 0.4 difference in electronegativity between the atoms

Answers

Answer: The compound formed between nitrogen (N) and nitrogen (N) a polar covalent bond because there is less than a 0.4 difference in electronegativity between the atoms.

Explanation:

If electronegativity difference between two atoms is less than 0.4 then bond formed is a pure covalent bond.

If electronegativity difference between two atoms is between 0.4 to 1.8 then bond formed is a polar covalent bond.

If electronegativity difference between two atoms is greater than 1.8 then bond formed is an ionic bond.

The electronegativity value of a nitrogen atom is 3.04. Hence, the electronegativity difference of [tex]N_{2}[/tex] molecule is as follows.

[tex]Electronegativity difference = electronegativity value of N - electronegativity value of N\\= 3.04 - 3.04\\= 0[/tex]As the electronegativity difference is 0 which is less than 0.4.

Hence, we can conclude that the compound formed between nitrogen (N) and nitrogen (N) a polar covalent bond because there is less than a 0.4 difference in electronegativity between the atoms.

What is the theoretical oxygen demand in liters of air for a 50 mg / L acetone solution, CH3COCH3, to decompose completely?

Answers

Answer:

18.368 Liters

Explanation:

Given that balanced Acetone oxidation,

= C3H6O + 4O2 = 3CO2 + 3H2O

lets assume volume of acetone = 1 liter

mass of acetone =  50 mg

number of moles present = (5*10^-3)g / ( 58.08 ) = 0.0000861 mol

Given that : I mol of ( acetone ) = 4 mol of oxygen

∴0.0000861 mol of acetone = 0.0003444 mol of oxygen

also note that the ratio of air to oxygen is

0.21 mol of oxygen  = 1 mol of air

∴ 0.0003444 mol of oxygen  =  0.00164 mol of air      (0.0003444 / 0.21 )

note : 1 mol at STP = 22.4 L     (at STP = Temperature = O°C

Finally the theoretically oxygen demand in liters of air for a 50 mg/L of acetone to decompose

Given that Acetone decompose/degrade completely between 500°C - 600°

we will take 500°  for the sake of this calculation

The oxygen demand in liters will be

=  22.4 * 0.00164 * 500 = 18.368 Liters

The theoretical oxygen demand in liters of air for a 50 mg / L acetone solution, to decompose completely is 18.368 Liters.

How we calculate moles?

Moles of any substance will be calculated as:

n = W/M, where

W = given mass

M = molar mass

Given chemical reaction is:

CH₃COCH₃ + 4O₂ → 3CO₂ + 3H₂O

Given mass of acetone = 50mg = 0.05g

Moles of acetone = 0.05g / 58.08g/mol = 0.0000861 mole

From the stoichiometry of the reaction, it is clear that:

1 mole of CH₃COCH₃ = 4 moles of O₂

0.0000861 mole of CH₃COCH₃ = 4×0.0000861=0.0003444 moles of O₂

We know that ratio of air is:

0.21 mole of oxygen present = in 1 mole of air

0.0003444 mole of oxygen present = in 0.0003444/0.21=0.00164 mole of air

At STP 1 mole of gas is present in 22.4 Liter.

Degradation of acetone takes place in 500°C - 600°C.

Theoretical oxygen demand = 22.4×0.00164×500 = 18.368 Liters

Hence, theoretical oxygen demand is 18.368 Liters.

To know more about theoretical oxygen demand, visit the below link:

https://brainly.com/question/13251445

A generator can produce both _______________________ (DC), which flows in one direction,and AC current;large power plants produce ___________________.

Answers

Answer:

1. direct current. 2. electrical power

Explanation

i believe number 2 is right

C=C + H-H —> C-H + C-H

Answers

Answer:

What is that supose to mean?

Answer:

I would never think that would be even a real question....what does it mean? what math problem is this?! I've never seen this in my life...does it mean... CCHHCHCH? *laughs nervously*

Explanation:

Have a Blessed Day.

why can lime juice remove rust stain​

Answers

Answer:

El limon por su alto contenido en ácido cítrico, actúa como un excelente limpiador natural debido a su bajo pH y propiedades antibacterianas. A parte de todas estas propiedades, los limones huelen muy bien y es una rareza que pudiesen manchar o dañar algún material de la casa.

Explanation:

Answer:

It's the citric acid reacting to the iron oxide -which is basically the rust- it dissolves.

Explanation:

PLS HELP

A 20.8 gram piece of metal at 184.9 oC is dropped into 87.7 grams of water at 19.2 oC. The water temperature rose to 54.6 oC. Calculate the specific heat of metal in J/g oC. (round to the tenths place) (DO NOT PUT UNITS IN YOUR ANSWER.)

Assume that all of the heat lost by the metal is transferred to the water and no heat is lost to the surroundings. The specific heat of water is 4.184 J / g oC.

Answers

Answer:

Explanation:

A 12.48 g sample of an unknown metal, heated to 99.0 °C was then plunged into 50.0 mL of 25.0 °C water. The temperature of the water rose to 28.1 Go to calculating final temperature when mixing two samples of water ... Problem #1: A 610. g piece of copper tubing is heated to 95.3 °C and placed in an ... The two rings are heated to 65.4 °C and dropped into 12.4 mL of water at 22.3 °C. ... Problem #4: A 5.00 g sample of aluminum (specific heat capacity = 0.89 J g¯1

someone put the answer btw
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