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kolezko [41]
3 years ago
5

How many moles are equal to 145 g of sodium carbonate?

Chemistry
2 answers:
vladimir1956 [14]3 years ago
5 0
More explain??!!?!???
slavikrds [6]3 years ago
3 0

Answer:

There are

0.0642 mol Na

2

CO

3

in

6.80 g

.

Explanation:

The chemical formula of sodium carbonate is

Na

2

CO

3

. The molar mass of sodium carbonate is

105.988439 g/mol

.

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NEEED HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Nina [5.8K]

True because the biosphere contains

life such as animals and plants Hint the word “bio”

5 0
3 years ago
Which of the following statements is TRUE?Group of answer choicesNone of the above are true.Dispersion forces are generally stro
Elena L [17]

Answer:

Correct option: Vapor pressure increases with temperature

Explanation:

Vopor pressure: it is defined as the pressure exerted by gaseous molecule on the surface of container and vopor is produced by only volatile component of solution.  

Kinetic energy of molecule depends on the temperaure of sample or molecules when temperature is increased then its kinetic energy also increased and as kinetic energy increases then the chances of molecule going into vapour phase increases thereby increasing the vapour pressure.

hence Vapor pressure increases with temperature

4 0
3 years ago
The plunger on a bicycle pump with a 400 mL volume cylinder is
Kobotan [32]

Answer:

The answer to your question is V2 = 66.7 ml

Explanation:

Data

Volume 1 = V1 = 400 ml

Pressure 1 = P1 = 1 atm

Volume 2 = V2 = ?

Pressure 2 = P2 = 6 atm

Process

1.- To solve this problem use Boyle's law

                     P1V1 = P2V2

-solve for V2

                     V2 = P1V1 / P2

-Substitution

                      V2 = (1)(400) / 6

-Simplification

                      V2 = 400 / 6

-Result

                      V2 = 66.7 ml

4 0
3 years ago
How many moles of pcl5 can be produced from 28.0 g of p4 (and excess cl2)?
BARSIC [14]
P₄ + 10Cl₂ ---> 4PCl₅
stoichiometry of P₄ to PCl₅ is 1:4
number of moles of P₄ reacted - 28.0 g / 124 g/mol = 0.22 mol 
Cl₂ is in excess therefore P₄ is the limiting reactant, amount of product formed depends on amount of limiting reactant present 
according to molar ratio of 1:4
number of PCl₅ moles formed  -0.22 mol x 4 = 0.88 mol 
0.88 mol of PCl₅ is formed 

5 0
3 years ago
Marvin records scientific data about Lake Superior. For which property has Marvin forgotten to use an SI unit of measurement?
Illusion [34]

Answer: low temperature

Explanation:-

S.I or M.K.S is a system for defining physical units as meter, kilogram, second, ampere, kelvin or celcius, candela, and mole together with a set of prefixes to indicate multiplication or division by a power of ten for measuring length, mass, time , current, temperature and amount of substance respectively.

Given :

lake length = 563 kilometers = 563\times 10^3m

High temperature =76.5^0F

Low temperature =-6.3^0C

annual precipitation =762 mm= 762\times 10^{-3}m

Thus low temperature in units of Fahrenheit is not an S.I unit of measurement.

8 0
3 years ago
Read 2 more answers
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