CHEMISTRY HIGH SCHOOL

If 12.6 grams of iron (III) oxide react with 9.65 grams of carbon monoxide to produce 7.23 g of pure iron, what are the theoretical yield and percent yield of this reaction? Be sure to show the work that you did to solve this problem. unbalanced equation: Fe2O3 + CO yields Fe + CO2

Answers

Answer 1
Answer: Theoretical yield of Fe = 8.736gm. Percent yield of Fe = 82.76 %. Hope you are able to see solution :)

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a gas at 155 kPa and 298 K occupies a container with an initial volume of 1.00 L. By changing the volume, the pressure of the gas increases to 605 kPa as the temperature is raised to 398 K. What is the new volume?

Answers

Given: P1=155kPa P2=605kPa   T1=298K  T2=398K V1=1.00L

Unknown: V2=?

Formula: V2= V1P1T2/P2T1

Solution: V2= 1.00Lx155kPax398K/605kPax298K
               V2= 61,690/180,290=n
Answer: V2= 0.34L is the new volume

Two chemical properties associated with Bromine

Answers

2 Chemical properties of Bromine (Br):

Melting point: -7.2 degrees Celsius

Boiling Point: 58.8 degrees Celsius
Melting point and Boiling Point

All gaseous mixtures are solutions.

Answers

The statement "All gaseous mixtures are solutions." is true. This is because there are a number of gaseous molecules present in a volume of gas and they are considered solutions.

What mass of chloride gas will react with 96.6g of sodium?

Answers

Molar mass :

Cl₂ =  71.0 g/mol        Na = 23.0 g/mol

2 Na + Cl₂ = 2 NaCl

2 x 23 g Na -------> 71.0 g Cl₂
96.6 g Na ----------> ?

Mass Cl₂ = ( 96.6 x 71.0 ) / ( 2 x 23 )

Mass Cl₂ = 6858.6 / 46

= 149.1 g of Cl₂

hope this helps!

Which of the following is a heterogeneous mixture?A. Oil and Vinegar
B. Air
C. Milk
D. Vinegar in water

Answers

Answer:

B

Explanation:

b/c air is not seen by eye

What is frezzing pointvof light​

Answers

Answer:

Depends from where the light is

Explanation:

If it is in the north pole than it will be 0°C

Answer:

You cannot freeze light.

Explanation:

Only some scientists have been able to freeze light. But, they have only been able to freeze light for about 1 minute.
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