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Kamila [148]
3 years ago
11

How does a student need to adjust the bunsen burner in order to change a luminous yellow flame into a non luminous blue flame?

Chemistry
2 answers:
11Alexandr11 [23.1K]3 years ago
6 0
A student can adjust the bunsen burner in order to change a luminous yellow flame into a non luminous blue flame by opening the vents of the burner allowing more oxygen from air to combust the fuel. Allowing more oxygen would lead to a more complete combustion resulting to a blue flame.
WINSTONCH [101]3 years ago
4 0

Answer:

Open the air holes

Explanation:

Hello,

In this case, by opening the air holes we allow more oxygen to enter in contact with the fuel so a hotter blue nonluminous flame appears as a product of the complete combustion of the fuel. On the other hand, by closing the air holes, an incomplete reaction undergoes, so a luminous yellow flame comes up.

Best regards.

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If a subject is changing from a vapor to a liquid, like steam on a mirror, it is said to be ---------- ?
Alecsey [184]
<h2>Answer:</h2>

condensation

<h3>Explanation:</h3>

Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.

Condensation is the reverse of vaporization.

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3 years ago
Question
Paul [167]

Answer: A,B

Explanation:

8 0
3 years ago
At a certain temperature, iron (II) oxide, FeO, can react with carbon monoxide, CO, to form elemental iron, Fe, and carbon dioxi
barxatty [35]

Answer:

The pressure of CO2 at the equilibriumis 0.185 atm

Explanation:

Step 1: Data given

The value of Kp at that temperature is 0.242

FeO was initially in a container with CO at a pressure of 0.95 atm

Step 2: The balanceequation

FeO(s) + CO(g) ⟷ Fe(s) + CO2(g)

Step 3:The initial pressure

pCO = 0.95 atm

pCO2 = 0 atm

Step 4: The pressure at the equilibrium

pCO = 0.95 - x atm

pCO2 = X atm

Step 5: Calculate Kp

Kp = pCO2 / pCO

0.242 = X / (0.95 - X)

X = 0.185

pCO = 0.95 - 0.185 =  0.765 atm

pCO2 = 0.185 atm

The pressure of CO2 at the equilibriumis 0.185 atm

7 0
3 years ago
7 on the pH scale represents what?
Nitella [24]

Answer:

seven on the ph scale is the neutral point

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The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

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