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Slav-nsk [51]
3 years ago
11

Glycerine is known as a negative catalyst.why?​

Chemistry
1 answer:
ioda3 years ago
6 0

Answer:

The presence of 1-2% ethanol as catalyst, suppresses the oxidation of chloroform with oxygen to give a poisonous gas called phosgene. ... Here glycerol acts as negative catalyst. Criteria or characteristics of catalysts. i. The mass and chemical composition of catalyst should remain unchanged at the end of the reaction.

Explanation:

You might be interested in
Neon atoms are known to produce a mass spectrum that consists of three peaks at m/z values of 20, 21 and 22, with the relative a
wel

Answer:

Explanation:

m / z = 20 , 21 , 22

m / 1 = 20 , 21 , 22

m = 20 , 21 , 22 .

ratio of isotopes = 112 : 0.21 : 11.1

Average atomic mass = (112 x 20 + .21 x 21 + 11.1 x 22) / (112 + .21 + 11.1 )

=  (2240 + 4.41 + 244.2) / 123.31

= 2488.61 / 123.31

= 20.18

4 0
3 years ago
Explain how chemists overcome the problem of low yield In industry
mrs_skeptik [129]

High temperature and pressure produce the highest rate of reaction. However, this must be balanced with the high cost of the energy needed to maintain these conditions. Catalysts increase the rate of reaction without affecting the yield. This can help create processes which work well even at lower temperatures.

I hope this helps you.

8 0
4 years ago
1. There is no formation of volcanoes in the convergence between
tester [92]

A volcano is caused by a rupture in the crust from which molten magma

escapes

The correct options are;

  1. B. Two continental plates
  2. C. Volcanoes
  3. C. A tsunami in the ocean
  4. C. The temperature in the mantle is higher than in the crust
  5. A. Volcanic island arcs
  6. A. Earthquake
  7. B. Trench
  8. C. Subduction
  9. A. Fault
  10. C Tsunami
  11. A. Convergent plate boundary
  12. See attached drawing (<em>Based on Department of Education Science Module)</em>
  13. D. a, b and c
  14. C. Converging oceanic plates
  15. It is where the oceanic plates subduct under the continental plate

Reasons:

1. Due to the equal densities and buoyancy of the plates, there is no

subduction and the plates rise to form mountain ranges and no volcanoes.

2. The subduction causes the plates to form magma and then volcanoes.

3. Shallow earthquakes that have their epicenter at the fault line in the

ocean generate a tsunami.

4. The mantle lay under each plate and therefore, the high temperatures

of the mantle does not support the fact.

5. Volcanic arcs are formed in the convergence of two oceanic or oceanic

and continental plates.

6. When two continental plates converge, shallow earthquakes occur.

7. A crack called a trench is formed by the interaction of an oceanic crust

and another crust.

8. A subduction occurs when oceanic plates converge.

9. A fault is produced by horizontal plate movement.

10. A Flip or kick upwards of water is known as a tsunami.

11. Subduction occurs during convergence of two plates such that a

subducted plate goes down beneath an overriding plate.

12. The illustration of seafloor spreading consists of two plates moving

away from each other.

<em>Question 12: Based on Department of Education Science Module</em>.

<em />

13. Earthquake occur at places where the plates are moving (including

subducting).

14. Volcanic island arcs are formed by two oceanic plates.

15. At the location where the continents meet the seas, oceanic plates are

subducted under the continental plate, melted to magma in the mantle

from which volcano is formed.

Learn more about volcanoes here:

brainly.com/question/19424796

5 0
3 years ago
Without constants you would not know which variable affected the
bonufazy [111]
Two independent variables could change at the same time, and you would not know which variable affected the dependent variable
4 0
3 years ago
A student used a sling psychrometer to measure the humidity of the air. If the relative humidity was 65% and the dry bulb temper
nataly862011 [7]

Answer:

3° C

Explanation:

The dew point temperature is the temperature of the air to which the air must be cooled so as to become saturated with the water vapor.

Here it is given that the relative humidity in the air, RH=  is 65%

And the dry bulb temperature is T = 10° C

Therefore, the dew bulb temperature is,

 $Td= T - \frac{100-RH}{5}$

$Td= 10 - \frac{100-65}{5}$

       = 10 - 7

       = 3° C

So the dew point temperature is 3° C .

3 0
3 years ago
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