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3 years ago

Which of this is the method by which fire extinguisher works?

Chemistry

2 answers:

Andrew [12]3 years ago

8 0

Answer:

the answer is a.cut off the supply of oxygen

katen-ka-za [31]3 years ago

6 0

Answer:

Option D

Explanation:

There are 5 main fire extinguisher types – Water, Foam, Dry Powder, CO2 and Wet Chemical. Hence the different chemicals released will react with oxygen in the air to prevent the fire from getting sufficient oxygen and spreading.

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Write the Rate Law

Ivanshal [37]

As we know that rate law expression is

$r = k { |a| }^{2} { |b| }^{2}$

(a)

$r = k { |o2| }^{1} { |no2| }^{2}$

(b)

$r = k { |cl2| }^{1}$

(c)

$r = k { |chcl3|}^{1} { |cl2| }^{1}$

#$# HOPE YOU UNDERSTAND #$#

#$¥ THANK YOU ¥$#

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5 0

2 years ago

Which reaction would most likely occur at the cathode of an electrochemical cell?

JulijaS [17]

Answer:

Explanation:

5 0

3 years ago

Which words in the sentence are the adjective clause? Alessandra, whom everyone calls "Al," is the best tennis player on the tea

Alinara [238K]

The answer is D. because that makes more sense

4 0

3 years ago

What do you think is the most important element and why? Include information

Snowcat [4.5K]

Answer:

Hydrogen

Explanation:

It is considered a special element due to its flexibility in giving up & taking in electrons, therefore making it good for organic & inorganic chemistry. Hydrogen has only one proton and one electron and is the only element which has no neutrons. it is considered as the simplest element in the universe and gives a valid reason for it to be the most abundant and common element in the universe.

Hoped this helped! If this doesn't fit your 80 word count, you could shorten it.

5 0

3 years ago

A waste treatment pond is 50 m long and 25 m wide, and has an average depth of 2 m. The density of the waste is 75.3lbm/ft^3 .Ca

umka21 [38]

Answer:

$W = 6.65 \cdot 10^{6} lbf$

Explanation:

To find the weight (W) of the pond contents first we need to use the following equation:

$W = m\cdot g$ (1)

Where m the mass and g is the gravity

Also, we have that the mass is:

$m = \rho*V$ (2)

Where ρ is the density and V the volume

We cand calculate the volume as follows:

$V = L*w*d$ (3)

Where L is the length, w is the wide and d is the depth

By entering equation (2) and (3) into (1) we have:

$W = \rho*L*w*d*g$

$W = 75.3 lbm/ft^{3}*50 m*25 m*2 m*9.81 m/s^{2}$

$W = 75.3 lbm/ft^{3}*\frac{(1 ft)^{3}}{(0.3048 m)^{3}}*\frac{0.454 kg}{1 lbm}*50 m*25 m*2 m*9.81 m/s^{2} = 2.96 \cdot 10^{7} N}*\frac{0.2248 lbf}{1 N} = 6.65\cdot 10^{6} lbf$

Therefore, the weight of the pond is 6.65x10⁶ lbf.

I hope it helps you!

6 0

3 years ago