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Gennadij [26K]
4 years ago
13

Can somebody help!!!!

Chemistry
1 answer:
MArishka [77]4 years ago
7 0

Answer: The answer has been attached

Explanation:

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3. give reasons
soldi70 [24.7K]

Answer:

A.A gas exerts pressure on the walls of the container. Reason: They have high kinetic energy and negligible force of attraction to move constantly moving with high speed in all directions. ... These collisions of the gas particles with the container walls exert pressure on the walls of the container.

B A gas exerts pressure on the walls of the container due to imapact of its gas molecules with hight velocity .

C.A wooden table should be called a solid. Reason: It has a definite shape and volume. It is very rigid and cannot be compressed, i.e., it has a solid characteristic.

D.We can easily move our hand in air but to do the same through a solid block of wood we need a karate expert. It is because the molecules of air has less force of attraction between them and a very small external force can separate them and pass through it.

Explanation:

Plz  mark me as a brainlest

3 0
3 years ago
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 9.50 MJ 9
tensa zangetsu [6.8K]

Answer:

709415.584 g

Explanation:

This is a heat capacity  problem. We use the formula below to calculate.

Q=mcΔT

where Q is the quantity of heat

           m is the mass of substance

           ΔT is the change in temperature of substance( T2-T1).

Q= 9.5MJ = 9.5*10^(6}J

C.P = 30.8J/(K.mol)

temperature of sodium increases by 10°C which means our final temperature in kelvin T2 will be 510K

initial temperature T1= 500K

m= Q/[c (T2-T1)]

m= 9.5*10^(6}/ {30.8(510-500)]

m= 30844.156 mol of Na

Converting to grams we multiply by the molar mass of Na.

molar mass of Na = 23

mass of Na=   30844.156 *23

                  =709415.584 g

7 0
3 years ago
At what step of glycolysis one NADH+ H+ is formed?
ElenaW [278]

Answer:

During Glycolysis, there is one step where NADH + H+ is formed from NAD+ O F-6-P - F- 1,6-BP O PGAL – 1,3-BPGA O 2-PGA - PEP O 3-PGA → 2-PGA.

3 0
3 years ago
if the original volume of a gas was 300 ml at 0.250 atm and 400.0 k what is the volume of the gas at 2.00 atm
wolverine [178]

Answer:

the answer is 18.75

4 0
3 years ago
An area of shallow water, surrounded by grassy plants. While out bird-watching, Samantha took this picture. She was in an area o
Xelga [282]

Answer:

The correct answer is marsh.

Explanation:

A kind of wetland that generally gets formed in the transition regions between the aquatic and the terrestrial ecosystems is termed as the marsh. Different kinds of birds and animals are found within a marshland, and various herbaceous species like reeds and grasses are found in the marshy regions.  

The formation of marshes generally takes place close to the streams or lakes, and as all the mentioned characteristics resemble the wetland pictured by Samantha in the given question, thus, the kind of wetland in which Samantha was most likely in is marsh.  

6 0
4 years ago
Read 2 more answers
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