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abruzzese [7]
3 years ago
10

Calculate the perimeter of a rectangle of length 8cm and breath 5/2cm​

Chemistry
1 answer:
beks73 [17]3 years ago
6 0

Answer:

21

Explanation:

P=2(l+w)=2·(8+2.5)=21

Hope this helps :)

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Picture of gas laws question below:
Vera_Pavlovna [14]

Volume of the tank is 5.5 litres.

Explanation:

mass of the CO2 is given 8.6 grams

Pressure of the gas is 89 Kilopascal which is 0.8762 atm

Temperature of the gas is 29 degrees ( 0 degrees +273.5= K) so (29+273)

R = gas constant 0.0821 liter atmosphere per kelvin)

FROM THE IDEAL GAS LAW

PV=nRT ( P Pressure, V Volume, n is number of moles of gas, R gas constant, Temperature in Kelvin)

no of moles = mass/atomic mass

                    =  8.6/44

                    = 0.195 moles

now putting the values in equation

V=nRT/P

  = 0.195*0.0821*302/ 0.8762

  = 5.5 litres.

As the carbon dioxide gas occupies the volume os the tank hence volume of tank is 5.5 litres.

4 0
3 years ago
Name two methods that can be used to break down compounds into simpler substance
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7 0
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An analysis of an ionic compound is found to contain 92 grams of sodium (Na) and 32 grams of oxygen (O). Determine the empirical
Darina [25.2K]
The answer would be c nao2
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Atomic radius aka distance from the nucleus to the outermost energy level. The greater this distance, the less electrostatic attraction between these oppositely charged particles.
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Compare and contrast an element and a compound.<br>PLZ HELP ITS DUE TOMORROW!!​
hjlf

Answer:

Explanation:

The answer is that "elements are a single atom and compounds are a mixture of two elements or more." Elements are atoms that have protons, neutrons, and electrons. Compounds are mixtures with two or more elements.

Hope this helps.

7 0
3 years ago
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