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attashe74 [19]
2 years ago
6

Help plz:)))I’ll mark u Brainliest

Chemistry
1 answer:
Triss [41]2 years ago
6 0

Answer:

Explanation:

We want the energy required for the transition:

CO  2 ( s ) + Δ → C O 2 ( g )

Explanation:

We assume that the temperature of the gas and the solid are EQUAL.

And thus we simply have to work out the product:

2 × 10^ 3 ⋅ g × 196.3 ⋅ J ⋅ g − 1  to get an answer in  Joules  as required.

What would be the energy change for the reverse transition:

C O 2 ( g ) + → C O 2 ( s ) ?

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A compound has a chemical composition of 97.6 g carbon, 4.9 g hydrogen, 52 g oxygen, 45.5 g nitrogen. What is the empirical form
Alekssandra [29.7K]
First  step  is  to  calculate  the  mole  of each   element
that  is;
carbon  97.6/12=8.13moles
hydrogen= 4.9/1=4.9  moles
oxygen 52/16=3.25  moles
nitrogen=45.5/14=3.25 moles

step  two  is  to  calculate  the mole ratio  by   dividing with  the  smallest  number of  moles
that  is  divide  each  mole  with  3.25moles
 carbon=8.13/3.25 =5/2
hydrogen=4.9/3.25= 3/2
oxygen=3.25/3.25=1
nitrogen=3.25/3.25=1
step  3;  multiply  all  the  mole  ratio by  2  to  remove  the  fraction
carbon=5/2  x2 =5
hydrogen=3/2 x2=3
oxygen=1 x2=2
nitrogen  =1x2=2
therefore  the  empirical  formula  is C5H3O2N2(answer c)
8 0
2 years ago
The rate constant for a reaction is 4.65 L mol-1s-1. What is the overall order of the reaction? zero
il63 [147K]

Answer:

second order

Explanation:

units of reaction and their order.

Zero order --> M^1 s^-1 = M/s

First order --> M^0 s^-1 = 1/s

Second order --> M^-1 s^-1 = L/mol s

In the question rate constant k =  4.65 L mol-1s-1. = 4.65 L/mol s

Hence, the reaction is a second order reaction

8 0
2 years ago
Read 2 more answers
Electrons involved in bonding between atoms are____.
mariarad [96]

Answer:

valence electrons

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3 years ago
A sample of gas occupies 7.80 liters at 425°C? What will be the volume of the gas at 35°C if the pressure does not change?
balandron [24]
From ideal gas equation PV = nRT, V/T = nR/P ==> V/T = constant. Therefore V1/T1 = V2/T2 ==> 7.8/698 = V2/308. V = 3.44L {TEMPERATURE IN KELVIN = 273 + 425 AND 35 = 698 AND 308}
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2 years ago
How many liters of oxygen are in 8.32 moles of oxygen at STP
Jlenok [28]

Answer:

186 Liters at STP conditions

Explanation:

1 mole of any gas at STP conditions occupies 22.4 Liters.

Therefore, 8.32 moles O₂(g) = 8.32 moles x 22.4Liters/mole = 186 Liters (3 sig.figs.)

6 0
2 years ago
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