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sveta [45]
3 years ago
15

I build a fire and burn 3 logs. Apply the Law of Conservation of Matter

Chemistry
1 answer:
photoshop1234 [79]3 years ago
7 0
Capture all of the smoke and weight it. it will weigh exactly the same before and after you burn it but will just be CO2 and H2O gas.
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Which statement about gravity is true?
Alecsey [184]

Answer:

statement about property is not true

Explanation:

if you think the answer is Grace Mark me as brain a list

3 0
3 years ago
Help! Please :) Thank you
BartSMP [9]
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I believe this is the correct answer
5 0
3 years ago
An ideal gas is allowed to expand from 5.40 L to 35.1 L at constant temperature. By what factor does the volume increase?
horrorfan [7]

Answer:

a) 6.5

b) pressure decreases

c)22 atm

Explanation:

Since the initial volume V1 is 5.40 L and the final volume V2 is 35.1 L, the ratio of V2:V1= 35.1/5.40= 6.5 hence the volume increases by a factor of 6.5.

When the volume increases, the pressure decreases accordingly in accordance with Boyle's law. Boyle's law states that the volume of a given mass of gas is inversely proportional to its pressure at constant temperature.

c) From Boyle's law

Initial volume V1= 5.40 L

Final volume V2= 35.1 L

Initial pressure P1= 143 ATM

Final pressure P2 = the unknown

P1V1= P2V2

P2= P1V1/V2

P2 = 143 × 5.40/ 35.1

P2= 22 atm

6 0
3 years ago
Por que los egipcios podrían haber construido pirámides?
kicyunya [14]
Eran monumentos funerarios, de manera que su principal función era la de acoger tumbas de los faraones para que el viaje al cielo fuese más sencillo
4 0
3 years ago
Calculate the bond energy of HBr.Bond energy of H2 is 436KJ/mol and that of Br2 is 193KJ/mol.
lina2011 [118]

Answer:

ΔH3 =  1/2 (629) - ΔH^0

Explanation:

Given data:

Bond energy of H2 = ΔH1 =  436 Kj/mol

Bond energy of Br2 = ΔH2 = 193 Kj/mol

To find:

Let bond energy of HBr = ΔH3 = ?

Equation:

H2 + Br2 → 2HBr

enthalpy of formation of HBr = ΔH1 + ΔH3 - 2(ΔH3)

ΔH^0 = 436 + 193 -   2(ΔH3)

(436 + 193) - ΔH^0 = 2(ΔH3)

ΔH3 =  1/2 (629) - ΔH^0

3 0
3 years ago
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