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2 years ago

Is a burning log an exothermic or endothermic event if the log is the system?

Chemistry

1 answer:

denpristay [2]2 years ago

6 0

It would be endothermic because the log is in the system.

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Which statement best describes the density of an atom's nucleus?<br>

malfutka [58]

Answer:

Very small

Explanation:

Simply science

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3 years ago

Coal and petroleum are useful because the both have ___ stored in them.

gizmo_the_mogwai [7]

I think the answer is 4 carbon dioxide

5 0

3 years ago

Read 2 more answers

A meteor falls toward Earth's surface. Given that the acceleration due to

ICE Princess25 [194]

Answer:

E = 147000 J

Explanation:

Given that,

The mass of meteor, m = 50 kg

The altitude of the meteor, h = 300 m

We need to find the potential energy of the meteor. The formula for the potential energy is given by :

$E=mgh$

Put all the values,

$E=50\times 9.8\times 300\\\\E=147000\ J$

So, the required potential energy is equal to 147000 J.

4 0

3 years ago

Find the work done using data from the PV plot for an isothermal system.

Eduardwww [97]

Answer:

W = - 500 KJ

∴ the work is done on the system

Explanation:

isothermal system:

∴ ΔU = 0; ⇒ Q = W

∴ W = P1V1 -P2V2

⇒ W = ((100KPa)*(25m³)) - ((300KPa)*(10m³))

⇒ W = 2500KPa.m³ - 3000KPa,m³

⇒ W = - 500 KPa.m³ = - 500 KJ

∴ W (-) the work is done on the system

8 0

3 years ago

How many neon atoms are contained in (7.27x10^2) grams of neon?

statuscvo [17]

Answer: 2.19x10^25 atoms

Explanation:

Molar Mass of Neon = 20g/mol

1mole(20g) of Neon contains 6.02x10^23 atoms.

Therefore, 7.27x10^2g of Neon will contain x atoms i.e

X atoms = (7.27x10^2x6.02x10^23)/20 = 2.19x10^25 atoms

4 0

3 years ago