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nasty-shy [4]
3 years ago
7

Naphthalene combustion may be used to calibrate the heat capacity of a bomb calorimeter. The heat of combustion of naphthalene i

s –40.1 kJ/g. When 0.8210 g of naphthalene was burned in a bomb calorimeter containing 1.000 kg of water, a temperature rise of 4.21°C was observed. What is the heat capacity of the bomb calorimeter excluding the water?
Chemistry
1 answer:
tino4ka555 [31]3 years ago
5 0

Answer:

.

Explanation:

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Scientists have speculated that element 126 might have a moderate stability allowing it to be synthesized and characterized. Pre
Dennis_Churaev [7]

Answer:

[Og] 5g2 6f3 8s2 8p1

Explanation:

Unbihexium, or element 126 is a hypothetical chemical element, until the element is discovered, confirmed and a permanent number is decided. This element is expected to be a g-block superactinide and the eight element in the 8th period.

5 0
3 years ago
You and your lab partner are asked to determine the density of an aluminum bar. The mass is known accurately to 4 significant fi
zmey [24]

Answer:

Average density for method A = 2.4 g/cm³

Average density for method B = 2.605 g/cm³

Explanation:

In order to calculate the average density for each method, we need to add the data for each method, and then divide the result by the number of measurements (in this case is 4 for both methods):

  • For Method A:

Σ = 2.2 + 2.3 + 2.7 + 2.4 = 9.6

Average = 9.6/4 = 2.4 g/cm³

  • For Method B:

Σ = 2.603 + 2.601 + 2.605 + 2.611 = 10.420

Average = 10.420/4 = 2.605 g/cm³

5 0
3 years ago
Why is the Universal Law of Gravitation is a scientific Law and not a theory?
scoundrel [369]
This is a law because it describes the force but makes not attempt to explain how the force works. A theory is an explanation of a natural phenomenon. Einstein's General Theory of Relativity explains how gravity works by describing gravity as the effect of curvature of four dimensional spacetime.
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2 years ago
An iron atom has an atomic mass of 56. Its
Ghella [55]

Answer:

Iron has 30 neutrons.

A neutral iron atom contains 26 protons, 30 neutrons, plus 26 different shells around the nucleus.

Explanation:

Brainliest please! Visit my church's website at fbcinterlaken.org to learn more about God! It would mean a lot if you could also subscribe to the You Tube channel as well! Thank you and have a nice day! :)

7 0
3 years ago
In bohr's atomic theory, when an electron moves from one energy level to another energy level more distant from the nucleus,
labwork [276]

Answer is: energy is absorbed.

According to the Bohr model of the atom:

1. Electrons orbit the nucleus in orbits that have a set size and energy.

2. Energy levels of electrons are discrete (certain discrete values of energy).

3. Electrons can jump from one energy level to another, absorbing or emitting electromagnetic radiation with a frequency ν (energy difference of the levels).

5 0
3 years ago
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