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LenaWriter [7]
3 years ago
15

The decomposition of ozone, O3, to oxygen, O2, is an exothermic reaction. What is the sign of q?

Chemistry
1 answer:
azamat3 years ago
8 0

Answer:

The sign is negative (-)

Explanation:

it shows that heat was give off to the surrounding

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Hello how do I solve data for plotting graphs?
OverLord2011 [107]
You could solve it by analyzing the points by graphing them on a coordinate plane
4 0
3 years ago
According to the following electron structure, how many valence electrons do these fluorine atoms have? F= 1s12s22p5
ddd [48]
The highest sequence for this shell is the number 2, preceding both the s and p in the diagram. This means that the outermost shell is the second level shell. In this shell, there are 7 electrons, 2 in the 2s orbital and 5 in the 2p orbital.

As a side note (not sure if this is a typo), the electron structure for fluorine begins with a 1s2, not a 1s1.
6 0
3 years ago
Read 2 more answers
To identify a liquid substance, a student determined its density. Using a graduated cylinder, she measured out a 45-mL sample of
nalin [4]

Answer:

Calculated density = 0.8555g/ mL

Probable identity = Toulene

Explanation:

First off, the substance choices are;

isopropyl alcohol (density 0. 785 g/ mL)

toluene ( density 0.866g/ mL)

So upon calculation, if the density of the liquid substance is equal to either of the substances in the choice, it is that substance.

The relationship between density, mass and volume is given as;

Density = Mass / Volume

Mass = 38.5g

Volume = 45ml

Density = 38.5 / 45 = 0.8555g/ mL

Calculated density = 0.8555g/ mL

Among both substances, it is closest to  toluene ( density 0.866g/ mL).

Probable identity = Toulene

8 0
3 years ago
Which term names a small icy object that orbits the sun?
RSB [31]

Answer:

It a comet

Explanation:

that why they are also called dirty snowballs

8 0
3 years ago
An ideal monatomic gas at 300 K expands adiabatically to twice its initial volume. Assume that the process is also quasistatic.
kondor19780726 [428]

Answer:

600k

Explanation:

In this problem, we need to use a gas law that relates temperature to volume. The gas law to use here is the Charles’ law.

The Charles’ law posits that temperature and volume are directly proportional, provided that the pressure is kept constant.

Mathematically:

V1/T1 = V2/T2

We are looking at getting V2, hence we can write the mathematical equation as:

T2 = V2T1/V1

Asides the fact that we know that the gas is monoatomic, we do not know its volume. Let its initial volume be v. Since it expanded adiabatically, this means that its new volume is 2v

Hence: V1 = v , V2 = 2v , T1 = 300k and T2 is ?

Substituting these values, we have the following:

T2 = (2v * 300)/v

T2 = 600k

6 0
4 years ago
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