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malfutka [58]
3 years ago
8

Describe how a comet changes as it travels through space?

Chemistry
1 answer:
omeli [17]3 years ago
3 0
It begins to form ice and also on its tail that is ice mixed with rocks and junk but if t where to crash on earth it would come through the atmosphere causing in to burn at amazing speeds.  <span />
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Which separation technique could be used to separate a mixture based on differnces in boiling point.
makvit [3.9K]
The answer is B! Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material
6 0
3 years ago
For which of the following processes would S° be expected to be most positive? a) O2(g) + 2H2(g)  2H2O(g) b) H2O(l)  H2O(s) c
vaieri [72.5K]

Answer:

Explanation:

a) O₂(g) + 2H₂(g) = 2H₂O

b) H₂O(l) = H₂O(s)

c) NH₃(g) + HCl(g) =  NH₄Cl(g)

d) 2NH₄NO₃(s) =  2N₂(g) + O₂(g) + 4H₂O(g)

e) N₂O₄(g) =  2NO₂(g)

ΔS is positive when there is increase in disorderliness. It happens when there is increase in volume .

Increase is volume is maximus in the following reaction.

d) 2NH₄NO₃(s) =  2N₂(g) + O₂(g) + 4H₂O(g)

in this reaction solid NH₄NO₃ is changed to 7 x 22.4 L of gases so there is maximum increase in volume . Hence maximum increase in entropy . Hence ΔS is most positive .

6 0
3 years ago
Charge of an electron
Zolol [24]

Answer: The charge on one electron is –1.6 x 10–19 coulomb.

Hope this helps!

3 0
3 years ago
Read 2 more answers
Hello can you please help me to solve above questions. .​
topjm [15]

Answer:

i)a. P & R

b. Q& S

ii) R

iii) Atomic no & Atomic radius

2)a. C4H10

b. CH3Cl

7 0
3 years ago
1. What volume is shown in the graduated cylinder below?
hram777 [196]

The volume shown in the graduated cylinder according to the image would 28 mL. Thus, the correct option would be C.

In the cylinder, the top of the liquid formed a concave meniscus with the walls of the cylinder. Thus, the bottom of the meniscus would be read as this is the normal rule.

The rule is such that for liquids that form concave meniscus with the walls of cylinders, the bottom of the meniscus is read while it is the top of the meniscus for liquids that form convex meniscus with the walls of cylinders.

Hence, looking at the image, the bottom of the concave is on the 28 mL mark on the cylinder.

More on concave and convex meniscus can be found here: brainly.com/question/17022999

4 0
2 years ago
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