1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lozanna [386]
2 years ago
6

During which weeks in the moon’s cycle does the moon appear to be getting smaller? please help me-

Chemistry
2 answers:
Umnica [9.8K]2 years ago
4 0
Week 2 and 3 the crescent moons are the smallest shapes
gogolik [260]2 years ago
3 0

Answer: 2 and 3

Explanation:

You might be interested in
How do Cilia and flagella help cells?
otez555 [7]

Answer:

They are protection from the cell!

Explanation:

They move liquid around the cells  and have the same internal structure as each other. They are also found in most microorganisms. Hope this helps :)

3 0
3 years ago
What reactions is : energy released as light or thermal energy ( synthesis, combustion, replacement, decomposition)
Levart [38]
This answer is synthesis
7 0
4 years ago
The formation of CsCl from Cs(s) and Cl2 (g) involves the following steps:
scoray [572]

Explanation:

1) Cs(s)\rightarrow Cs(g)

Energy will be absorbed by the Cs(s) to get converted into Cs(g). In order to break the strong association of particles present in solid to convert it into gaseous state energy will be needed. So, energy will be absorbed by the Cs solid in this reaction.

2) \frac{1}{2}Cl_2(g)\rightarrow Cl(g)

Energy will be absorbed by Cl_2 gas in order to break bond between two Cl atoms to form isolated(alone) single chlorine atom.So, the energy will be absorbed by the chlorine gas molecule in this reaction.

3) Cs(g)\rightarrow Cs^+(g)+e^-

Energy will be absorbed by the Cs(g) to get converted into Cs^+(g) cation. In order to remove an electron from the outer most shell of Cs atom energy will be required by Cs atom, So, energy will be absorbed in this reaction.

4) Cl(g)+e^-\rightarrow Cl^-(g)

Energy will get release in formation of Cl^- anion from Cl atom in gaseous state. Chlorine atom need one electron to attain noble gas configuration. So, when an electron is added to the outer most shell of chlorine it attains stability of fully filled outermost shell by which it releases energy on addition of an electron.

5) Cs^+(g)+Cl^-(g)\rightarrow CsCl(s)

Energy will get release on formation of CsCl(s) fromCs^+ cation and Cl^- anion. since both are oppositely charged ion and due to strong electrostatic interaction will get converted into stable molecule of CsCl (s) with release in an energy.

6 0
4 years ago
Based upon the intermolecular forces present, rank the following substances according to the expected boiling point for the subs
Trava [24]

Answer: NaCl>HCl&H2O> N2

Explanation:

NaCl, as an ionic substance has a very high boiling point as expected. However, the boiling points of HCl and H2O depend on the relative concentration of the HCl and water, at 20% HCl, it boils at almost the same temperature as water due to extensive intermolecular hydrogen bonding. N2 comprises only of Vanderwaals forces hence it has the least boiling point.

8 0
4 years ago
A 30-0 g sample of water at 280 K is mixed with 50.0 g of water at 330 K. How would you calculate the final temperature of the m
aliya0001 [1]

Answer:

311.25k

Explanation:

The question assumes heat is not lost to the surroundings, therefore

heat emitted from hotter sample ( q_{\ lost} )= heat absorbed by the less hotter  sample( q_{\ gain} )

The relationship between heat (q), mass (m) and temperature (t) is q = mc\Delta t

where c is specific heat capacity, \Delta t temperature change.

\Delta t = t_{\ final} - t_{\ initial}

equating both heat emitted and absorb

-q_{\ lost} = q_{\ gain}

-m_{1}(t_{\ final} - t_{\ 1initial})=m_{2}(t_{\ final} - t_{\ 2initial})

where the values with subset 1 are the values of the hotter sample of water and the values with subset 2 are the values of the less hot sample of water.

C will cancel out since both are water and they have the same specific heat capacity.

so we have

-m_{1}(t_{\ final} - t_{\ 1initial})=m_{2}(t_{\ final} - t_{\ 2initial})

where m1 = 50g, t 1initial = 330, m2 = 30g, t2 initial = 280,t final (final temperature of the mixture) = ?

-50 * (t_{final} - 330) = 30 *  (t_{final} - 280)

-50t_{final} + 16500 = 30t_{final} - 8400

80t_{final} = 16500+8400

80t_{final} = 24900

t_{final} = 24900/80 = 311.25k

8 0
3 years ago
Other questions:
  • Assume you have 60 micrograms (1 microgram = 10-6 gram) of pure u-238. how many nuclei n0 is this? (recall avogadro's number equ
    8·1 answer
  • Rusting Out. How Acids Affect the Rate of corrosion
    9·1 answer
  • When cool, dense air come over the water flows inland, it's called a?
    13·1 answer
  • Which structures are part of the body's first line of defense against pathogens?
    14·1 answer
  • I need help, I don't understand the question
    13·1 answer
  • A helium filled ballon had a volume of 8.50 L on the ground at 20.0 C and a pressure of 750.0 Torr. After the ballon was release
    15·1 answer
  • Air is a natural resource . <br><br> Ture <br> False
    13·1 answer
  • When gas molecules collide with other gas molecules or the walls of a container, does it affect their speed?
    15·1 answer
  • Did you know An apple, potato, and onion all taste the same if you eat them with your nose plugged , CRAZYYYYYYYYY
    5·1 answer
  • What is the theoretical yield of sodium chloride when 8.3 g of sodium is reacted with 4.5 g of chlorine? 2Na(s) + Cl2(g) → 2NaCl
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!